Cooling and Lubrication in Automobile MCQs

Question 1

Which one of the following is not the property of a good lubricant?

Accepted Answer

Becomes thicker after prolonged use

Answer

No change in viscosity due to variation in temperature

Answer

Reduces friction between machine parts

Answer

Takes up the surface pressure between sliding parts

Question 2

Efficiency of cooling system depends upon which of the following ?

Accepted Answer

All of the above

Answer

Area of fins

Answer

Temperature of the engine

Answer

Fitting position of the engine

Question 3

The function of radiator is that

Accepted Answer

It lowers the temperature of the engine coolant

Answer

It maintains the engine coolant at a constant temperature

Answer

It cleans the engine coolant

Answer

It filters the air flowing into the engine compartment

Question 4

Viscosity of oil is measured by using

Accepted Answer

All of these

Answer

Redwood viscometer

Answer

Ostwald viscometer

Answer

Say bolt viscometer

Question 5

Friction is . . . . . . . . when the surfaces are smooth and highly polished.

Accepted Answer

Low

Answer

High

Answer

Same

Answer

None of these

Question 6

Friction is . . . . . . . . when pressure is low?

Accepted Answer

Low

Answer

High

Answer

Same

Answer

None of these

Question 7

The circulation in thermo-syphon cooling system through convection currents

Accepted Answer

True

Answer

False

Answer

Neither A nor B

Question 8

Graphite is a

Accepted Answer

Solid lubricant

Answer

Liquid lubricant

Answer

Semi-liquid lubricant

Answer

None of these

Question 9

Slide ways of a machine are frequently lubricated by

Accepted Answer

Oilcan

Answer

Grease gun

Answer

Ring lubricator

Answer

Wick feed lubricator