Internal Combustion Engines MCQs

Question 1

The cooling water requirement for diesel engine is of the order of

Accepted Answer

1 to 3 litres per minute per h.p.

Answer

0.2 to 1.0 litre per minute per h.p.

Answer

5 to 10 litres per minute per h.p

Answer

10 to 20 litres per minute per h.p.

Question 2

A 4-stroke diesel engine needs about following amount of air

Accepted Answer

75000 cc per minute per h.p.

Answer

75 cc per minute per h.p.

Answer

750 cc per minute per h.p.

Answer

7500 cc per minute per h.p.

Question 3

Leakage past the piston rings and valve seats in I.C. engines with increase in speed

Accepted Answer

Decreases

Answer

Increases

Answer

Remains same

Answer

Unpredictable

Question 4

With increase in speed of vehicle, the back pressure will

Accepted Answer

Increase

Answer

Decrease

Answer

Remain unaffected

Answer

Depend on other factors

Question 5

The function of a distributor in an automobile is to

Accepted Answer

Time the spark

Answer

Distribute charge equally to all the cylinders

Answer

Regulate power

Answer

Feed lub oil to all moving parts

Question 6

The ratio of useful power; engine friction; exhaust gas losses; cooling water, air and oil losses for a diesel engine is of the order-of

Accepted Answer

25:5:35:35

Answer

5:25:30:50

Answer

25:5:10:60

Answer

40:30:15:15

Question 7

For same power and same speed, the flywheel of a four stroke engine as compared to two-stroke I.C. engine will be

Accepted Answer

Bigger

Answer

Smaller

Answer

Same size

Answer

Dependent on other engine parameters

Question 8

Air injection in I.C. engines refers to injection of

Accepted Answer

Liquid fuel and air

Answer

Air only

Answer

Liquid fuel only

Answer

Supercharging

Question 9

Solid injection in I.C. engines refers to injection of

Accepted Answer

Liquid fuel only

Answer

Liquid fuel and air

Answer

Solid fuel

Answer

Solid fuel and air