Irish ARRL RSGB Practice Paper PP2v4All

7/28/2019 Irish ARRL RSGB Practice Paper PP2v4All

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QADV Practice Paper 2for the RCF Advanced Level Examin Radio CommunicationsVersion 4This exam consists of a single paper with 62 questionsYou will need a copy of the Licencebandplans far Zm and ZCmforrnula sheetcalculatorblue or black pensTry to set aside 2 hours when you will not be distracted byphone calls, pets, children, cups of tea.Before you begin, visit the loo.For each guestion, put a tick in the I j by the correct answer.Make sure your tick does not cover two boxes.If you change your mind, scribble over the box with the firsttick; then tick the carrect box.Calculations can be done on the back of this question paper.1 Go through the whole paper,answering all the questions you are sure of.2 Go thncugh the paper a second time,Think about each remaining question and answer lt ifyou can.3 Go through the paper a third time.For each question that is still unanswered,etiminate any options that you know are wrong;then make an intelligent gums at the correct answer.Each question carries one mark.Marks are not deducted for wrong anslilers.5o do not leave any guxtions unanswered.4 Check yourcalcutations.5 Look over your answers until time is up.Start time _ Duration 2 hours End time_Sources of the reference material needed for the Exam (Licence,bandplans, formulas) can be found athttp ://freespace. virgin. netlmu rray. g3kzbThis website also gives details of other Practice papers.G3KZB @ 2012 qADVPPZ version 4


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1 A Licensee may append the suffix'/P'to the t What frequency bands are available to a Fullcallsign when operating UK Licensee operating $ttM in internationalwaters?A t I with hand-held equipment A [ ] The bands al]$atd for use in the UK.B [ ] frcm a temporary l*c*tion B [ ] The top l*kHz ofeach band inC [ ] away from mains pswer Schedule I of S]e Ucence.D t I frorn a parked vehicte C { i The bands a}located by the ITU in theregion where the vessel is located.

D t I The bands set aside by the ITU for/MM operations.2 In which of the fcllowing happenings rnaya Licensee use the Radio Equipmeat to assistcommunications?In times of (1) national emergenry 6 \,Vhich of the following conditions apFly to(2) international emergenqf messages sent by UK Amateurs?(3) disaster (t) They must be in English(2) They must be un-encryPtedA t I t1) and (2) onty. (3) They must be free of menaceB i I {1} a*d {3} only. A I I (1) and (2) only.C i I tz) a*d {3} only. B t j (1} and {3) only.D I i AII three of them. C t ] (2) and (3) only.

D I I All three of them.3 If the Lieensee ccntr*is the equipment. underwhat eircurnsta*ces rtay a non*licensed

person talk into the microphone? , ttlthich one of the fsllowlng restrictions appliesto the Remote Control of Radio Equlpnnent byA [ ] U*der n* circumstances. a Full Licence holder?B [ ] Only if the Licensee holds a A I J fhe control signal must not exceedFuli Licence. 0.5 watts in Power.C t ] Only if the Licensee holds a B I J It must not allow other AmateursIntermediate or Full Licence. unsupervised use of the Equipment.D [ ] If the Licencee holds any UK C t I It must only be used with a ClubAmateur Radic Licence. callsign.

D I I A Hotice of Variatian to the Licencernust be obtained for Ofcom.4 When must a'Maritime Mobile'operationcease? a The callsign given in the Licence, togetherA I I If the vessel is carrying flammable with a Regional Secondary Location ifcargo. appropriate, must be transmitted at intervalsnot exceedingB [ ] When entering harbour or canal. At I l0minutesC I I In a designated danger area. B[ ] l5minutesD I I On the instruction of the vessel'smaster. C[ ] 30minutes

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The frequenry of a transmission must be asstable asA t I technical development reasonablypermitsBI ] 1partin1OO,00OC [ ] required by a duly authorized officer

of OfcomD t I necessary to prevent undueinterference to users on adjacentfrequenclesttYhich one of the following bands has anallocation to the Amateur Satellite Service?AI I 1'810 * Z'oo0MHz.B[ ] 3.sO0 - 3.sO0MHz.Ct j 50.00 -- 52.00MH2.Dt I 144.0 - 145.0MH2.

Rr :oos:R2

In this figure, what value of Rz will make thevoltage at the junction of Rr and R2 3V?

What is the phase difference between thevoltage and current shown on this graph?

