GIBILISCO.doc

8/14/2019 GIBILISCO.doc

1/89

QUIZ 1 BASIC PHYSICAL CONCEPT pg401. The atomic number of an element isdetermined by:

A. The number of neutrons.B. The number of protons.C. The number of neutrons plus thenumber of protons.D. The number of electrons.

2. The atomic weight of an element isapproimately determined by:

A. The number of neutrons.!. The number of protons.C. The number of neutrons pus thenumber of protons.D. The number of electrons.

". #uppose there is an atom of oygen$containing eight protons and eightneutrons in the nucleus$ and twoneutrons are added to the nucleus. Theresulting atomic weight is about:A. %.!. 10.C. 1&.

!. 1".4. An ion:A. 's electrically neutral.!. (as positi)e electric charge.C. (as negati)e electric charge.!. #$%ht h&'e e$ther & pos$t$'e orne%&t$'e (h&r%e.

*. An isotope:A. 's electrically neutral.!. (as positi)e electric charge.C. (as negati)e electric charge.!. #$%ht h&'e e$ther & pos$t$'e orne%&t$'e (h&r%e.

&. A molecule:

A. #$%ht (ons$st of )ust & s$n%e&tom of &n eement.!. +ust always contain two or moreelements.C. Always has two or more atoms.D. 's always electrically charged.

,. 'n a compound:A. There can be -ust a single atomof an element.B. There must &*&+s be t*o or moreeements.C. The atoms are mied in with eachother but not -oined.

D. There is always a shortage ofelectrons.

%. An electrical insulator can be made aconductor:

A. !y heating.!. !y cooling.C. B+ $on$,$n%.D. !y oidiing.

/. f the following substances$ the worstconductor is:

A. A$r.!. Copper.C. 'ron.

D. #alt water.10. f the following substances$ thebest conductor is:

A. Air.B. Copper.C. 'ron.D. #alt water.

11. +o)ement of holes in asemiconductor:

A. 's lie a flow of electrons

in the same direction.!. 's possible only if thecurrent is high enough.C. -esuts $n & (ert&$n &mountof ee(tr$( (urrent.D. Causes the material to stopconducting.

12. 'f a material has low resistance:A. It $s & %oo (onu(tor.!. 't is a poor conductor.C. The current flows mainly inthe form of holes.D. Current can flow only in one

direction.1". A coulomb:A. epresents a current of oneampere.!. 3lows through a 100wattlight bulb.C. 's one ampere per second.!. Is &n e/treme+ &r%e numberof (h&r%e (&rr$ers.

14. A stroe of lightning:A. 's caused by a mo)ement of holesin an insulator.!. (as a )ery low current.C. Is & $s(h&r%e of st&t$(

ee(tr$($t+.D. !uilds up between clouds.

1*. The )olt is the standard unit of:A. Current.!. Charge.C. Ee(tromot$'e for(e.D. esistance.

1&. 'f an 5+3 of one )olt is placed acrossa resistance of two ohms$ then the

current is:A. H&f &n &mpere.!. ne ampere.C. Two amperes.D. ne ohm.

1,. A bacwardsworing electric motor is

best described as:A. An inefficient$ energywastingde)ice.!. A motor with the )oltageconnected the wrong way.C. An ee(tr$( %ener&tor.D. A magneticfield generator.

1%. 'n some batteries$ chemical energy canbe replenished by:

A. Connecting it to a light bulb.B. Ch&r%$n% $t.C. Discharging it.D. 6o means nown7 when a battery isdead$ you ha)e to throw it away.


2/89

1/. A changing magnetic field:A. 8roduces an electric current in aninsulator.!. +agneties the earth.C. Prou(es & fu(tu&t$n% ee(tr$(f$e.D. esults from a steady electriccurrent.

20. 9ight is con)erted into electricity:A. 'n a dry cell.!. 'n a wet cell.

C. 'n an incandescent bulb.!. In & photo'ot&$( (e.


3/89

QUIZ 0 ELCT-ICAL UNITS1. A positi)e electric pole:

A. (as a deficiency of electrons.B. H&s fe*er ee(trons th&n thene%&t$'e poe.C. (as an ecess of electrons.D. (as more electrons than thenegati)e pole

2. An 5+3 of one )olt:A. Cannot dri)e much current through

a circuit.!. epresents a low resistance.C. C&n somet$mes prou(e & &r%e(urrent.D. Drops to ero in a short time.

". A potentially lethal electric currentis on the order of:

A. 0.01 mA.!. 0.1 mA.C. 1 mA.!. .1 A.

4. A current of 2* A is most liely drawnby:

A. A flashlight bulb.B. A t+p$(& househo.C. A power plant.D. A cloc radio.

*. A piece of wire has a conductance of 20siemens. 'ts resistance is:

A. 20 .!. 0.* .C. .2 3.D. 0.02 .

&. A resistor has a )alue of "00 ohms. 'tsconductance is:

A. 4.44 m$$s$emens.!. ""." millisiemens.

C. """ microsiemens.D. 0.""" siemens.

,. A mile of wire has a conductance of 0.&siemens. Then three miles of the same wirehas a conductance of:

A. 1.% siemens.!. 1.% .C. .0 s$emens.D. 6ot enough information has beengi)en to answer this.

%. A 2; generator will deli)erapproimately how much current$ reliably$at 11,


4/89

C. The gauss.D. The gaussturn.

1%. ;hich of the following units canrepresent magnetic flu density=

A. The )oltturn.!. The ampereturn.C. The %&uss.D. The gaussturn.

1/. A ferromagnetic material:A. Con(entr&tes m&%net$( fu/ $nes

*$th$n $tsef.!. 'ncreases the total magnetomoti)eforce around a currentcarryingwire.C. Causes an increase in the currentin a wire.D. 'ncreases the number of ampereturns in a wire.

20. A coil has *00 turns and carries ,* mAof current. The magnetomoti)e force willbe:

A. ",$*00 At.!. ",* At.

C. 45.2 At.D. ".,* At.


5/89

@'B "#EASU-IN: !E;ICE pg%*1. The force between two electrically chargedob-ects is called:

A. 5lectromagnetic deflection.B. Ee(trost&t$( for(e.C. +agnetic force.D. 5lectroscopic force.

2. The change in the direction of a compassneedle$ when a currentcarrying wire is broughtnear$ is:

A. Ee(trom&%net$( efe(t$on.

!. 5lectrostatic force.C. +agnetic force.D. 5lectroscopic force.

". #uppose a certain current in a gal)anometercauses the needle to deflect 20 degrees$ andthen this current is doubled. The needledeflection:

A. ;ill decrease.!. ;ill stay the same.C.


6/89

1%. The meter mo)ement in an illumination metermeasures:

A. Current.!.


7/89

@'B 4 BASIC !C CI-CUITpg/%1. #uppose you double the )oltage in a simpledc circuit$ and cut the resistance in half. Thecurrent will become:

A. >our t$mes &s %re&t.!. Twice as great.C. The same as it was before.D. (alf as great.

2. A wiring diagram would most liely be foundin:

A. An engineers general circuit idea

noteboo.!. An ad)ertisement for an electricalde)ice.C. The ser'$(e?rep&$r m&nu& for & r&$ore(e$'er.D. A procedural flowchart.

3or ?uestions " through 11$ see 3ig. 4,.

". i)en a dc )oltage source deli)ering 24 ou ha)e an unlimited supply of 1;$ 1000 resistors$ and you need a *00 resistancerated at , ; or more. This can be done byassembling:

A. >our sets of t*o 19res$stors $nser$es= &n (onne(t$n% these four sets$n p&r&e.!. 3our sets of two 1000 resistors inparallel$ and connecting these four setsin series.C. A "" seriesparallel matri of 1000 resistors.D. #omething other than any of theabo)e.

1/. >ou ha)e an unlimited supply of 1;$ 1000 resistors$ and you need to get a "000$ *;resistance. The best way is to:

A. +ae a 2 2 seriesparallel matri.!. Connect three of the resistors in

parallel.C. +ae a " " seriesparallel matri.!. !o someth$n% other th&n &n+ of the&bo'e.

20. ood engineering practice usually re?uiresthat a seriesparallel resisti)e networ bemade:

A. 3rom resistors that are all )eryrugged.B. >rom res$stors th&t &re & the s&me.C. 3rom a series combination ofresistors in parallel.D. 3rom a parallel combination ofresistors in series.


9/89

QUIZ 2!C CI-CUIT ANALYSIS811&1. 'n a seriesconnected string of holidayornament bulbs$ if one bulb gets shorted out$which of these is most liely=

A. All the other bulbs will go out.B. The (urrent $n the str$n% *$ %o up.C. The current in the string will godown.D. The current in the string will staythe same.

2. 3our resistors are connected in series

across a &.0< battery. The )alues are R1 F 10$ R2 F 20 $ R" F *0 $ and R4 F 100 asshown in 3ig. */. The )oltage across 2 is:

A. 0.1%


10/89

the eact same wattage. 'f I1 F *0 mA and I2 F,0 mA$ what is the power dissipated in theresistor carrying current '4=

A. "" ;.!. 40 m;.C. 1.4


11/89

QUIZ 6 -SISTO-S p%1421. !iasing in an amplifier circuit:

A. Eeeps it from oscillating.!. +atches it to other amplifier stagesin a chain.C. C&n be one us$n% 'ot&%e $'$ers.D. +aimies current flow.

2. A transistor can be protected from needlesso)erheating by:

A. Current9$m$t$n% res$stors.!. !leeder resistors.

C. +aimiing the dri)ing power.D. #horting out d power supply when thecircuit is off.

". !leeder resistors:A. Are (onne(te &(ross the (&p&($tor $n& po*er supp+.!. Eeep a transistor from drawing toomuch current.C. 8re)ent an amplifier from beingo)erdri)en.D. ptimie the efficiency of anamplifier.

4. Carboncomposition resistors:A. Can handle lots of power.!. (a)e capacitance or inductance along

with resistance.C. Are (omp&r&t$'e+ nonre&(t$'e.D. ;or better for ac than for dc.

*. The best place to use a wirewound resistoris:

A. 'n a radiofre?uency amplifier.!. ;hen the resistor doesnt dissipatemuch power.C. 'n a highpower$ radiofre?uencycircuit.!. In & h$%h9po*er= $re(t9(urrent($r(u$t.

&. A metalfilm resistor:A. 's made using solid carbonKphenolicpaste.

B. H&s ess re&(t&n(e th&n & *$re*ount+pe.C. Can dissipate large amounts of power.D. (as considerable inductance.

,. A metersensiti)ity control in a testinstrument would probably be:

A. A set of switchable$ fied resistors.B. A $ne&r9t&per potent$ometer.C. A logarithmictaper potentiometer.D. A wirewound resistor.

%. A )olume control in a stereo compactdiscplayer would probably be:

A. A set of switchable$ fied resistors.!. A lineartaper potentiometer.C. A o%&r$thm$(9t&per potent$ometer.

D. A wirewound resistor./. 'f a sound triples in actual power le)el$approimately what is the decibel increase=

A. " d!.B. 2 B.C. & d!.D. / d!.

10. #uppose a sound changes in )olume by 1"d!. 'f the original sound power is 1 ;$ what isthe final sound power=

A. 1" ;.!. ,, m;.C. 2 mou test themwith an ohmmeter. ;hich of the following)alues indicates a re-ect=

A. 2. 3.!. *".0 .C. */., .D. &1.1 .

1&. A resistor has a )alue of &%0 $ and

you epect it will ha)e to draw 1 mAmaimum continuous current. ;hat powerrating is best for this application=

A. 1?7


12/89

1/. The actual resistance of the abo)e unit canbe epected to )ary by how much abo)e or belowthe specified )alue=

A. 11 .B. 11 3.C. 22 .D. 220 .

20. A resistor has three bands: gray$ red$yellow. This unit can b epected to ha)e a)alue within appro what range=

A. 66 @3 to " @3.

!. ,40 E to /00 E.C. ,.4 E to /.0 E.D. The manufacturer does not mae anyclaim.

