Automobile Engineering MCQs

Question 1

Which of the following indicates multi-grade oil?

Accepted Answer

SAE20 W50

Answer

SAE 30

Answer

API SF

Answer

API 50

Question 2

One effect of detonation is

Accepted Answer

Loss of power

Answer

Delay in ignition

Answer

Overheating of engine

Answer

Overcooling of engine

Question 3

The main cause for the change in engine oil viscosity is

Accepted Answer

Temperature

Answer

Humidity

Answer

Vibration

Answer

Contamination

Question 4

The purpose of adding pigment to the paint is that it

Accepted Answer

Gives colour and filling up effect to the paint

Answer

Optimises the viscosity of paint

Answer

Makes paint film hard

Answer

None of the above

Question 5

The two kinds of piston rings are

Accepted Answer

Compression and oil control rings

Answer

Compression and sliding seal rings

Answer

Oil scrapper and oil control rings

Answer

Pressure and sealing rings

Question 6

The function of a first compression ring (top ring) is that it

Accepted Answer

Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber

Answer

Increases the combustion temperature

Answer

Creates swirl

Answer

Maintains a seal and prevents the fuel leakage

Question 7

The function of oil control rings is that it

Accepted Answer

Prevents engine oil from going into the combustion chamber and returns excess lubricating oil off the cylinder wall through the return holes in the piston to the oil pan

Answer

Lubricates the cylinder wall by releasing oil from its hole

Answer

Keeps the cylinder wall lubricated by holding oil in its channel

Answer

Maintains a seal and prevents escape of burned gases and oil leakage

Question 8

The torque available at the contact between driving wheels and road is known as

Accepted Answer

Tractive effort

Answer

Brake effort

Answer

Clutch effort

Answer

None of these

Question 9

The sequence order of events in a four stroke engine is

Accepted Answer

Suction compression power exhaust

Answer

Suction exhaust power compression

Answer

Suction power compression exhaust

Answer

Exhaust compression power suction