15

A[ ] 90"Bt I 18O"

A[ J 5:1B[ ] 2o:1

ct I 2?ooDt I 360o

ct I 250:1Dt I 5oo:1

11

A I I 100ka.B [ ] 200ka. c t I 300ka.D t I 400kQ.

CI I tzefDt I 15pf

C t ] 9OmsecsDt I l2omsecs ?pzpasei

Which capacitor decouples this amplifier fromthe rest of the circuit?A[ ] Ca C[ ] CcB[ 1 Cb D[ ] CdWhich one of the following is decreas.ed if adamping resistor is added tc a resonantcircuit?A t I Bandwidth.Bt I Qfactor.C I ] Resonantfrequency.D t ] Phaseangle.A 15 ohm loudspeaker is driven frsm a6,000 ohm source.What ratio of transformer is required?

162

:l20pf 60pf

{Hl--The combined capacitance of these twocapacitors in series isA[ ] spfBt I 10pfA t I 3OmsecsB [ ] 60msecs

13 A circuit consisting of a resistor and inductorin series has a time constant of 12msecs.After voltage is applied, the final value of thecurrent will be reached after approximately

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The cut-off frequency of a low-pass filter isdefined as the frequenry at which the outputvoltage has fallen toA I I 0.404 of its maximum valueB [ ] 0.5O5 of its maximum valueC t j 0.606 of its maximurn valueD t I 0-707 of its maximum value

19 The power gain of an amplifier is gdB.By how maay times is the po!iler increased?This is the circuit of aA I I bufferamplifierB I I freque*cysynthesiserC[ ] crystalsscillatorD t j variable freq**ary +sciliatorWithin a transmitter, a modulated signal isproduced on 5,0 MHz.To give an output on 80m (3.5 to 3.8 MHz),it is mixed with a synthesiser signal on10.0 to 10'3 MHz.Also produced (and filtered out) is anunwanted mixer product onA i I 6.5 to 6.8 MHzB I I 15.0 to 15.3 MHzC t I ?3'5 to 23.8 MHzB I I 32.0 to 32.3 MHzThe bandwidth of an amateur AM signal isapproximatelyAI I 1.5kHzB[ ] 3kHzCl I 6kHzDl ] 12kHzFrom which part of a triode valve areelectrons emitted?A t I Anode.B [ ] Grid.C t I Cathode.D t I Heater.

AI I Stimes.Bt I 12times.Ct I lBtimes.DI IZ7times.

If the reverse bias on a varicap diode isi*creased, thenA [ ] the depletion layer is widened andthe capacitance is increasedB [ ] the depletion layer is narowed andthe capacitance is increasedC [ ] the depletian layer is widened andthe capacitance is decreasedD I I the depletion layer is narrcwed andthe capacitance is decreased

21 In which class of transistor amplifier does 25coltector current flow all the time thatvotrtage is applied?At I CIassA. Ct I ClassB"B[ J ClassAB. DI ] ClassC.If the smoothing capacitor in a halfrwaverectifier circuit is in increased in size, whatwill haBpen to the current through therectifier?

peak current duration of currentAI I increase increaseBI I decrease increaseCt ] increase decreaseDI ] decrease decrease

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27 With which mode of transmission is the fault'chirp' associated?A[ ] Cw.B[ ] AM.c[ ] ssB.*[ ] FM.

28 A notch filter can be used toA [ ] separate the CTCSS sub-audible tonefrom speech e*terirg a repeaterB [ ] reduce excessive bandwidtlr caused byoverdriving a linear amplifierC t ] remove one particular harrnonic fromthe output of a transmitterD t I remove 50 Hz mains hum from anaudio stage

eg From which part of a frequency synthesiser isthe'out-of-lock' indicator obtained?A t I Crystal refere*ce *scillatar.B t I Prcgrarnrnabtedivider.Ci I Phaseccmparator.D I I Voltage controlled oscillator.

30 'SINAD'in a receiver is related to itsA t I selectivityB[ ] dynamicrangeC i I signal to noise ratioDt I imagerejection

31 In a superhet SSB receiver, how is the audioproduced?A t I The IF rnixes with the CIO,B t I The RF mixes with the IF.C t I The LO mixes with the RF.D I I The CIO mixes with the LQ.

32 What happens if two IF coils are over-ccupled?A [ ] An AGC voltage is produced.B [ ] fhe response has a dip at its centre.C [ ] Sensitivity is at a maximum.D I I Self oscillatien accurs.

