i c engines MCQs – Page 4

B. net calorific value of oil

C. all of the above

D. calorific value of fuel

E. low heat value of oil

B. 4-stroke cycle engines

C. 2-stroke cycle engines

D. aeroplane engines

E. diesel engines

A. adjusting the spark plug gap

B. adjusting ignition coil position

D. delaying the spark by increasing capacitor in ignition circuit

E. rotating the crank

A. about 10% lean mixture

B. about 3-5% rich mixture

D. uniform throughout the mixture

E. chemically correct mixture

A. inject fuel in cylinder

B. does not exist

C. supply fuel when carburettor fails

B. Theoretically correct mixture of air am petrol is approximately 15 : 1

C. High speed compression engines operate on dual combustion cycle

D. Diesel engines are compression ignition engines

E. Thermal efficiency of diesel engine i about 34%

A. 15-20%

B. 20-25%

C. 35-50%

D. 25-30%

A. 5%

C. 100%

D. 50%

E. 1%.

A. improve heat transfer

B. prevent clogging

C. improve surface finish

E. reduce cost

A. iso-octane

B. alpha methyl napthalene

C. mixture of paraffins and aromatics

E. mixture of methane and ethane

A. 92%

B. 68%

C. 25%.

D. 52%

A. 1-2-3-4

B. 1-4-2-3

C. 1-3-4-

D. 1-2-4-3

A. scavenging

B. pre-ignition

C. dissociation and carburretion of fuel

E. turbulence

A. kcal

B. kcal/m2

C. kcal/kg

D. all of the above

A. conserve heat

B. reduce formation of condenstae

D. keep the exhaust pipes warm

E. increase engine efficiency

A. 150CPC

B. 500C

D. 250C

E. 2000C

A. exhaust will be smoky

B. exhaust temperature will be high

C. engine starts overheating

E. piston rings would stick into piston grooves

A. slanted

B. depressed

C. flat

E. convex shaped

A. 1000- 1500C

B. 1500-2000C

D. 500- 1000C

E. 2500-3000C

A. 0.7

B. 1.25

C. 0.5

E. 1