Ch&pter 5CELLS AN! BATTE-IESpg1*11. The chemical energy in a battery or cell:

A. 's a form of inetic energy.!. Cannot be replenished once it isgone.C. Ch&n%es to 8$net$( ener%+ *hen the(e $s use.D. 's caused by electric current.

2. A cell that cannot be recharged is:A. A dry cell.!. A wet cell.C. A pr$m&r+ (e.D. A secondary cell.

". A ;eston cell is generally used:A. As a current reference source.B. As & 'ot&%e referen(e sour(e.C. As a power reference source.

D. As an energy reference source.4. The )oltage in a battery is:

A. 9ess than the )oltage in a cell ofthe same ind.!. The same as the )oltage in a cell ofthe same ind.C. #ore th&n the 'ot&%e $n & (e ofthe s&me 8$n.D. Always a multiple of 1.01%


13/89

!. 'n a portable cassette player.C. 'n a handheld radio transcei)er.!. In more th&n one of the &bo'e.

1&. A disad)antage of mercury cells andbatteries is that:

A. They dont last as long as othertypes.!. They ha)e a flat discharge cur)e.C. The+ poute the en'$ronment.D. They need to be recharged often.

1,. ;hich ind of battery should ne)er be used

until it LdiesM=A. #il)eroide.!. 9eadacid.C. N$(8e9(&m$um.D. +ercury.

1%. The current from a solar panel is increasedby:

A. Connecting solar cells in series.!. @sing 6'CAD cells in series with thesolar cells.C. Conne(t$n% so&r (es $n p&r&e.D. @sing leadacid cells in series withthe solar cells.

1/. An interacti)e solar power system:A. Ao*s & homeo*ner to se po*er to

the ut$$t+.!. 9ets the batteries recharge at night.C. 8owers lights but not electronicde)ices.D. 's totally independent from theutility.

20. ne reason why it is impractical to mae anetremely high)oltage battery of cells isthat:

A. Theres a danger of electric shoc.!. 't is impossible to get more than10".* < with electrochemical cells.C. The battery would weigh to much.!. There $snt &n+ re& nee for su(hth$n%.


14/89


15/89

C. Diss loo better.D. Diss are less susceptible tomagnetic fields.

20. A bubble memory is best suited for:A. A &r%e (omputer.!. A home )ideo entertainment system.C. A portable cassette player.D. A magnetic dis.


16/89

TEST PA-T 11. An application in which an analog meterwould almost always be preferred o)er a digitalmeter is:

A. A signalstrength indicator in aradio recei)er.!. A meter that shows powersupply)oltage.C. A utility watthour meter.D. A cloc.5. A de)ice in which a direct numeric

display is wanted.2. ;hich of the following statements is false=

A. The current in a series dc circuit isdi)ided up among the resistances.!. 'n a parallel dc circuit$ the )oltageis the same across each component.C. 'n a series dc circuit$ the sum ofthe )oltages across all the components$going once around a complete circle$ isero.D. The net resistance of a parallel setof resistors is less than the )alue ofthe smallest resistor.5. The total power consumed in a seriescircuit is the sum of the wattages

consumed by each of the components.". The ohm is a unit of:

A. 5lectrical charge ?uantity.!. The rate at which charge carriersflow.C. pposition to electrical current.D. 5lectrical conductance.5. 8otential difference.

4. A wiring diagram differs from a schematicdiagram in that:

A. A wiring diagram is less detailed.!. A wiring diagram shows component)alues.C. A schematic does not show all theinterconnections between the components.

D. A schematic shows pictures ofcomponents$ while a wiring diagram showsthe electronic symbols.5. A schematic shows the electronicsymbols$ while a wiring diagram showspictures of the components.

*. ;hich of the following is a good use$ orplace$ for a wirewound resistor=

A. To dissipate a large amount of dcpower.!. 'n the input of a radiofre?uencyamplifier.C. 'n the output of a radiofre?uencyamplifier.D. 'n an antenna$ to limit the

transmitter power.5. !etween ground and the chassis of apower supply.

&. The number of protons in the nucleus of anelement is the:

A. 5lectron number.!. Atomic number.C.


17/89

A. An electrometer.!. A gal)anometer.C. A )oltmeter.D. A coulometer.5. A wattmeter.

1,. A disad)antage of mercury cells is thatthey:

A. 8ollute the en)ironment whendiscarded.!. #upply less )oltage than other cells.C. Can re)erse polarity unepectedly.

D. +ust be physically large.5. +ust be ept rightsideup.

1%. A battery supplies &.0 < to a bulb rated at12 ;. (ow much current does the bulb draw=

A. 2.0 A.!. 0.* A.C. ,2 A.D. 40 mA.5. ,2 mA.

1/. f the following$ which is not a common useof a resistor=

A. !iasing for a transistor.!.


18/89

A. 1K4


19/89

whose )alues are %.00 and 12.0 . ;hat is thepower dissipated in the % resistor=

A. 0."00 ;.!. 0.,*0 ;.C. 1.2* ;.Test: Part one 161D. 1.%0 ;.5. 4.*0 ;.

*0. The main problem with a bargraph meter isthat:

A. 's isnt )ery sensiti)e.

!. 't isnt stable.C. 't cant gi)e a )ery precise reading.D. >ou need special training to read it.5. 't shows only pea )alues.


20/89

CHAPTE- Alternating current basics p199

1. ;hich of the following can )ary with ac$ butnot with dc=

A. 8ower.!. reuen(+.D. +agnitude.

2. The length of time between a point in onecycle and the same point in the netcycle of an ac wa)e is the:

A. 3re?uency.!. +agnitude.C. Per$o.D. 8olarity.

". n a spectrum analyer$ a pure ac signal$ha)ing -ust one fre?uencycomponent$would loo lie:

A. A s$n%e p$p.!. A perfect sine wa)e.C. A s?uare wa)e.D. A sawtooth wa)e.

4. The period of an ac wa)e is:A. The same as the fre?uency.!. 6ot related to the fre?uency.C. Eu& to 1 $'$e b+ the freuen(+.

D. 5?ual to the amplitude di)ided by thefre?uency.

*. The sith harmonic of an ac wa)e whoseperiod is 0.001 second has afre?uency of

A. 0.00& (.!. 1&, (.C. , (.!. 6 8H,.

&. A degree of phase represents:A. &.2% cycles.!. *,." cycles.C. 1K&.2% cycle.!. 1?46 (+(e.

,. Two wa)es ha)e the same fre?uency but differ

in phase by 1K20 cycle. Thephase difference in degrees is:

A. 1".!. 20.C. "&.D. *.,".

%. A signal has a fre?uency of 1,,0 (. Theangular fre?uency is:

A. 1,,0 radians per second.B. 11=10 r&$&ns per se(on.C. 2%2 radians per second.D. 'mpossible to determine from the datagi)en.

/. A triangular wa)e:A. (as a fast rise time and a slow decay

time.!. (as a slow rise time and a fast decaytime.C. H&s eu& r$se &n e(&+ r&tes.D. ises and falls abruptly.

10. Threephase ac:A. (as wa)es that add up to three timesthe originals.B. H&s three *&'es= & of the s&me

m&%n$tue.C. 's what you get at a common walloutlet.D. 's of interest only to physicists.

11. 'f two wa)es ha)e the same fre?uencyand the same amplitude$ but oppositephase$ the composite wa)e is:

A. Twice the amplitude of eitherwa)e alone.!. (alf the amplitude of either wa)ealone.C. A comple wa)eform$ but with thesame fre?uency as the originals.!. Zero.

12. 'f two wa)es ha)e the same fre?uency

and the same phase$ the compositewa)e:

A. (as a magnitude e?ual to thedifference between the twooriginals.B. H&s & m&%n$tue eu& to the sumof the t*o or$%$n&s.C. 's comple$ with the samefre?uency as the originals.D. 's ero.

1". 'n a 11,< utility circuit$ the pea)oltage is:

A. %2.,


21/89

D. The speed of rotation of the coil ormagnet.

1/. 'f a 1,*< dc source were connected inseries with the utility mains from astandard wall outlet$ the result would be:

A. #mooth dc.!. #mooth ac.C. Ac with one pea greater than theother.! Pus&t$n% (.

20. An ad)antage of ac o)er dc in utility

applications is:A. A( $s e&s$er to tr&nsform from one'ot&%e to &nother.!. Ac is transmitted with lower loss inwires.C. Ac can be easily gotten from dcgenerators.D. Ac can be generated with lessdangerous byproducts.


22/89

Ch&pter 1 Inductancepg 2161. An inductor wors by:

A. Charging a piece of wire.B. Stor$n% ener%+ &s & m&%net$( f$e.C. Choing off highfre?uency ac.D. 'ntroducing resistance into acircuit.

2. ;hich of the following does not affect theinductance of a coil=

A. The $&meter of the *$re.!. The number of turns.

C. The type of core material.D. The length of the coil.

". 'n a small inductance:A. 5nergy is stored and released slowly.!. The current flow is always large.C. The current flow is always small.!. Ener%+ $s store &n ree&seu$(8+.

4. A ferromagnetic core is placed in aninductor mainly to:

A. 'ncrease the current carryingcapacity.B. In(re&se the $nu(t&n(e.C. 9imit the current.D. educe the inductance.

*. 'nductors in series$ assuming there is nomutual inductance$ combine:

A. 9ie resistors in parallel.B. L$8e res$stors $n ser$es.C. 9ie batteries in series withopposite polarities.D. 'n a way unlie any other type ofcomponent.

&. Two inductors are connected in series$without mutual inductance. Their)alues are "" m( and ** m(. The net inductanceof the combination is:

A. 1.% (.!. 22 m(.C. "" mH.

D. 21 m(.,. 'f the same two inductors H"" m( and ** m(Iare connected in parallelwithout mutual inductance$ the combination willha)e a )alue of:

A. 1.% (.!. 22 m(.C. %% m(.!. 01 mH.

%. Three inductors are connected in serieswithout mutual inductance. Their)alues are 4 n($ 140 G($ and * (. 3or practicalpurposes$ the net inductance will be )ery closeto:

A. 4 n(.

!. 140 G(.C. 2 H.D. 6one of these.

/. #uppose the three inductors mentioned abo)eare connected in parallelwithout mutual inductance. The net inductancewill be close to:

A. 7 nH.!. 140 G(.C. * (.D. 6one of these.

10. Two inductors$ each of 100 G($ are inseries. The coefficient of coupling is 0.40.

The net inductance$ if the coil fieldsreinforce each other$ is:

A. *0 G(.!. 120 G(.C. 200 G(.!. 0" H.

11. 'f the coil fields oppose in theforegoing seriesconnected arrangement$ thenet inductance is:

A. *0 G(.B. 10 H.

C. 200 G(.D. 2%0 G(.

12. Two inductors$ ha)ing )alues of 44 m(and %% m($ are connected in series with acoefficient of coupling e?ual to 1.0Hmaimum possible mutual inductanceI. 'ftheir fields reinforce$ the net inductanceHto two significant digitsI is:

A. ,.* m(.!. 1"2 m(.C. 1/0 m(.!. 06 mH.

1". 'f the fields in the pre)ious situationoppose$ the net inductance will be:

A. 5.2 mH.

!. 1"2 m(.C. 1/0 m(.D. 2&0 m(.