33 D+ubl* st"rperhet receivers haveA t I a low first IF for image rejection anda high second IF for sel*ctivityB I J a low first IF for selectivity anda high second IF for image rejectionC t I a high first IF for image rejection anda Iaw second IF for sefectivityD t I a high first iF for selectivity anda low second IF for image rejection

As well as altering the gain, the AGC circuitin a receiver can also be used to

A[ ] drivetheSmeterB [ ] change the receiver bandwidthC [ ] irnprove the SWRD I I remeve spikes of interference

35 What d*es the RIT control en a receiver do?A [ ] Varies the receiver bandwidttr.B [ ] Tunes the receiver over a narr*wranlle.C [ ] Limits the peak value of the RF.D t ] Allows particular frequencies to bestored in memory.

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36 4 turns-------4 turns-------- 40

8 turns- -*This is the diagram of aAt I 1:lbalunB I I braid breaker 4r.CI I lFtra*sformerD t I harmonicfilter

37 The feed point impedance of a loaded verticalfive-eights wavelength antenna isapproximatelyAt I 37aB[ ] soa 42c[ ] 73aDI I 300Q

The'roller coaster'form of variable inductoris commonly found inA I I an Antenna Matching UnitB [ ] a Standing Wave Ratio rneterC[ ] anoscilloscopeD t I a transverter {HF tolfrom VHF}Ihe amount of electromagnetic energyfalling on a* area of 1 squara metre iscalled theAI j fieldstrengthB[ ] velocityfactcrC t I power flux densityDt I incidentpowerIonisation in the atmosphere is caused by,q [ ] the earth's magnetic fieldB t I iet streams where the troposphereand stratosphere m*etCt I solarernissionsD t I oyer-the-horizon radars

43 The longest range obtainable by Eround wavepropagation is normally overA t I desertsB{ I seasC [ ] rnountainsDI I r*inforests

44 When a receiver is tuned to Fr a fai*t signalon a higher frequency of Fi can be heard atthe same time.What is the frequency af the local oscillator?Ai I Fi- Fr

38 The'traps'in a HF trap dipole antenna areA t I low pass filtersB I I high pass filtersC [ ] series tuned circuitsD t I parallel tuned circuits

39 Vf and Vr ore the fsrward and reversevoltages measured on a Standing WaveRatio meter.The SWR =p,r: *;#Bf 1 Vf-VrVr*Vr

cr I *:*Vr xVrVr *Vr Ct I Fi *Fr

, Fi*Frtlt l.4 2

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45 Why is an FM signal less likely to causecross-modulation in receivers than otherrnodes of modulation?A [ ] The amplitude of the carrier remainsconstant.B [ ] None of the power [s csntained insidebands.C [ ] It is not possible for an FM signal to beCIver-modulated.D I I The duty cycle of the carrier is small.

46 Tests have shown that a base-emitterjunction in an audio amplifier is acting as arectifier far an RF signal.To cure the interfereftcef tvhich s*e of thefollowing capacitars should be wired acr*ssthe base-emitter leads?A I ] 1nF disc ceramic.B t ] lO0OpF electrolytic.Ci I l0pFpolystyrene.Di I lpFpolyester.

47 In a cable containing two wires, a comrnonmode current flowsA I I in alternate wires on alternate cyclesof ACB I J in both wires but in opposite directionsC i j only in one wireD I I in the sarne direction in both wires

48 If a 2 metre signal is breaking through onto aTV, what should be fitted in the TV dcwnleadto prevent this?A I I Balun.B [ ] Attenuator.CI I Low-passfilter.Dt I High-passfilter.

49 A 40 watt transmitter is feeding an antennawith a gai* cf 6dB through a feeder with a3db loss.What is the field strength 60 metres from theantenna?A t I 1'O4 volts per metre.ts [ ] 2.08 volts per metre.C I I 3.12 volts per metre.D I I 4'?6 volts per metre.

50 In which part of a car's electrics dses inducedRF pose the greatest hazard?A t I Head a*d rcar lights.B [ ] Engine management system.C [ ] Front and rear screen wipers andwashers.D t I In-car broadcast radio.

