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CLASS TEST-5 SUBJECTS – JET ENGINE SYSTEMBATECH-6 SEM.-IV Total Marks-30Dat-06!0" !#0$5 TIME-%5 MINUTES

1. Anti icing system equipment is designed toprevent?a. Prevent the rain protection

b. Prevent the hot airc. Prevent the turbulence&. 'r()t t* +or,ato) o+ t*

2. In which all components ice may be form?a. ing and tail surfacesb. Pivot and static port openingsc. !uel tan" vents&. All o+ t* a/o(

#. hen the anti icing valve is open then antiicing switch is $$$$$?a. Clos

b. %penc. &oth 'a( ) 'b( are correct.d. *one of the above

+. here the anti icing switch is situated?a. $$ o lok 1osto) ) t* o,1rssor/. 12 o, cloc" position in the compressor. - o, cloc" position in the compressor&. o, cloc" position in the compressor

/. hen the anti icing valve is open the anti icingair to 0ow to the $$$$$$ part of the engine?a. &ac"ward

/. 2orar&c. earwardd. *one of the above

-.  he temperature of the discharge air prevents $$$$$$$$?a. It will not prevent the ice formation that

might threw dumping the engine/. It ll 1r()t t* +or,ato) o+

t*at ,4*t t*r &,1)4 t* )4)c. &oth'a( ) 'b( are correctd. %nly 'a( is correct

3. here the anti icing valve is is mounted?a. At the top of the compressorb. As 'a( or rear casing regulate the 0ow and

pressure of anti icing air. Bot* a7 8 /7 ar orrt.d. *one of the above

4. hat are the main components of anti icingsystem?a. Anti icing valve

b. Anti icing indicator switch. Bot* a7 8 /7 ar orrt.d. *one of the above.

.  he poppet valve regulates the pressure of theanti icing air below?a. #5 psib. 2 psi. #" 1sd. /5 psi

15. he pressure relief valve prevents the pressurein the valve from e6ceeding appro6imately?a. +5 psi/. 35 1sc. +/ psid. // psi

11.hat are the main # basic systems of thermalicing?a. 7ot airb. 7ot oilc. 8lectrical&. All o+ t* a/o(

12.hat is the disadvantage of inta"e anti icingsystem?a. 9oss of powerb. 9oss of mass. Loss o+ )4) 1or

d. 9oss of rpm

1#.7ow to correct the loss of engine power ininta"e anti icing system?a. It can be corrected for ground runb. As in 'a( and power chec". Bot* a7 8 /7 ar orrt.d. *one

1+.hen the valve is open the pressure of the antiicing air causes that set of contacts to closethus completing $$$$ volt circuit that activatesthe indicator in the aircraft coc"pit?

a. #5 volt/. #" (oltc. +5 voltd. 2 volt

1/. he discharge air passes from the manifoldthrew a port in the front gear bo6 casing and?a. %utlet guide vaneb. Inlet guide vanec. &oth are correct

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&. 9)l: /7 s orrt

1-.:ar" the correct statement regarding anti icingsystem in ;et enginea. Anti icing system direct compressor

discharge air into the strut of thecompressor front frame the inlet guidevane and the <rst stage compressor vanes

b. hen the anti icing control switch is closedthe anti icing valve is open

. Bot* a7 8 /7 ar orrt.d. *one of the above

13. :ar" the wrong statementa. hen the anti icing control switch is open

the anti icing valve is open/. hen the anti icing control switch is closed

the anti icing valve is open. hen the anti icing control switch is closed

the anti icing valve is closed&. Bot* a7 8 7 ar ro)4

14.here the anti icing boots are located in theaircraft?a. railing edge of the wing/. La&)4 &4 o+ t* )4c. ail positiond. *one of the above

1. hat material is used to ma"e the anti icingboots?a. Plasticb. ood. ;//rd. *one of the above

25.here the anti icing switch is situated inaircraft?a. =abin/. Cok1tc. =argo compartment

d. *one

21.Icing conditions are most prevalent whenoperating the engine at high speeds on theground. Ice can form the inlet up to?a. %00 2/. 255 !. #/5 !&. //5 !

22.:ar" the correct statementa. Increased velocity of air causes a pressure

drop and increases the cooling e>ect on theair

b. 8vaporation of water at low pressureincreases the cooling e>ect

c. ater suspended in air comes into contactwith metal surfaces of #2 ! or below

&. All o+ t* a/o( ar orrt

2#.9abyrinth seal is widely useda. o retain oil in bearing chambers/. As a7 a)& as a ,tr)4 &( to

o)trol )tr)al ar<os.c. %nly 'a( is correct.d. *one of the above

2+.9abyrinth seal is used toa. =old location./. Hot loato).c. &oth 'a( ) 'b( are correctd. *one of the above.

2/.hich type of seals is used for cold section in ;et engine?a. =arbon seal.

b. 9abyrinth seal

. Et*r a7 or /7

d. &oth 'a( ) 'b( are correct

2-.eal which rides on highly polished shaft is.a. Car/o) sal.b. 9abyrinth sealc. @ groove seal.d. ing seal.

23.eals often used to sealing the main bearingareas in engine in hot section pressuried sealare used to prevent oil lea"age.a. Car/o) sal.

b.  hread seal

c. Bouble groove seal.d. ing seal.

24.&earing seals isa. To 1r()t loss o+ ol )to t* 4as

1at*.b. o prevent loss of fuel into the gas path.c. %nly 'b( is correct.d. *one of the above.

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2.hat is the type of oil seals?a. =arbon seal.b. 9abyrinth seal. Et*r a7 or /7d. &oth 'a( ) 'b( are correct

#5.=arbon seals is blend ofa. Car/o) a)& 4ra1*t.b. =arbon and aluminum.c. =arbon and magnesium.d. =arbon and silicon.

#