14. ;ith permeability tuning$ mo)ing thecore further into a solenoidal coil:

A. In(re&ses the $nu(t&n(e.!. educes the inductanceC. (as no effect on the inductance$but increases the currentcarryingcapacity of the coil.D. aises the fre?uency.

1*. A significant ad)antage$ in somesituations$ of a toroidal coil o)er asolenoid is:

A. The toroid is easier to wind.

!. The solenoid cannot carry as muchcurrent.C. The toroid is easier to tune.!. The m&%net$( fu/ $n & toro$ $s

pr&(t$(&+ & *$th$n the (ore.1&. A ma-or feature of a potcore windingis:

A. (igh current capacity.B. L&r%e $nu(t&n(e $n sm& 'oume.C. 5fficiency at )ery highfre?uencies.D. 5ase of inductance ad-ustment.

1,. As an inductor core material$ air:A. H&s e/(eent eff$($en(+.!. (as high permeability.

C. Allows large inductance in asmall )olume.D. (as permeability that can )aryo)er a wide range.

1%. At a fre?uency of 400 ($ the mostliely form for an inductor would be:

A. Aircore.!. #olenoidal.C. Toro$&.D. Transmissionline.

1/. At a fre?uency of /* +($ the best formfor an inductor would be:

A. A$r9(ore.!. 8ot core.


23/89

C. 5ither of the abo)e.D. 6either of the abo)e.

20. A transmissionline inductor made fromcoaial cable$ ha)ing )elocity factor of 0.&&$and woring at 4*0 +($ would be shorter than:

A. 1&., m.!. 11 m.C. 1&., cm.!. 11 (m.


24/89

CHAPTE- 11CAPACITANCEpg2"21. Capacitance acts to store electricalenergy as:

A. Current.!. .!. "" 3.C. 4,0 3.D. 10$000 3.

1*. A paper capacitor might ha)e a

)alue of:A. 0.001 p3.B. .1 >.C. 100 3.D. ""00 3.

1&. An air)ariable capacitor mightha)e a range of:

A. 0.01 3 to 1 3. !. 1 3 to 100 3. C. 1 p> to 1 p>.D. 0.001 p3 to 0.1 p3.

1,. ;hich of the following types ofcapacitors is polaried=

A. 8aper!. +ica.C. 'nterelectrode.!. Ee(tro+t$(.

1%. 'f a capacitor has a negati)etemperature coefficient:

A. Its '&ue e(re&ses &s thetemper&ture r$ses.!. 'ts )alue increases as thetemperature rises.C. 'ts )alue does not changewith temperature.


25/89

D. 't must be connected with thecorrect polarity.

1/. A capacitor is rated at "" p3$ plus orminus 10 percent. ;hich of the followingcapacitances is outside the acceptablerange=

A. "0 p3.B. 45 p>.C. "* p3.D. "1 p3.

20. A capacitor$ rated at ""0 p3$ shows anactual )alue of "1, p3. (ow many percentoff is its )alue=

A. 0.0"/.B. 4..C. 0.041.D. 4.1.


26/89


27/89

10914 'llustration for ?ui ?uestions 1&through 20.1%. 'n )ector diagrams such as those of 3ig.121"$ the angle between two )ectorsrepresents:

A. A)erage amplitude.!. 3re?uency.C. 8hase difference.

D. 8ea amplitude.1/. 'n )ector diagrams such as those of 3ig.121"$ the distance from the center of thegraph represents:

A. A)erage amplitude.!. 3re?uency.C. 8hase difference.D. 8ea amplitude.

20. 'n diagrams lie those of 3ig. 121"$ theprogression of time is sometimes depicted as:

A. +o)ement to the right.!. +o)ement to the left.C. otation counterclocwise.D. otation clocwise.

Ch&pter 14 IN!UCTI;E -EACTANCE pg2&41. As the number of turns in a coil increases$the current in the coil will e)entually:

A. !ecome )ery large.!. #tay the same.C. Decrease to near ero.D. !e stored in the core material.

2. As the number of turns in a coil increases$the reactance:

A. 'ncreases.!. Decreases.C. #tays the same.D. 's stored in the core material.

". As the fre?uency of an ac wa)e gets lower$the )alue of XL for a particular coil:

A. 'ncreases.!. Decreases.C. #tays the same.D. Depends on the )oltage.

4. A coil has an inductance of 100 m(. ;hat isthe reactance at a fre?uency of 1000 (=

A. 0.&2% .!. &.2% .C. &2.% .D. &2% .

*. A coil shows an inducti)e reactance of 200 at *00 (. ;hat is its inductance=

A. 0.&", (.!. &2% (.C. &"., m(.

D. &2% m(.&. A coil has an inductance of 400 G(. 'tsreactance is "" . ;hat is the fre?uency=

A. 1" (.!. 0.01" (.C. %" (.D. %" +(.

,. An inductor has XL F *** at f F 1"2(. ;hat is L?

A. &,0 m(.!. &,0 G(.

C. 4&0 m(.D. 4&0 G(.

%. A coil has L F &%/ G( at f F //0 (.;hat is XL=

A. &%2 .!. 4.2% .C. 4.2% E.D. 4.2% +.

/. An inductor has L F %% m( with XL F 100. ;hat is f=

A. **." (.!. **." (.C. 1%1 (.D. 1%1 (.

10. 5ach point in the 9 plane:

A. Corresponds to a uni?ueresistance.!. Corresponds to a uni?ueinductance.C. Corresponds to a uni?uecombination of resistance andinducti)e reactance.D. Corresponds to a uni?uecombination of resistance andinductance.

11. 'f the resistance R and the inducti)ereactance XL both )ary from ero tounlimited )alues$ but are always in theratio ":1$ the points in the 9 plane forall the resulting impedances will fall

along:A. A )ector pointing straight up.!. A )ector pointing Least.MC. A circle.D. A ray of unlimited length.

12. 5ach impedance R F jXL:A. Corresponds to a uni?ue point inthe 9 plane.!. Corresponds to a uni?ue inducti)ereactance.C. Corresponds to a uni?ueresistance.D. All of the abo)e.

1". A )ector is a ?uantity that has:A. +agnitude and direction.

!. esistance and inductance.C. esistance and reactance.D. 'nductance and reactance.

14. 'n an 9 circuit$ as the ratio ofinducti)e reactance to resistance$ XLKR$decreases$ the phase angle:

A. 'ncreases.!. Decreases.C. #tays the same.D. Cannot be found.

1*. 'n a purely reacti)e circuit$ the phaseangle is:

A. 'ncreasing.!. Decreasing.


28/89

C. 0 degrees.D. /0 degrees.

1&. 'f the inducti)e reactance is the same asthe resistance in an 9 circuit$ the phaseangle is:

A. 0 degrees.!. 4* degrees.C. /0 degrees.D. 'mpossible to find7 theres notenough data gi)en.

1,. 'n 3ig. 1"14$ the impedance shown is:

A. %.0.!. /0.C. /0 F j%.0.D. %.0 F j/0.

1%. 'n 3ig. 1"14$ note that the and XL scaledi)isions are of different sies. The phaseangle is:

A. About *0 degrees$ from the loos ofit.!. 4% degrees$ as measured with aprotractor.C. %* degrees$ as calculatedtrigonometrically.D. &.* degrees$ as calculatedtrigonometrically.

1/ An 9 circuit consists of a 100G( inductorand a 100 resistor. ;hat is the phase angleat a fre?uency of 200 (=

A. 4*.0 degrees.!. *1.* degrees.C. "%.* degrees.D. There isnt enough data to now.

20. An 9 circuit has an inductance of %% m(.The resistance is /* . ;hat is the phase angleat %00 (=A. ,% degrees.!. 12 degrees.C. 4" degrees.D. 4, degrees.

14917 'llustration for ?ui ?uestions 1, and1%.

Chapter 14 CAPACITI;E -EACTACTANCEpg 2%01. As the sie of the plates in a capacitorincreases$ all other things being e?ual:

A. The )alue of XC increases negati)ely.!. The )alue of XC decreases negati)ely.C. The )alue of XC does not change.

D. >ou cant say what happens to XCwithout more data.

2. 'f the dielectric material between theplates of a capacitor is changed$ all otherthings being e?ual:

A. The )alue of XC increasesnegati)ely.!. The )alue of XC decreasesnegati)ely.C. The )alue of XC does not change.D. >ou cant say what happens to XC

without more data.". As the fre?uency of a wa)e gets lower$all other things being e?ual$ the )alue ofXC for a capacitor:

A. 'ncreases negati)ely.!. Decreases negati)ely.C. Does not change.D. Depends on the current.

4. A capacitor has a )alue of ""0 p3. ;hatis its capaciti)e reactance at a fre?uencyof %00 (=

A. F1.&& .!. F0.001&& .C. F&0" .D. F&0" E.

*. A capacitor has a reactance of F4.*0 at ",, (. ;hat is its capacitance=

A. /."/ G3.!. /"./ G3.C. ,.42 G3.D. ,4.2 G3.

&. A capacitor has a )alue of 4, G3. 'tsreactance is F4, . ;hat is the fre?uency=

A. ,2 (.!. ,.2 +(.C. 0.0000,2 (.D. ,.2 (.

,. A capacitor has XCFF%%00 at f F %"0(. ;hat is C=

A. 2.1% G3.

!. 21.% p3.C. 0.0021% G3.D. 2.1% p3.

%. A capacitor has C F 1&& p3 at f F 400(. ;hat is XC=

A. F2.4 E .!. F2.4 .C. F2.4 N 10F& .D. F2.4 + .

/. A capacitor has C F 4,00 G3 and XCFF"". ;hat is f=

A. 1.0 (.!. 10 (.C. 1.0 (.D. 10 (.

10. 5ach point in the C plane:A. Corresponds to a uni?ueinductance.!. Corresponds to a uni?uecapacitance.C. Corresponds to a uni?uecombination of resistance andcapacitance.D. Corresponds to a uni?uecombination of resistance andreactance.

11 'f R increases in an C circuit$ but XCis always ero$ then the )ector in the Cplane will:


29/89

A. otate clocwise.!. otate counterclocwise.C. Always point straight towards theright.D. Always point straight down.

12. 'f the resistance R increases in an Ccircuit$ but the capacitance and the fre?uencyare nonero and constant$ then the )ector inthe C plane will:

A. et longer and rotate clocwise.!. et longer and rotate

counterclocwise.C. et shorter and rotate clocwise.D. et shorter and rotate

counterclocwise.1". 5ach impedance R F jXC:

A. epresents a uni?ue combination ofresistance and capacitance.!. epresents a uni?ue combination ofresistance and reactance.C. epresents a uni?ue combination ofresistance and fre?uency.D. All of the abo)e.

14. 'n an C circuit$ as the ratio ofcapaciti)e reactance to resistance$ FXCKR$ getscloser to ero$ the phase angle:

A. ets closer to F/0 degrees.!. ets closer to 0 degrees.C. #tays the same.D. Cannot be found.

1*. 'n a purely resisti)e circuit$ the phaseangle is:

A. 'ncreasing.!. Decreasing.C. 0 degrees.D. F/0 degrees.

1&. 'f the ratio of XCKR is 1$ the phase angleis:

A. 0 degrees.!. F4* degrees.C. F/0 degrees.

D. 'mpossible to find7 theres notenough data gi)en.

1,. 'n 3ig. 141"$ the impedance shown is:A. %.02 F j"2".!. "2" F j%.02.C. %.02 F j"2".D. "2" F j%.02.

17914 'llustration for ?ui ?uestions 1, and1%.

