Automobile Engineering MCQs

Question 1

The octane rating of petrol commercially available is

Accepted Answer

85 - 95

Answer

95 - 100

Answer

100 - 110

Answer

110 - 125

Question 2

If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on

Accepted Answer

Too rich mixture

Answer

Too lean mixture

Answer

Stoichiometric mixture

Answer

Most economical mixture

Question 3

A maintenance free battery

Accepted Answer

Has lead-calcium plate grid

Answer

Has lead-antimony plate grid

Answer

Does not contain acid

Answer

Does not contain water

Question 4

The correct way to rectify an imbalanced wheel is to

Accepted Answer

Attach appropriate weights to the wheel at appropriate positions

Answer

Adjust the tyre pressure

Answer

Rotate the tyres

Answer

Adjust the damper spring tension

Question 5

The purpose of a balancer shaft is to

Accepted Answer

Reduce vibrations caused by the crankshaft rotation

Answer

Balance the timing in the movement of the two groups of pistons

Answer

Increase inertia force of the rotating crankshaft

Answer

Adjusts the timing of the intake and exhaust valve openings

Question 6

An under-inflated tyre will wear the tread most

Accepted Answer

Near the edges

Answer

Near the centre

Answer

In the lateral direction

Answer

In the cross direction

Question 7

A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

Accepted Answer

Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion

Answer

Allows the steering wheel to be turned by a greater amount when steering

Answer

Makes the steering more responsive

Answer

Reduces the amount of kickback for large steering angles

Question 8

The petrol engines are also known as

Accepted Answer

Spark ignition (S.I.) engines

Answer

Compression ignition (C.I.) engines

Answer

Steam engines

Answer

None of these

Question 9

The Diesel engines are also known as

Accepted Answer

Compression ignition (C.I.) engines

Answer

Spark ignition (S.I.) engines

Answer

Steam engines

Answer

None of these