51 if a Radio Ar*ateur's signals are causingproblems on a neighboufs carnputer and theneighb*ur is not willing t+ c**perate infi*d**g a cilre, the Amate*r should advisehim to contEctAt I RSGBB [ ] OfcemC I I Citizens Advice BureauD i I Trading Standard Department ofthe local council

52 By which ef the f*lt*wi*g $rays can a PacketRadic rylessege reaclr its d*sti*ati*n?(1) directly if withi* range{2) via a mailbox{3} using a digipeaterA I ] (1) and {2) only.B t I (1) and (3) only.C I I (2) and (3) only.D I I All three ways.

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53 What happens when a repeater'times out'? 5? The less RF radiation to which bn adult isexposed the better, and in the ranEe 10 toA I I It is closed down by the Repeater 146 MHz it shoutd never be more tiranKeeper. A t I 14 volts per metreB I J Its Notice af Variation is revokedby Ofcom. B I I 28 votts per metrec t I It transmits the current time in the c i ] 42 volts per metre

format used by MSF. D I I 55 volts per metreD t j It stops re-transrnitting the incomlngsignal.5a In a PME rnains wiring system, the neutralconductor is

54 Intermodulation products generated within a A t j isolated from earthreceiver can be rninimised by B [ ] connectd to earth at theA [ ] turning back the squelch electricity su&tianB [ ] switching in an attenuater C I ] connected to earth where the supp]yenters the houseC t j reduclng the audio output D t I connected to earth at theD t I increasing the IF bandwidth electricity generator

59 How cen a high voltage be rneasured with a55 In which pa* of the 2m band do satellite IOBpA nrovi*g cail meter?cornmunicatians take pl*ce? A t ] tsy onnecti*g a high value resistorA I I 144.000 to 144.11S t*Hz. in parallel with it.B I I 144.400 to 144'49G MHz. B t I By cannecting a low value reststerin parallel with it.C t I 145'200 to t45-5935 $4H2" C t I By connecting a high value resistorD I j 145.800 to 145.BOO MHz" in series with it.

D [ ] By connecting a low value resistorin series with it.56 Why is speciai care needed vrhen dealing withequipment contai ning therrnionic valves? 5{I The ovelall eccuracy of a di*ital frequencyA t j Valves are mechanicalty fragile. csrnter is limited by the

B [ ] Valved equipment centeins high A [ ] number of digits on the displayvoltages. B I J stability of the gate timeC [ ] Large currents are involved. CI j inputimpedanceD I j Replacement valves are n6w difficultto obtain. D I I losses in the probe

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62

What happens when the knob labelled'Y GAIN'on an oscilloscope is turnedanti-clockwise?A I I Each sweep of the trace is slower.B [ ] The whole of the trace rnoves down.C [ ] The height ofthe trace decreases.D t I The trace becomes fainter.

This drawing shows a current transformerasfound in an SWR meter.The earthed braid of the coaxA [ ] reduces eddy currentsB [ ] maxirnises the sensitivityC [ ] prevents voltage flashoverD t I minimises capacitive coupling

End of questions

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QADV Practice Paper 2 KeyAdva*ce! The Full Licence ManualSyllabusI Licencetr

2a.1 Note (d)2b.1 1{3}2c.1 3(4)zd.1 e{5}2e.1 e{6}Zf.! Note {h}2g.7 1s{3}2h.1 13{1}2i.1 7{1Xa}4J Sc*:edule 1Table C3d.13e"53f.339,33h.33i.43j-z3k.13o.13n.3

31 A32833C3443sB36A37838D39C404

IIIi

1B2 D I3B 64 D 75C 76C I789*8B 99A10D10

4r. c42C43844D45A46447D48D494508

2326272830

11 A12D138L4A15D158L7B18D19A20c

515253545556575A5960

2tA22C23C24825C26C2742ac?;9c30c

67,68 4k.L65 4n.263 4n.165 4p.1- 4r.17t 5b.175 5c.377 5c.573 5d.179 5e.180 6a.781 6b.283 6c.190 ?a.L89 7a.294 7a.4- 7b.29!,*2 7b.586 7c.115 7e.1

32329110235

4A 3n.735 3p.147 4b.152 4e.144,61 4f.243 4q.355 4h.257,92 4h.348 4h.661 4j.3x Note the correction to page 9of Advance! 3rd edition given inwww.rsgb,arg/books,fextraladvance.htm

BDDBD

95 7f ,L11 Ba.lL2 8b.189 8c.113 Be.1B \4 9a.4B 16 9d-1c 17,95 9t1C 96 10a"1B 101 1Sb.2

6162 C lOO 10c.1D 98 10e.1

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Irish ARRL RSGB Practice Paper PP2v4All

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