1%. 'n 3ig. 141"$ note that the R and XCscale di)isions are not the same sie. Thephase angle is

A. 1.42 degrees.!. About F&0 degress$ from the loosof it.C.F*%./ degrees.D. F%%.& degrees.

1/. An C circuit consists of a 1*0p3capacitor and a ""0 resisitor in series.;hat is the phase angle at a fre?uency of

1."4 +(=A. P&,.4 degrees.!. P22.& degrees.C. P24.4 degrees.D. P&*.& degrees.

20. An C circuit has a capitance of 0.01*G3. The resistance is *2 . ;hat is thephase angle at /0 (=A. P24 degrees.!. P0.01, degrees.C. P&& degrees.D. 6one of the abo)e.

C(A8T5 1* Impe&n(e &n &m$tt&n(e pg"011. The s?uare of an imaginary number:

A. Can ne)er be negati)e.!. Can ne)er be positi)e.C. +ight be either positi)e ornegati)e.D. 's e?ual to j.

2. A comple number:A. 's the same thing as animaginary number.!. (as a real part and animaginary part.C. 's onedimensional.D. 's a concept reser)ed forelite imaginations.

". ;hat is the sum of " F j, and F" Fj,=A. 0 F j0!. & F j14.C. F& F j14.D. 0 F j14.

4. ;hat is HF * F j,I F H4 F j*I=A. F1 F j2.!. F/ F j2.C. F1 F j2.D. F/ F j12.

*. ;hat is the product HF4 F j,IH& Fj2I=

A. 24 F j14.

!. F"% F j"4.C. F24 P j14.D. F24 F j14.

&. ;hat is the magnitude of the )ector1% F j24=

A. 42.!. F42.C. "0.D. F"0.

,. The impedance )ector * F j0represents:

A. A pure resistance.


30/89

!. A pure inductance.C. A pure capacitance.D. An inductance combined with acapacitance.

%. The impedance )ector 0 F j22represents:

A. A pure resistance.!. A pure inductance.C. A pure capacitance.D. An inductance combined with a

resistance./. ;hat is the absolute)alue impedance of".0 F j&.0=

A. F /.0 .!. F ".0 .C. F 4* .D. F &., .

10. ;hat is the absolute)alue impedanceof *0 F j2"*=

A. F 240 .!. F *%$000 .C. F 2%* .D. FF1%* .

11. 'f the center conductor of a coaialcable is made to ha)e smaller diameter$all other things being e?ual$ what willhappen to the o of the transmission line=

A. 't will increase.!. 't will decrease.C. 't will stay the same.D. There is no way to now.

12. 'f a de)ice is said to ha)e animpedance of F 100 $ this would mostoften mean that:

A. R F jQ F 100 F j0.!. R F jQ F 0 F j100.C. R F jQ F 0 F j100.D. >ou need to now more specificinformation.

1". A capacitor has a )alue of 0.0*0 G3 at&&* (. ;hat is the capaciti)esusceptance=

A. j4.,/.!. Fj4.,/.C. j0. 20/.D. Fj0. 20/.

14. An inductor has a )alue of 44 m( at &0(. ;hat is the inducti)e susceptance=

A.. Fj0.0&0.!. j0.0&0.

C. Fj1,.D. j1,.

1*. #usceptance and conductance add toform:

A. 'mpedance.!. 'nductance.C. eactance.D. Admittance.

1&. Absolute)alue impedance is e?ual tothe s?uare root of:

A. !2 F"2!. R2 F X2.C. o.

D. Y.1,. 'nducti)e susceptance is measuredin:

A. hms.!. (enrys.C. 3arads.D. #iemens.

1%. Capaciti)e susceptance is:A. 8ositi)e and real )alued.!. 6egati)e and real )alued.

C. 8ositi)e and imaginary.D. 6egati)e and imaginary.

1/. ;hich of the following is false=A. "C F 1KXC.!. Comple impedance can bedepicted as a )ector.C. Characteristic impedance iscomple.D. ! F 1KR.

20. 'n general$ the greater theabsolute )alue of the impedance in acircuit:

A. The greater the flow of

alternating current.!. The less the flow ofalternating current.C. The larger the reactance.D. The larger the resistance.

Ions


31/89

CHAPTE- 16 -LC ($r(u$t &n&+s$s pg"221. A coil and capacitor are connected inseries. The inducti)e reactance is 2*0 $ andthe capaciti)e eactance is F"00 . ;hat is thenet impedance )ector$ R F jX=

A. 0 F j**0.!. 0 F j*0.C. 2*0 F j"00D. F"00 F j2*0.

2. A coil of 2*.0 G( and capacitor of 100 p3are connected in series. The fre?uency is *.00

+(. ;hat is the impedance )ector$ R F jX=A 0 F j4&,.!. 2* F j100.C. 0 F j4&,.D. 2* F j100.

". ;hen R F 0 in a series 9C circuit$ but thenet reactance is not ero$ the impedance)ector:

A. Always points straight up.!. Always points straight down.C. Always points straight towards theright.D. 6one of the abo)e.

4. A resistor of 1*0 $ a coil with reactance100 and a capacitor with reactance P200 are

connected in series. ;hat is the compleimpedance R F jX=

A. 1*0 F j100.!. 1*0 F j200.C. 100 F j200.D. 1*0 F j100.

*. A resistor of ""0 $ a coil of 1.00 G( and acapacitor of 200 p3 are in series. ;hat is R FjX at 10.0 +(=

A. ""0 F j1//.!. "00 F j201.C. "00 F j142.D. ""0 F j1&.%.

&. A coil has an inductance of ".00 G( and aresistance of 10.0 in its winding. A

capacitor of 100 p3 is in series with thiscoil. ;hat is R F jX at 10.0 +(=

A. 10 F j".00.!. 10 F j2/.2.C. 10 F j/,.D. 10 F j"4%.

,. A coil has a reactance of 4.00 . ;hat isthe admittance )ector$ ! F j", assuming nothingelse is in the circuit=

A. 0 F j0.2*.!. 0 F j4.00.C. 0 P j0.2*.D. 0 F j4.00.

%. ;hat will happen to the susceptance of acapacitor if the fre?uency is doubled$ all

other things being e?ual=A. 't will decrease to half its former)alue.!. 't will not change.C. 't will double.D. 't will ?uadruple.

/. A coil and capacitor are in parallel$ withj"9FFj0.0* and j"C F j0.0". ;hat is theadmittance )ector$ assuming that nothing is inseries or parallel with these components=

A. 0 F j0.02.!. 0 F j0.0,.C. 0 F j0.02.D. F0.0* F j0.0".

10. A coil$ resistor$ and capacitor are inparallel. The resistance is 1 7 thecapaciti)e susceptance is 1.0 siemens7 theinducti)e susceptance is F1.0 siemens. Thenthe fre?uency is cut to half its former)alue. ;hat will be the admittance )ector$! F j"$ at the new fre?uency=

A. 1 F j0.!. 1 F jl.*.C. 1 F jl.*.D. 1 P j2.

11. A coil of ".*0 G( and a capacitor of4,.0 p3 are in parallel. The fre?uency is/.** +(. There is nothing else in seriesor parallel with these components. ;hat isthe admittance )ector=

A. 0 F j0.002%2.!. 0 P j0.001/4.C. 0 F j0.001/4.D. 0 P j0.00,*%.

12. A )ector pointing LsoutheastM in the !plane would indicate the following:

A. 8ure conductance$ erosusceptance.!. Conductance and inducti)esusceptance.

C. Conductance and capaciti)esusceptance.D. 8ure susceptance$ eroconductance.

1". A resistor of 0.0044 siemens$ acapacitor whose susceptance is 0.0"*siemens$ and a coil whose susceptance isF0.011 siemens are all connected inparallel. The admittance )ector is:

A. 0.0044 F j0.024.!. 0.0"* P j0.011.C. F0.011 F j0.0"*.D. 0.0044 F j0.04&.

14. A resistor of 100 $ a coil of 4.*0 G($and a capacitor of 220 p3 are in parallel.

;hat is the admittance )ector at &.*0 +(=A. 100 F j0.00"*4.!. 0.010 F j0.00"*4.C. 100 P j0.0144.D. 0.010 F j0.0144.

1*. The admittance for a circuit$ ! F j"$is 0.02 F j0.20. ;hat is the impedance$ FjX=

A. *0 F j*.0.!. 0.4/* F j4./*.C. *0 F j*.0.D. 0.4/* F j4./*.

1&. A resistor of *1.0 $ an inductor of22.0 G( and a capacitor of 1*0 p3 are inparallel. The fre?uency is 1.00 +(. ;hat

is the comple impedance$ R F jX=A. *1.0 F j14./.!. *1.0 F j14./.C. 4&.2 F j14./.D. 4&.2 F j14./.

1,. A series circuit has //.0 ofresistance and %%.0 of inducti)ereactance. An ac rms )oltage of 11, < isapplied to this series networ. ;hat is thecurrent=

A. 1.1% A.!. 1.1" A.C. 0.%%& A.D. 0.%4& A.


32/89

1%. ;hat is the )oltage across the reactance inthe abo)e eample=

A. ,%.0


33/89

D. /4* p3.1,. A parallelresonant circuit is to be madefor 21." +(. A capacitor of 22.0 p3 isa)ailable. ;hat sie coil is needed=

A. 2.*4 m(.!. 2*4 G(.C. 2*.4 G(.D. 2.*4 G(.

1%. A 1K4wa)e line section is made for 21.1+($ using cable with a )elocity factor of0.%00. (ow many meters long is it=

A. 11.1 m.!. ".** m.C. %.%, m.D. 2.%4 m.

1/. The fourth harmonic of %00 ( is:A. 200 (.!. 400 (.C. ".20 +(.D. 4.00 +(.

20. (ow long is a 1K2wa)e dipole for ".&0 +(=A. 1"0 feet.!. 1&%0 feet.C. "/., feet.D. *1* feet.


34/89

Ch&pter 1" Tr&nsformers &n $mpe&n(e m&t(h$n%pg"&"1. 'n a stepup transformer:

A. The primary impedance is greater thanthe secondary impedance.!. The secondary winding is right on topof the primary.C. The primary )oltage is less than thesecondary )oltage.D. All of the abo)e.

2. The capacitance between the primary and the

secondary windings of a transformer can beminimied by:

A. 8lacing the windings on oppositesides of a toroidal core.!. ;inding the secondary right on top ofthe primary.C. @sing the highest possible fre?uency.D. @sing a center tap on the balancedwinding.

". A transformer steps a )oltage down from 11,< to &.00


35/89


36/89

T5#T 8AT 2

1. A series circuit has a resistance of100 and a capaciti)e reactance of 200. The comple impedance is:

A. F200 F -100.!. 100 F -200.C. 200 F -100.D. 200 F -100.5. 100 F -200.

2. +utual inductance causes the net )alue

of a set of coils to:A. Cancel out$ resulting in eroinductance.!. !e greater than what it would bewith no mutual coupling.C. !e less than what it would bewith no mutual coupling.D. Double.5.


37/89

5. Two full cycles.1&. 'f R denotes resistance and denotesabsolute)alue impedance$ then RK is the:

A. True power.!. 'maginary power.C. Apparent power.D. Absolute)alue power.5. 8ower factor.

1,. Two comple impedances are in series.ne is "0 S j*0 and the other is *0 R j"0.

The net impedance is:A. %0 S j%0.!. 20 S j20.C. 20 F j20.D. F20 S j20.5. %0 S j20.

