Automobile Engineering MCQs

Question 1

The basic purpose of providing caster angle on wheels is to

Accepted Answer

Maintain directional control

Answer

Prevent uneven tyre wear

Answer

Bring the road contact of the tyre under the point of load

Answer

Compensate for wear in the steering linkage

Question 2

The coefficient of rolling resistance for a truck weighing 63,500 N is 0.018. The rolling resistance to the truck is

Accepted Answer

1143 N

Answer

1.143 N

Answer

11.43 N

Answer

114.3 N

Question 3

Instead of valves, the ports are used in case of

Accepted Answer

Two stroke I.C. engines

Answer

Four stroke I.C. engines

Answer

V6 engines

Answer

None of these

Question 4

An overinflated tyre will wear the tread most near the

Accepted Answer

Centre

Answer

Edges

Answer

Corners

Answer

None of these

Question 5

The connecting rods are generally made of __________ shaped cross-section.

Accepted Answer

I

Answer

C

Answer

L

Answer

H

Question 6

The problems caused by the wheel imbalance are

Accepted Answer

Steering wheel vibrations and uneven tyre wear

Answer

Hard steering and hard ride

Answer

Poor acceleration and hard steering

Answer

Poor acceleration and reduced fuel efficiency

Question 7

The compression ratio in petrol engine is kept less than in Diesel engine because

Accepted Answer

Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition

Answer

It makes petrol engines lighter

Answer

Less compression ratio gives better performance

Answer

It is just customary to have less compression ratio in petrol engines

Question 8

In a Diesel engine, the function of a fuel injector is to

Accepted Answer

Spray atomized fuel in the cylinder

Answer

Mix the fuel and air

Answer

Ignite the air-fuel mixture

Answer

Provide flame front for ignition

Question 9

If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about

Accepted Answer

10 : 1

Answer

17 : 1

Answer

15 : 1

Answer

13 : 1