AUTOMOBILE ENGINEERING MCQ SECTION 35

351.When the engines are built to withstand the same thermal and mechanical Stresses

(A) ηOtto > ηDual > ηDiesel 

(B)  ηDual > ηDiesel > ηOtto

(C)  ηDiesel > ηDual > ηOtto 

(D) ηOtto > ηDiesel > ηDual

Answer: -ηDiesel > ηDual > ηOtto

352.Mean effective pressure of Otto cycle is

(A) Inversely proportional to pressure ratio

(B) Directly proportional to pressure ratio

(C) Does not depend on pressure ratio

(D) Proportional to square root of pressure ratio

Answer: -Directly proportional to pressure ratio

353.For SI engine fuels most preferred are

(A) Aromatics

(B) Paraffins

(C) Olefins

(D) Napthenes

Answer: -Aromatics

354.Stoichiometric air-fuel ratio of alcohol when compared to gasoline is

(A) Higher

(B) Lower

(C) Equal

(D) None of the above

Answer: -Lower

355.In the coil spring rear suspension for a rear drive vehicle, the axle housing is kept in place by

(A) U-bolts

(B) The stabilizer bar

(C) Control arms

(D) The shock absorbers

Answer: -Control arms

356.For maximum thermal efficiency, the fuel-air mixture in SI engine should be

(A) Lean

(B) Rich

(C) Stoichiometric

(D) May be rich or lean

Answer: -Lean

357.With increase in compression ratio flame speed

(A) Increases

(B) Decreases

(C) Remain the same

(D) None of the above

Answer: -Increases

358.The type of rear axle used on trucks is

(A) Semi-floating

(B) Three-quarter floating

(C) Fully-floating

(D) None of above

Answer: -Fully-floating

359.Which stage of vehicle emission norms presently applicable in India in Internal Combustion Engine?

(A) Bharat Stage V

(B) Bharat Stage II

(C) Bharat Stage IV

(D) Bharat Stage III

Answer: -Bharat Stage IV

360. If the compressor runs, little or no difference in temperature between the low pressure and the high pressure lines indicates

(A) A full refrigerant charge

(B) Normal system operation

(C) Low or no refrigerant

(D) An overcharge of refrigerant oil

Answer: -Low or no refrigerant