1%. Two inductors$ ha)ing )alues of 140 G(and 1.*0 m($ are connected in series. Thenet inductance is:

A. 141.* G(.!. 1.&4 G(.C. 0.141* m(.D. 1.&4 m(.

5. 0.1&4 m(.1/. ;hich of the following types ofcapacitor is polaried=

A. +ica.!. 8aper.C. 5lectrolytic.D. Air )ariable.5. Ceramic.

20. A toroidalcore coil:A. (as lower inductance than an aircore coil with the same number ofturns.!. 's essentially selfshielding.C. ;ors well as a loopstic

antenna.D. 's ideal as a transmissionlinetransformer.5. Cannot be used at fre?uenciesbelow about 10 +(.

21. The efficiency of a generator:A. Depends on the dri)ing powersource.!. 's e?ual to output power di)idedby dri)ing power.C. Depends on the nature of theload.D. 's e?ual to dri)ing )oltage

di)ided by output )oltage.5. 's e?ual to dri)ing currentdi)ided by output current.

22. Admittance is:A. The reciprocal of reactance.!. The reciprocal of resistance.C. A measure of the opposition acircuit offers to ac.D. A measure of the ease with whicha circuit passes ac.5. Another epression for absolute)alue impedance.

2". The absolute)alue impedance ofa parallel 9C circuit$ where R is theresistance and X is the net reactance$is found according to the formula:

A. F R S X.!. 2F R2 S X2.C. 2F RXKHR2 S X2I.D. B F 1KHR2 S X2I.5. F R2X2&'R S XI.

24. Comple numbers are used to

represent impedance because:A. eactance cannot store power.!. eactance isnt a realphysical thing.C. They pro)ide a way torepresent what happens inresistancereactance circuits.D. 5ngineers lie to wor withsophisticated mathematics.5. 6o Comple numbers arentused to represent impedance.

2*. ;hich of the following does notaffect the capacitance of a capacitor=

A. The mutual surface area ofthe plates.!. The dielectric constant ofthe material between the platesHwithin reasonI.C. The spacing between theplates Hwithin reasonI.D. The amount of o)erlap betweenplates.5. The fre?uency Hwithin reasonI.

2&. The erodegree phase point in anac sine wa)e is usually considered tobe the instant at which the amplitudeis:

A. Bero and negati)egoing.!. At its negati)e pea.C. Bero and positi)egoing.D. At its positi)e pea.5. Any )alue7 it doesnt matter.

2,. The inductance of a coil can becontinuously )aried by:

A.


38/89

resisti)e impedance of 200 . A ?uarterwa)e matching section should ha)e:

A. o F 1*0 .!. o F 2*0 .C. o F 12* .D. o F 1"" .5. o F 100 .

"0. The )ector 40 S j"0 represents:A. 40 resistance and "0 G(inductance.

!. 40 u( inductance and "0 resistance.C. 40 resistance and "0 inducti)e reactance.D. 40 inducti)e reactance and "0 resistance.5. 40 u( inducti)e reactance and "0 resistance.

"1. 'n a series C circuit$ where$ R F "00 and XC F R"0 :

A. The current leads the )oltage bya few degrees.!. The current leads the )oltage by

almost /0 degrees.C. The )oltage leads the current bya few degrees.D. The )oltage leads the current byalmost /0 degrees.5. The )oltage leads the current by/0 degrees.

"2. 'n a stepdown transformer:A. The primary )oltage is greaterthan the secondary )oltage.!. The primary impedance is lessthan the secondary impedance.C. The secondary )oltage is greaterthan the primary )oltage.

D. The output fre?uency is higherthan the input fre?uency.5. The output fre?uency is lowerthan the input fre?uency.

"". A capacitor of 4,0 p3 is in parallelwith an inductor of 4.44 G(. ;hat is theresonant fre?uency=

A. ".4/ +(.!. ".4/ (.C. 1".0 +(.D. 1".0 (.5. 6ot determinable from the datagi)en.

"4. A sine wa)e contains energy at:A. Uust one fre?uency.!. A fre?uency and its e)enharmonics.C. A fre?uency and its oddharmonics.D. A fre?uency and all itsharmonics.5. A fre?uency and its secondharmonic only.

"*. 'nducti)e susceptance is:A. The reciprocal of inductance.!. 6egati)e imaginary.

C. 5?ual to capaciti)e reactance.D. The reciprocal of capaciti)esusceptance.5. A measure of the opposition acoil offers to ac.

"&. The rate of change Hderi)ati)eI ofa sine wa)e is itself a wa)e that:

A. 's in phase with the originalwa)e.

!. 's 1%0 degrees out of phase

with the original wa)e.C. 9eads the original wa)e by 4*degrees of phase.D. 9ags the original wa)e by /0degrees of phase.5. 9eads the original wa)e by /0degrees of phase.

",. True power is e?ual to:A.


39/89

5. #ubtract reactance fromresistance to get R R jX.

41. The illustration in 3ig. Test 22shows a )ector R S jX representing:

A. XC F &0 and R F 2* .!. X9 F &0 and R F 2* .C. X9 F &0 G( and R F 2* .D. C F &0 G3 and R F 2* .5. L F &0 G( and R F 2* .

?uestion 41.

42. 'f two sine wa)es ha)e the samefre?uency and the same amplitude$ but theycancel out$ the phase difference is:

A. 4* degrees.!. /0 degrees.C. 1%0 degrees.D. 2,0 degrees.5. "&0 degrees.

4". A series circuit has a resistance of*0 and a capaciti)e reactance of R", .The phase angle is:

A. ", degrees.!. *" degrees.

C. R", degrees.D. R*" degrees.5. 6ot determinable from the datagi)en.

44. A 200 resistor is in series with acoil and capacitor7 X9 F 200 and XC FR100 . The comple impedance is:

A. 200 R j100.!. 200 R j200.C. 200 S j100.D. 200 S j200.5. 6ot determinable from the datagi)en.

4*. The characteristic impedance of a

transmission line:A. 's negati)e imaginary.!. 's positi)e imaginary.C. Depends on the fre?uency.D. Depends on the construction ofthe line.5. Depends on the length of theline.

4&. The period of a wa)e is 2 F 10R%second. The fre?uency is:

A. 2 F 10% (.!. 20 +(.C. *0 (.

D. *0 +(.5. *00 +(.4,. A series circuit has a resistance of&00 and a capacitance of 220 p3. Thephase angle is:

A. R20 degrees.!. 20 degrees.C. R,0 degrees.D. ,0 degrees.5. 6ot determinable from the data

gi)en.4%. A capacitor with a negati)etemperature coefficient:

A. ;ors less well as thetemperature increases.!. ;ors better as thetemperature increases.C. (eats up as its )alue is madelarger.D. Cools down as its )alue ismade larger.5. (as increasing capacitance astemperature goes down.

4/. Three coils are connected inparallel. 5ach has an inductance of"00G(. There is no mutual inductance.The net inductance is:

A. 100 G(.!. "00 G(.C. /00 G(.D. 1,." G(.5. 1," G(.

*0. An inductor shows 100 ofreactance at "0.0 +(. ;hat is itsinductance=

A. 0.*"1 G(.

!. 1%.% m(.C. *"1 G(.D. 1%.% G(.

5. 't cant be found from the datagi)en


40/89

CHAPTE- 1 Introu(t$on to SE#ICON!UCTO-S pg"%%1. The term LsemiconductorM arises from:

A. esistorlie properties of metaloides.!.


41/89


42/89

Ch&pter 0 SO#E USES O> !IO!ES pg 4011. ;hen a diode is forwardbiased$ theanode:

A. 's negati)e relati)e to thecathode.!. 's positi)e relati)e to thecathode.C. 's at the same )oltage as thecathode.

D. Alternates between positi)e andnegati)e relati)e to the cathode.

2. 'f ac is applied to a diode$ and thepea ac )oltage ne)er eceeds thea)alanche )oltage$ then the output is:

A. Ac with half the fre?uency of theinput.!. Ac with the same fre?uency as theinput.C. Ac with twice the fre?uency ofthe input.D. 6one of the abo)e.

". A crystal set:

A. Can be used to transmit radiosignals.!. e?uires a battery with longlife.C. e?uires no battery.D. 's useful for rectifying &0(ac.

4. A diode detector:A. 's used in power supplies.!. 's employed in some radiorecei)ers.C. 's used commonly in highpowerradio transmitters.D. Changes dc into ac.

*. 'f the output wa)e in a circuit has thesame shape as the input wa)e$ then:

A. The circuit is linear.!. The circuit is said to bedetecting.C. The circuit is a mier.D. The circuit is a rectifier.

&. The two input fre?uencies of a miercircuit are ".*22 +( and "./,, +(. ;hichof the following fre?uencies might be usedat the output=

A. 4** (.!. %%& (.

C. 14.00 +(.D. 1.12/ +(.,. A timedomain display might be foundin:

A. An ammeter.!. A spectrum analyer.C. A digital )oltmeter.D. An oscilloscope.

%. Bener )oltage is also nown as:A. 3orward breao)er )oltage.!. 8ea forward )oltage.C. A)alanche )oltage.D. e)erse bias.

/. The forward breao)er )oltage of asilicon diode is:

A. About 0."


43/89

D. A laser diode.1%. The power from a solar panel dependson all of the following ecept:

A. The operating fre?uency of thepanel.

!. The total surface area of thepanel.C. The number of cells in the panel.D. The intensity of the light.

1/. 5mission of energy in an '5D is

caused by:A. (ighfre?uency radio wa)es.!. ectification.C. 5lectron energyle)el changes.D. 6one of the abo)e.

20. A photodiode$ when not used as aphoto)oltaic cell$ has:

A. e)erse bias.!. 6o bias.C. 3orward bias.D. 6egati)e resistance.


44/89


45/89

C. 5ffecti)e for transient suppression.D. 5ffecti)e for surge suppression.

20. To ser)ice a power supply with which youare not completely familiar$ you should:

A. 'nstall bleeder resistors.!. @se proper fusing.C. 9ea)e it alone and ha)e aprofessional wor on it.D. @se a )oltage regulator.


46/89


47/89

!. Commonbase circuit.C. Commoncollector circuit.D. 5mitterfollower circuit.

1%. 'n a commonbase circuit$ the outputis taen from the:

A. 5mitter.!. !ase.C. Collector.D. +ore than one of the abo)e.

1/. The input signal to a transistor

amplifier results in saturation duringpart of the cycle. This produces:

A. The greatest possibleamplification.!. educed efficiency.C. A)alanche effect.D. 6onlinear output impedance.

20. The gain of a transistor in a commonemitter circuit is 100 at a fre?uency of1000 (. The gain is ,0., at ""* (. Thegain drops to 1 at 210 +(. The alphacutoff is:

A. 1 (.

!. ""* (.C. 210 +(.D. 6one of the abo)e.


48/89

Ch&pter 04 THE >IEL!9E>>ECT T-ANSISTO-1. The current through the channel of aU35T is directly affected by all of thefollowing e(cept:

A. Drain )oltage.!. Transconductance.C. ate )oltage.D. ate bias.

2. 'n an 6channel U35T$ pinchoff occurswhen the gate bias is:

A. #lightly positi)e.!. Bero.C. #lightly negati)e.D.


49/89

1%. 'n a source follower$ which of theelectrodes of the 35T recei)es the inputsignal=

A. 6one of them.!. The source.C. The gate.D. The drain.

1/. ;hich of the following circuits hasits output 1%0 degrees out of phase withits input=

A. Common source.!. Common gate.C. Common drain.D. All of them.

20. ;hich of the following circuitsgenerally has the greatest gain=

A. Common source.!. Common gate.C. Common drain.D. 't depends only on bias$ not onwhich electrode is grounded.


50/89

Ch&pter 07 Amp$f$ers1. The decibel is a unit of:

A. elati)e signal strength.!.


51/89


52/89

Ch&pter 02 Os($&tors1. 6egati)e feedbac in an amplifier:

A. Causes oscillation.!. 'ncreases sensiti)ity.C. educes the gain.D. 's used in an Armstrong oscillator.

2. scillation re?uires:A. A commondrain or commoncollectorcircuit.!. A stage with gain.C. A tapped coil.

