Automobile Engine MCQs

Question 1

Oxides of nitrogen are formed when the products of combustion are heated above-

Accepted Answer

3000°F

Answer

300°F

Answer

1000°F

Answer

5000°F

Question 2

The crankshaft bending should not generally exceed

Accepted Answer

0.08 mm

Answer

0.008 mm

Answer

0.8 mm

Answer

8 mm

Question 3

The function of an alternator in an automobile is to

Accepted Answer

Continually recharges the battery

Answer

Supply electric power

Answer

Converts mechanical energy into electrical energy

Answer

Partly converts engine power into electric power

Question 4

In modern vehicles, the headlight dimming switch is mounted on the

Accepted Answer

Steering column

Answer

Dash board

Answer

Flour board

Answer

Side panel

Question 5

Why are the helical gears used commonly in transmission over spur gears?

Accepted Answer

Low noise level and high strength

Answer

Low cost and high strength

Answer

Low noise level and economy

Answer

Low noise level and low cost

Question 6

In a d. c. generator magnetic field is produced in the

Accepted Answer

Stator

Answer

Armature

Answer

Commutator

Answer

Carbon brushes

Question 7

The PCV valve is located between the:

Accepted Answer

Intake manifold and crankcase

Answer

Air cleaner and the carburettor

Answer

Carburettor and the intake manifold

Answer

Intake manifold and air cleaner

Question 8

What is the angle between the vertical when the top of the wheel slants outward?

Accepted Answer

Positive camber

Answer

Negative camber

Answer

Negative castor

Answer

Positive castor

Question 9

Select a false statement for Spark Ignition (SI) engine.

Accepted Answer

Low self ignition temperature of fuel is desirable

Answer

It is based on Otto cycle

Answer

Requires an ignition system with spark plug in the combustion chamber

Answer

Compression ratio = 6 to 10.5