I.C. ENGINE MCQ -: 04

Q.1 The constant volume process in I.C. engines is characterstic of ______.

A. Compression -ignition 

B. Spark ignition 

C. Two stroke engine 

D. Four stroke engine 

Ans -: B

Q.2 Which machine will produce continuous work without receiving any energy from other system ?

A. Simple machine

B. Hydraulic machine 

C. Perpetual motion machine 

D. All of the above 

Ans -: C

Q.3 In which type of engine , low CO and hydrocarbon emission occurs at low and moderate loads ?

A. Diesel engine 

B. Petrol engine 

C. Gas engine 

D. S.I. engine 

Ans -: A

Q.4 Hunting occur in the engine due to ____ .

A. Faulty governor 

B. Over - control by the governor 

C. Bad engine designs

D. Improperly designed governor 

Ans-: B

Q.5  Commonly used antifreeze solution in automobiles is ?

A. Lead ethyl

B. Iso-octane 

C. Glycol 

D. Heptane 

Ans -: C

Q.6 The automobiles generally utilise batteries having voltage ____ .

A. 10 V

B. 6 V

C. 12V

D. 24 V

Ans -: C

Q.7 For compression ignition engine, compression ratio usually  varies between __.

A. 4 - 6

B. 10 - 18

C. 14 - 25

D. 6 - 12

Ans -: C

Q.8  Which device is used for atomising and vaporising the fuel and micing it with air in varying proportions?

A. Vaporizer 

B. Carburettor 

C. Compressor 

D. None of these 

Ans -: B

Q.9 Which of the following engines can work on very lean mixture?

A. S.I. engine

B. C.I. engine 

C. Two stroke engine 

D. Four stroke engine 

Ans-: B

Q.10 The four stroke cycle is complete in ___ revolution of crankshaft.

A. 1

B. 1/2

C. 4

D. 2 

Ans -: D

Q.11 Which device takes care of the fluctuations or the cyclic variations in speed ?

A. Piston rings

B. Fly wheel

C. Crank shaft

D. Connecting rod 

Ans -: B

Q.12  The air fuel ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be ___ .

A. Lower 

B. Unpredictable 

C. Higher 

D. None of the above 

Ans -: C

Q.13 Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quality to ignite momentarily when brought in contact with a flame known as __ .

A. Cloud point

B. Flash point

C. Pour point 

D. None of the above 

Ans -: B

Q.14 Optimum spark advance is the timing which develops maximum ___ .

A. Torque 

B. Power

C. Efficiency 

D. None of these 

Ans -: A

Q.15 The ratio of actual fuel air ratio and chemical  correct fuel air ratio known as____.

A. Relative fuel air ratio 

B. Actual fuel air ratio

C. Compression ratio

D. None of these 

Ans -: A