D. 6egati)e feedbac.". A Colpitts oscillator can be recognied by:

A. A split capacitance in the tunedcircuit.!. A tapped coil in the tuned circuit.C. A transformer for the feedbac.D. A commonbase or commongatearrangement.

4. 'n an oscillator circuit$ the feedbacshould be:

A. As great as possible.!. Eept to a minimum.C. Uust enough to sustain oscillation.D. Done through a transformer whosewires can be switched easily.

*. A tapped coil is used in aHnI:A. (artley oscillator.!. Colpitts oscillator.C. Armstrong oscillator.D. Clapp oscillator.

&. An 3 choe:A. 8asses 3 but not dc.!. 8asses both 3 and dc.C. 8asses dc but not 3.D. !locs both dc and 3.

,. 3erromagnetic coil cores are not generallygood for use in 3 oscillators because:

A. The inductances are too large.!. 'ts hard to )ary the inductance ofsuch a coil.

C. #uch coils are too buly.D. Aircore coils ha)e better thermalstability.

%. An oscillator might fail to start for any ofthe following reasons e(cept:

A. 9owpowersupply )oltage.!. 9ow stage gain.C. 'nphase feedbac.D.


53/89

D. #er)es no useful purpose.20. An '+8ATT diode:

A. +aes a good audio oscillator.!. Can be used for wa)eform analysis.C. 's used as a microwa)e oscillator.D. Allows for fre?uency ad-ustment of a


54/89

Ch&pter 06 !&t& tr&nsm$ss$on1. A radio wa)e has a fre?uency of 1.**+(. The highest modulating fre?uency thatcan be used effecti)ely is about:

A. 1.** (.!. 1*.* (.C. 1** (.D. 1.** +(.

2. +orse code is a form of:A. Digital modulation.

!. Analog modulation.C. 8hase modulation.D. dc modulation.

". An ad)antage of 3#E o)er simple onoffeying for TT> is:

A. !etter fre?uency stability.!. (igher speed capability.C. educed number of misprints.D. noff eying is -ust as good as3#E.

4. The maimum A+ percentage possiblewithout distortion is:

A. "" percent.

!. &, percent.C. 100 percent.D. 1*0 percent.

*. 'f an A+ signal is modulated with audioha)ing fre?uencies up to * ($ then thecomplete signal bandwidth will be:

A. 10 (.!. & (.C. * (.D. " (.

&. An A+ transmitter using a classC 8Ashould employ:

A. Carrier suppression.!. (ighle)el modulation.

C. 9ower sideband.D. #ingle sideband.

,. ;hich of the following modulationmethods is used to send teleprinter datao)er the phone lines=

A. C;.!. ##!.C. A+.D. A3#E.

%. An ad)antage of ##! o)er A+ is:A. (igher data transmission rate.!. +ore effecti)e use of transmitterpower.

C. reater bandwidth.D. 5nhanced carrier wa)e le)el.

/. An ##! suppressed carrier is at 14.""*+(. The )oice data is contained in a bandfrom 14.""*14.""% +(. The mode is:

A. A+.!. 9#!.C. @#!.D. 3#E.

10. A spectrum analyer displays:A. Time as a function of fre?uency.!. 3re?uency as a function of time.

C. #ignal strength as a functionof time.D. #ignal strength as a functionof fre?uency.

11. The de)iation for )oice 3+ signalsis usually:

A. 8lusorminus " (.!. 8lusorminus * (C. 8lusorminus & (.D. 8lusorminus 10 (.

12. ;ideband 3+ is preferable tonarrowband 3+ for music transmissionbecause:

A. 9ower fre?uencies are heardbetter.!. #pectrum space is conser)ed.C. The fidelity is better.D. 6o 6arrowband 3+ is betterfor music.

1". 'n which mode of 8+ does the pulsele)el )ary=

A. 8A+.!. 8D+.

C. 8;+.D. 83+.14. 'n which 8+ mode do pulses lastfor )arying times=

A. 8A+.!. 8;+.C. 83+.D. 8C+.

1*. (ow many states are commonly usedfor the transmission of digitied)oice signals=

A. Two.!. 3our.C. #i.

D. 5ight.1&. 'n an ##T< signal$ the frame timeis:

A. 1K*2* second.!. 1K"0 second.C. 1K% second.D. % seconds.

1,. The bandwidth of a fa signal isept narrow by:

A. #ending the data at a slowrate of speed.!. 9imiting the image resolution.C. 9imiting the range of shades

sent.D. @sing pulse modulation.

1%. ;hat is the wa)elength of a 21."+( signal=

A. 4&.2 m.!. 14.1 m.C. 21.0 m.D. &."/ m.

1/. A coaial cable:A. Eeeps the signal confined.!. adiates efficiently.C. ;ors well as a transmittingantenna.


55/89

D. Can pic up signals from outside.20. An ad)antage of fiberoptics o)er cablecommunications is:

A. +ore sensiti)ity to noise.!. 'mpro)ed antenna efficiency.C. (igher 3 output.D. #impler and easier maintenance.


56/89

Ch&pter 05 !&t& re(ept$on1. The reflected wa)e in a radio signal:

A. Tra)els less distance than thedirect wa)e.!. Tra)els -ust as far as the directwa)e.C. Tra)els farther than the directwa)e.D. +ight tra)el less far than$ -ustas far as$ or farther than the

direct wa)e.2. The reflected wa)e:

A. Arri)es in phase with the directwa)e.!. Arri)es out of phase with thedirect wa)e.C. Arri)es in a )ariable phasecompared with the direct wa)e.D. 's horiontally polaried.

". The ionospheric layer that absorbsradio wa)es is:

A. The D layer.!. The 5 layer.

C. The 3 layer.D. 6o layers e)er absorb radiowa)es.

4. The highest layer of the ionosphere is:A. The D layer.!. The 5 layer.C. The 3 layer.D. Dependent on the time of day andthe solar cycle.

*. adio wa)es that cur)e earthward in thelower atmosphere are being affected by:

A. Troposcatter.!. The D layer.C. 'onospheric ducting.

D. Tropospheric bending.&. #inglesideband can be demodulated by:

A. An en)elope detector.!. A diode.C. A !3 and mier.D. A ratio detector.

,. A diode and capacitor can be used todetect:

A. C;.!. A+.C. ##!.D. 3#E.

%. The #F6K6 ratio is a measure of.

A. #ensiti)ity.!. #electi)ity.C. Dynamic range.D. Ad-acentchannel re-ection.

/. The ability of a recei)er to perform inthe presence of strong signals is aconse?uence of its:

A. #ensiti)ity.!. 6oise figure.C. Dynamic range.D. Ad-acentchannel re-ection.

10. A recei)er that responds to adesired signal$ but not to one )erynearby in fre?uency$ has good:

A. #ensiti)ity.!. 6oise figure.C. Dynamic range.D. Ad-acentchannel re-ection.

11. An A+ recei)er can be used todemodulate 3+ by means of:

A. 5n)elope detection.

!. 8roduct detection.C. #lope detection.D. 8ulse detection.

12. An 3+ detector with builtinlimiting is:

A. A ratio detector.!. A discriminator.C. An en)elope detector.D. A product detector.

1". Timedi)ision multiple is oftendone with:

A. A+.!. 3+.

C. 3#E.D. 8+.14. A continuously )ariable signal isreco)ered from a signal ha)ingdiscrete states by:

A. A ratio detector.!. A DKA con)erter.C. A product detector.D. An en)elope detector.

1*. Digital modulation is superior toanalog modulation in the sense that:

A. Analog signals ha)e discretestates$ while digital ones )arycontinuously.

!. Digital signals resemblenoise less than analog ones.C. Digital signals are easier touse with 3+.D. Digital signals ha)e greaterbandwidth.

1&. A product detector would mostoften be used to recei)e:

A. A+.!. C;.C. 3+.D. 6one of the abo)e.

1,. To recei)e @(3 signals on a

shortwa)e recei)er$ you would need:A. A heterodyne detector.!. A product detector.C. An up con)erter.D. A down con)erter.

1%. 'mage re-ection in a superhetrecei)er is enhanced by:

A. 3rontend selecti)ity.!. A product detector.C. A )ariable 9.D. A sensiti)e '3 amplifierchain.


57/89

1/. A low '3 is not practical with asinglecon)ersion recei)er because:

A. 8roduct detection cannot be used.!. The image fre?uency would be tooclose to the incomingsignalfre?uency.C. #ensiti)ity would be impaired.D. Ad-acentchannel re-ection wouldbe poor.

20. Digital signal processing can be used

to ad)antage with:A. ##!.!. ##T


58/89

Ch&pter 0" Inte%r&te ($r(u$ts &n &t&stor&%e me$&1. !ecause of the small sie of 'Cscompared with e?ui)alent circuits madefrom discrete components:

A. +ore heat is generated.!. (igher power output is possible.C. (igher switching speeds areattainable.D. 3ewer calculations need be done

in a gi)en time.2. ;hich of the following is not anad)antage of 'Cs o)er discrete components=

A. (igher component density.!. 5ase of maintenance.C. reater power capability.D. 9ower current consumption.

". 'n which of the following de)ices wouldyou be least liely to find an integratedcircuit as the main component=

A. A radio broadcast transmittersfinal amplifier.!. A noteboo computer.

C. A batterypowered calculator.D. A lowpower audio amplifier.4. ;hich type of component is generallynot practical for fabrication in an 'C=

A. esistors.!. 'nductors.C. Diodes.D. Capacitors.

*. An op amp usually employs negati)efeedbac to:

A. +aimie the gain.!. Control the gain.C. Allow oscillation o)er a wideband of fre?uencies.

D. 6o p amps do not employnegati)e feedbac.

&. A channel carries se)eral signals atonce. ;hich type of 'C might be used toselect one of the signals for reception=

A. An op amp.!. A timer.C. A comparator.D. A multipleerKdemultipleer.

,. ;hich type of 'C is used to determinewhether )oltage le)els are the same ornot=

A. An op amp.

!. A timer.C. A comparator.D. A multipleerKdemultipleer.

%. ;hich type of digital 'C is leastsusceptible to noise=

A. Transistortransistor logic.!. !asecoupled logic.C. 5mittercoupled logic.D. 6channelcoupled logic.

/. ;hich of the following is not anad)antage of C+#=

A. elati)e immunity to noisepulses.

!. 9owcurrent re?uirements.C. Ability to wor at high speed.D. Ability to handle high powerle)els.

10. An absolute limit on 'C componentdensity is:

A. The current le)els needed.!. The maimum attainableimpedance.C. The sie of the semiconductor

atoms.D. 6o There is no limit oncomponent density.

11. 'n a +:A. 'ts easy to get data out andput it in.!. 'ts hard to get data out$but easy to put it in.C. 'ts easy to get data out$but hard to put it in.D. 'ts hard to get data out orput it in.

12. 'n a A+:

A. 'ts easy to get data out andput it in.!. 'ts hard to get data out$but easy to put it in.C. 'ts easy to get data out$but hard to put it in.D. 'ts hard to get data out orput it in.

1". ;hich of the following 'C typesmust be physically remo)ed from thecircuit to ha)e its memory contentschanged=

A. 558+. !. 58+.C. +. D. A+.

14. A ilobyte is:A. 5?ui)alent to a no)el.!. About 1$000 bytes.C. About 1$000$000 bytes.D. 5?ui)alent to about onetypewritten line.

1*. 'n magnetic audio tape:A. The tracs are parallel tothe edges.!. The tracs are diagonal.C. The tracs are perpendicularto the edges.D. The tracs can be oriented at

any angle.1&. 'n magnetic )ideo tape:

A. The )ideo tracs are parallelto the edges.!. The )ideo tracs are diagonal.C. The )ideo tracs areperpendicular to the edges.D. The )ideo tracs can beoriented at any angle.

1,. An ad)antage of magnetic disso)er magnetic tape is:

A. Diss are immune to damage byheat.


59/89

!. Tapes are difficult to rewind.C. Diss allow faster data storageand retrie)al.D. Diss are immune to eternalmagnetic fields.

1%. A typical audio recording tapethicness is:

A. 0.001 mil.!. 0.01 mil.C. 0.1 mil.

D. 1 mil.1/. Compact diss HCDsI are not generallyused for recording:

A.


60/89

Ch&pter 0 Ee(tron tubes1. ne difference between a triode and an6channel 35T is that:

A. Triodes wor with lower )oltages.!. Triodes are more compact.C. Triodes need more )oltage.D. Triodes dont need filaments.

2. The control grid of a tube correspondsto the:

A. #ource of an 35T.

!. Collector of a bipolartransistor.C. Anode of a diode.D. ate of an 35T.

". The intensity of the electron flow in a)acuum tube depends on all of thefollowing e(cept:

A. The gate )oltage.!. The power supply )oltage.C. The grid )oltage.D. The )oltage between the cathodeand the plate.

4. ;hich type of tube maintains constant

)oltage drop with changes in current=A. A triode.!. A gasfilled regulator.C. A tetrode.D. A pentagrid con)erter.

*. 'n a tube with a directly heatedcathode:

A. The filament is separate from thecathode.!. The grid is connected to thefilament.C. The filament ser)es as thecathode.D. There is no filament.

&. 'n a tube with a cold cathode:A. The filament is separate from thecathode.!. The grid is connected to thefilament.C. The filament ser)es as thecathode.D. There is no filament.

,. A screen grid enhances tube operationby:

A. Decreasing the gain.!. Decreasing the plate )oltage.C. Decreasing the gridtoplate

capacitance.D. 8ulling ecess electrons from theplate.

%. A tube with three grids is called a:A. Triode.!. Tetrode.C. 8entode.D. (eode.

/. A tube type radio recei)er:A. 's buly and hea)y.!. e?uires low )oltage.C. 's more sensiti)e than atransistoried radio.

D. All of the abo)e.10. An ad)antage of a groundedgridpower amplifier is:

A. 5cellent sensiti)ity.!. (igh impedance.C. 9ow noise.D. ood stability.

11. A heptode tube has:A. Two grids.!. Three grids.

C. 3i)e grids.D. #e)en grids.

12. The electron gun in a CT isanother name for its:

A. Cathode.!. Anode.C. Control grid.D. #creen grid.

1". The electron beam in anelectrostatic CT is bent by:

A. A magnetic field.!. An electric field.C. A fluctuating current.

D. A constant current.14. The horiontal displacement on anoscilloscope CT screen is usuallymeasured in:

A. 3re?uency per unit di)ision.!. Current per unit di)ision.C. Time per unit di)ision.D.


61/89

C. The bunchingup of the electrons.D. The shapes of the ca)ities.

1/. A lystron is noted for its:A. #piralling electrons.!. 9ow noise output.C. (igh achie)able output power.D. +agneticfield intensity.

20. 'n a multica)ity lystron$ theelectrons:

A. (a)e )ariable speed.

!. Tra)el in circles.C. Are reflected by the ca)ities.D. Are drawn out )ia the cathode.


62/89

Ch&pter 4 B&s$( $%$t& pr$n($pes1. The )alue of the decimal number 2" inbinary form is:

A. 1011.!. 110111.C. 10111.D. 11100.

2. The binary number 110001 represents thedigital number:

A. 4/.

!. 2*.C. 21.D. 1".

". The fifth digit from the right in abinary number carries a decimal )alue of:

A. &4.!. "2.C. 24.D. 1&.

4. The largest possible decimal numberthat can be represented by si binarydigits HbitsI is:

A. 2*&.

!. 12%.C. &4.D. &".

*. ;hich of the following )oltages couldnormally represent a 1 in positi)e logic=

A. 0 is low$ what isthe state of Q 6T >=

A. There is not enoughinformation to tell.!. 9ow.C. (igh.D. This logic statement maes nosense.

11. A logic circuit has four inputs ;$Q$ >$ and B. (ow many possible input

combinations are there=A. 4.!. %.C. 1&.D. "2.

12. Data sent along a single line$ onebit after another$ is called:

A. #erial.!. #ynchronous.C. 8arallel.D. Asynchronous.

1". 'f Q F 1 and > F 1$ then Q F >B is:A. Always 0.

!. 0 if B F 0$ and 1 if B F 1.C. 1 if B F 0$ and 0 if B F 1.D. Always 1.

14. 'f Q F 0 and > F 1$ then QH> S BIis:

A. Always 0.!. 0 if B F 0$ and 1 if B F 1.C. 1 if B F 0$ and 0 if B F 1.D. Always 1.

1*. An ad)antage of a UE o)er an #flipflop is that:

A. The UE flipflop is faster.!. The UE can attain morestates.

C. The UE always haspredictable outputs.D. 6o An # flipflop issuperior to a UE.

1&. 'n positi)eedge triggering$ thechange of state occurs when:

A. The pulse le)el is high.!. The pulse le)el is going fromhigh to low.C. The pulse le)el is going fromlow to high.D. The pulse le)el is low.

1,. The inputs of an # flipflop are

nown as:A. 9ow and high.!. Asynchronous.C. #ynchronous.D. #et and reset.

1%. ;hen both inputs of an # flipflop are 0:

A. The outputs stay as they are.!. F 0 and F F 1.C. F 1 and F F 0.D. The resulting outputs can beabsurd.


63/89

1/. ;hen both inputs of an # flipflopare 1:

A. The outputs stay as they are.!. F 0 and F F 1.C. F 1 and F F 0.D. The resulting outputs can beabsurd.

20. A fre?uency synthesier maes use ofA. An gate.!. A di)ider.

C. The octal numbering system.D. The headecimal numbering system.


64/89

TestF P&rt Three1. 'n a -unction 35T$ the controlelectrode is usually the:

A. #ource.!. 5mitter.C. Drain.D. !ase.5. ate.

2. A diode can be used as a fre?uency

multiplier because of its:A. Uunction capacitance.!. 6onlinearity.C. A)alanche )oltage.D. 3orward breao)er.5. Chargecarrier concentration.

". ;hich of the following is not a commonform of data transmission=

A. 8arallel modulation.!. 3re?uency modulation.C. Amplitude modulation.D. 8hase modulation.5. 8ulse modulation.

4. A )ery brief$ high)oltage spie on anac power line is called:A. A surge.!. An arc.C. A transient.D. An a)alanche.3. A clamp.

*. ;hich of the following is notcharacteristic of an oscillator=

A. 6egati)e feedbac.!. ood outputtoinput coupling.C. easonably high transistor gain.D. Ac output.5. @sefulness as a signal generator.

&. ;hich layer of the ionosphere absorbsradio signals below about , +( during thedaylight hours=

A. The 3 layer.!. The 5 layer.C. The D layer.D. The C layer.5. The ! layer.

,. The beta of a bipolar transistor isits:

A. Current amplification factor.!.


65/89

5. 'mpossible to determine from thisdata.

1,. ;hen both 6channel and 8channeltransistors are found in a metaloidesemiconductor type integratedcircuit$ the technology is nown as:

A. Transistortransistor logic.!. C+#.C. !ipolar logic.D. 6868.

5. 8686.1%. A commonbase circuit is commonlyemployed as:

A. A microwa)e oscillator.!. A lowpass filter.C. A noise generator.D. A phaseloced loop.5. A radiofre?uency poweramplifier.

1/. ;hich of the following de)ices alwaysuses an 'C as one of its main acti)ecomponents=

A. A radiofre?uency power

amplifier.!. A digital computer.C. A lowle)el audio amplifier.D. A power transformer.5. An impedance matching networ.

20. ;hich type of amplifier circuitpro)ides the greatest efficiency=

A. Class A.!. Class A!.C. Class !.D. Class C.5. Any of the abo)e can be asefficient as any other.

21. A#C'' is a form of:

A.


66/89

"2. 'n a 868 bipolar transistor:A. The collector is positi)erelati)e to the emitter.!. The collector is at the same)oltage as the emitter.C. The collector is negati)erelati)e to the emitter.D. The collector might be eitherpositi)e or negati)e relati)e to theemitter.

5. The collector must be at groundpotential."". 'n a cathoderay tube HCTI$ the termelectrostatic deflection means:

A. The de)ice is not woringcorrectly.!. #tatic electricity is distortingthe image.C. The beam is bent by an electricfield.D. The beam is bent by coilscarrying a )ariable current.5. 6othing There is no such thing

as electrostatic deflection in aCT."4. ;hich type of modulation consists ofone )oice sideband$ with a suppressedcarrier=

A. A+.!. ##!.C. 3+.D. TT>.5. 8C+.

"*. A type of electron tube that can beused to generate microwa)e energy is:

A. A triode.!. An oscillotron.

C. A cathoderay tube.D. A )ideotron.5. A magnetron.

"&. 'n an A6D gate$ the output is high:A. 'f any input is high.!. nly when all inputs are low.C. 'f any input is low.D. nly when all inputs are high.5. nly when the inputs ha)eopposite logic states.

",. A )oltagecontrolled oscillator maesuse of:

A. A )aractor diode.

!. A Bener diode.C. 6egati)e feedbac.D. A split capacitance.5. Ad-ustable gate or base bias.

"%. ;hich of the following is not anad)antage of a transistor o)er a )acuumtube=

A. #maller sie.!. 9ighter weight.C. 9ess heat generation.D. 9ower operating )oltages.5. (igher powerhandling capacity.

"/. An amplifier has an output signal)oltage that is "* times the inputsignal )oltage. This is a gain of:

A. 1* d!.!. "1 d!.C. "* d!.D. "*0 d!.5. ,00 d!.

40. 'n an eclusi)e gate$ theoutput is high:

A. 'f any input is high.!. nly when all inputs are low.C. 'f any input is low.D. nly when all inputs are high.5. nly when the inputs ha)eopposite logic states.

41. A ratio detector is a circuit fordemodulating:

A. A+.!. 8+.C. 3+.D. ##!.5. A3#E.

42. 'n a radiofre?uency poweramplifier using a )acuum tube$stability can be enhanced by using acircuit in which the followingelectrode is at 3 ground potential:

A. The cathode.!. The plate.C. The filament.D. The control grid.5. The screen grid.

4". A method of modulation in whichthe strength of pulses )aries iscalled:

A. 8ulse amplitude modulation.

!. 8ulse position modulation.C. 8ulse fre?uency modulation.D. 8ulse ratio modulation.5. 8ulse width modulation.

44. !oolean algebra is:A. Uust lie ordinary algebra.!. A useful tool in digitallogic circuit design.C. @sed to calculate the )alueof an unnown.D. @sed with negati)e logic only.5. @sed with positi)e logic only.

4*. A )oltagedoubler power supply is

best for use in:A. Circuits that need lowcurrent at high )oltage.!. 9ow)oltage de)ices.C. (ighcurrent appliances.D. All inds of electronice?uipment.5. !roadcast transmitter poweramplifiers.

4&. An optoisolator consists of:A. Two Bener diodes bac to bac.!. An 95D and a photodiode.C. Two 686 transistors in series.


67/89

D. An 686 transistor followed by a868 transistor.5. A 868 transistor followed by an686 transistor.

4,. ;hen a semiconductor is re)ersebiasedwith a large enough )oltage$ it willconduct. This is because of:

A. !ias effect.!. A)alanche effect.C. 3orward breao)er.

D. An ecess of charge carriers.5. Conduction effect.

4%. #ynchroniing pulses in a )ideosignal:

A. Eeep the brightness constant.!. Eeep the contrast constant.C. Eeep the image from tearing orrolling.D. 5nsure that the colors are right.5. Eeep the image in good focus.

4/. 'n an enhancementmode +#35T:A. The channel conducts fully withero gate bias.

!. The channel conducts partiallywith ero gate bias.C. The channel conducts ac but notdc.D. The channel conducts dc but notac.5. The channel does not conduct withero gate bias.

*0. 'n a stepup power transformer:A. The primary )oltage is more thanthe secondary )oltage.!. The secondary )oltage is morethan the primary )oltage.C. The primary and secondary

)oltages are the same.D. The secondary must be centertapped.5. The primary must be centertapped.

A good score is at least ", correct.Answers are in the bac of the boo. 'tsbest toha)e a friend chec your score the firsttime$ so you wont memorie the answers ifyou want to tae the test again.


68/89

Ch&pter 41 A(oust$(s= &u$o= &n h$%h f$e$t+1. Acoustics is important in the design of:

A. Amplifier power supplies.!. #peaer enclosures.C. Cables that connect components of ahifi system together.D. raphic e?ualiers.

2. 5lectromagnetic interference to a hifiamplifier can be caused by:

A. A nearby radio broadcast station.!. 'mproperly designed recei)ing

antennas.C. 5cessi)e utility )oltage.D. 'mproper balance between the left andright channels.

". The midrange audio fre?uencies:A. Are halfway between the lowest andhighest audible fre?uencies.!. epresent sounds whose )olume le)elsare not too loud or too soft.C. Are abo)e the treble range but belowthe bass range.D. Are between approimately 0.2 and 2(.

4. An indoor concert hall such that soundreaches e)ery listeners ears perfectly at all

audio fre?uencies re?uires:A. A suspended ceiling with acousticaltile completely co)ering it.!. 6umerous baffles on the walls andceiling.C. A le)el of engineering beyondreasonable epectation.D. A)oidance of ecessi)e bacgroundnoise.

*. A sound )olume change of F" d! represents:A. A doubling of acoustic power.!. A threefold increase in acousticpower.C. A tenfold increase in acoustic power.D. 6o change in acoustic power.

&. A sound whose wa)elength is & in in the airhas a fre?uency of:

A. **0 (.!. 1100 (.C. 2200 (.D. 't is impossible to calculate fromthis information.

,. A sound wa)e that tra)els at ""* m persecond has a fre?uency of:

A. ""* (.!. ""*0 (.C. "".* (.D. 't is impossible to calculate fromthis information.

%. The relati)e phase of two acoustic wa)es$ as

they arri)e at your ears$ can affect:A. (ow loud the sound seems.!. The direction from which the soundseems to be coming.C. !oth A and !.D. 6either A nor !.

/. 'n an acoustic sine wa)e:A. The fre?uency and phase areidentical.!. The sound power is in)erselyproportional to the fre?uency.C. The sound power is directlyproportional to the fre?uency.

D. All of the sound power isconcentrated at a single fre?uency.10.


69/89

!. Con)erts sound wa)es to fluctuatingelectric current.C. Con)erts audiofre?uency currents toa fluctuating magnetic field.D. Con)erts direct current to audiofre?uency currents.

1%. An audio mier:A. Cannot match impedances.!. Cannot mae an amplifier morepowerful.C. ;ill eliminate 5+'.

D. Allows a microphone to be used as aspeaer.

1/. ;hich of the following media or de)ices usedigitaltoanalog con)ersion=

A. A CD player.!. A speaer.C. A microphone.D. A )inyl dis.

20. 8hase ?uadrature is sometimes used to:A. 'ncrease the output from amicrophone.!. educe the susceptibility of a hifisystem to 5+'.C. Create the illusion of fourchannelstereo when there are really only two

channels.D. Con)ert an analog signal to a digitalsignal$ or )ice)ersa.


70/89

Ch&pter 40


71/89

1,. An ad)antage of con)entional hardwired telephone o)er cellular is:

A. 8ri)acy.!. 8ortability.C. 5ase of use in a car.D. 9A6 topology.

1%. An ad)antage of cellular o)ercon)entional hardwired telephone is:

A. #ecurity.!. 9ower cost.

C. +obility.D. Data speed.

1/. 'nfrared wa)es are:A. 9onger than radio wa)es.!. 9onger than )isiblelight wa)es.C. #horter than )isiblelight wa)es.D. 'naccurately named7 they arereally heat rays.

20. The 8# might be useful:A. 3or impro)ing the performance ofa 9A6.!. 3or increasing the data speed ina wireless system.

C. 3or minimiing noise in awireless system.D. To a motorist who is lost.


72/89


73/89

!. #omeone who wors with animatedgraphics.C. #omeone who needs to print hugetet documents.D. #omeone who needs top?ualityprintouts.


74/89

Ch&pter 47 -obot$(s &n &rt$f$($&$nte$%en(e1. An android taes the form of:

A. An insect.!. A human body.C. A simple robot arm.D. !inocular )ision.

2. According to Asimo)s three laws$ underwhat circumstances is it all right for arobot to in-ure a human being=

A. 6e)er.!. ;hen the human being specificallyre?uests it.C. 'n case of an accident.D. 'n case the robot controller isinfected with a computer )irus.

". #econdgeneration robots first wereused around the year:

A. 1/*0.!. 1/&0.C. 1/,0.D. 1/%0.

4. The etent to which a machine )ision

system can differentiate between twoob-ects is called the:A. +agnification.!. #ensiti)ity.C. #electi)ity.D. esolution.

*. An automoti)e robot might best eepitself tra)eling down a specific lane oftraffic by using:

A. !inaural hearing.!. 5pipolar na)igation.C. 5dge detection.D. A secondgeneration end effector.

&. A rulebased system is also nown as:

A. Artificial intelligence.!. An epert system.C. An analytical engine.D. An automated guided )ehicle.

,. A robot that has its own computer$ andcan wor independently of other robots orcomputers$ is called an:

A. Android.!. 'nsect robot.C. Automated guided )ehicle.D. Autonomous robot.

%. A manipulator is also nown as a:A. Trac dri)e.

!. obot arm.C.


75/89

with filters that allow which three colorsof light to pass=

A. !lue$ red$ and yellow.!. !lue$ red$ and green.C. Cyan$ magenta$ and yellow.D. range$ green$ and )iolet.

20. A robot can determine the steepness ofa slope using aHnI:

A. 5pipolar na)igation system.!. Clinometer.

C. 5nd effector.D. +anipulator.


76/89


77/89

!. The amplifier used by a band at aroc concert.C. A meter for measuring soundintensity.D. A robot controller.5. A 8# recei)er.

1&. ne ilobyte is the same amount ofdata as:

A. 1024 bits.!. 1024 ilobits.

C. 1024 megabits.D. 1024 gigabits.5. 6one of the abo)e.

1,. (eaphonic sound is not common$ but ifit were$ it would most liely be used for:

A. True threedimensional hifiaudio reproduction.!. Twoway radio communications.C. 5nsuring that an A+K3+ tuner canrecei)e at least si stations.D. 'mpro)ing the dynamic range of aspeaer system.5. obot control.

1%. ange sensing and range plotting arebasically the same thing ecept for the:A. 9ightdetecting sensiti)ity.!. 'mage resolution.C. #electi)ity.D. ;a)elength at which the systemfunctions.5. 6umber of dimensions in)ol)ed.

1/. 'n a componenttype hifi system$cables connecting the )arious units shouldbe:

A. As long as possible.!. #ingleconductor only.C. Connected in parallel.

D. #hielded whene)er possible.5. Connected in series.

20. A radio antenna recei)es *0 watts of3 power from a transmitter$ and radiates4/ watts of that power into space. ;hichof the following statements is true=

A. The antenna is /% percentefficient.!. The loss resistance is 1 ohm.C. The loss resistance is 1 percent.D. The ground loss is 1 watt.5. The antenna feed line loss is 1watt.

21. The technical epression for robotarm-oint fleibility is:

A. Degrees of rotation.!. adians of rotation.C. Degrees of fleibility.D. +anipulator fleibility.5. The wor en)elope.

22. 'n an 'nternet connection$ therecei)ing computer is also nown as the:

A. #er)er.!. (ost.C. 8eer.D. 6ode.

5. Destination.2". The term refres- rate refers to:

A. The number of times persecond that an image is renewedin a computerdisplay.!. The number of times persecond that a computer memorycontents change.C. The speed at which files on a

hard dri)e are o)erwritten.D. The number of bits per secondtransferred in an 'nternetconnection.5. The time it taes to rechargea nicelcadmium electrochemicalcell.

24. The LbrainM of a computer is the:A. (ard dri)e.!. Controller.C. +icroprocessor.D. CD+.5. +onitor.

2*. n a computer hard dri)e$ thecircular tracs are broen into arcscalled:

A. Clusters.!. !ytes.C. #ectors.D. Di)isions.5. #torage units.

2&. A robot arm mo)es in threedimensions according to a polarcoordinate schemewith a linear ele)ation dimensionadded. This is called:

A. #pherical coordinate geometry.

!. ectangular coordinategeometry.C. Cartesian coordinate geometry.D. Concentric coordinategeometry.5. Cylindrical coordinategeometry.

2,. 'n a )olatile memory chip:A. The stored data is retainede)en when power is remo)ed.!. The stored data )anishes whenpower is remo)ed.C. The stored data capacity is

greater than that of a harddri)e.D. The stored data capacitydeclines with the passage oftime.5. The reliability hasdeteriorated and the chip shouldbe replaced.

2%. At low )olume le)els in an audioamplifier system$ the dynamic range islimited primarily by the:

A. 'nput impedance.!. 5fficiency.


78/89


79/89

C. 3luctuating electric and magneticfields.D.


80/89

>$n& E/&m1. As the fre?uency of ac increases in acoil$ the reactance:

A. ets larger negati)ely.!. ets smaller negati)ely.C. #tays the same.D. ets larger positi)ely.5. ets smaller positi)ely.

2. A beatfre?uency oscillator is usefulfor:

A. enerating 3+.!. Detecting 3+.C. enerating C;.D. Detecting C;.5. Any of the abo)e.

". A Colpitts circuit is a form of:A. Amplifier.!. Detector.C. +odulator.D. scillator.5. ectifier.

4. The high component density ofintegrated circuits acts to:

A. +aimie the power output.!. 'ncrease the current drain.C. 'ncrease the )oltagere?uirements.D. 'ncrease the operating speed.5. educe the fre?uency range.

*. A utility meter generally measures:A. ;atts.!. Amperes.C. Eilowatt hours.D. Eilowatts.5.


81/89

1,. 'n an A+ )oice signal$ the audioinformation is:

A. 5actly at the carrier fre?uency.!. Contained in sidebands.C. At harmonics of the carrierfre?uency.D. ectified before being impressedonto the carrier.5. Detected before being impressedonto the carrier.

1%. The oscillating fre?uency of a ?uartcrystal can be )aried slightly by:

A. Changing the bias on thetransistor.!. Changing the )oltage across the)aractor.C. e)ersing the power supplypolarity.D. 8lacing a small )ariablecapacitor across the crystal.5. 6o. The fre?uency of a crystalcannot be changed at all.

1/. ;hen se)eral resistances are connected

in series

GIBILISCO.doc

Documents

Transcript of GIBILISCO.doc