Cooling and Lubrication in Automobile MCQs

Question 1

Coolant is used because

Accepted Answer

Cooling the tool and wash out chips

Answer

It is cheap

Answer

It is available in big quantity

Answer

None of the above

Question 2

The temperature at which lubricating oil will give off sufficient vapours to form combustable mixture with air is known as

Accepted Answer

Flash poin

Answer

Fire point

Answer

Pour point

Answer

Combustion point

Question 3

Which among the following is not the purpose of a grease?

Accepted Answer

Prevent entry of foreign materiali.e., dust, dirt etc., in the bearing

Answer

Carry away heat produced in bearing

Answer

Prevent metal-to-metal contact and reduce friction

Answer

Provide a cushion to a load and shocks

Question 4

What is the function of lubricating oil?

Accepted Answer

All are correct

Answer

To minimize friction and wear

Answer

To cool by carrying away heat

Answer

To cushion the parts against vibration and impact

Question 5

Which of the classifications indicates a multigrade oil?

Accepted Answer

SAE 20W - 50

Answer

SAE 30

Answer

API SF

Answer

API 50

Question 6

For effective cutting of steel with hand hacksaw, which one of the following coolant is suitable?

Accepted Answer

Kerosene oil

Answer

Cutting oil

Answer

Grease

Answer

Lard oil

Question 7

Which of the following thermostat valves used in automobiles?

Accepted Answer

All are correct

Answer

Below type thermostat

Answer

Bimetallic thermostat

Answer

Wax element thermostat

Question 8

The lubricant used for steam cylinders is-

Accepted Answer

All are correct

Answer

Lard oil

Answer

Tallow oil

Answer

Tape oil

Question 9

Which one of the following is the reason that tap water is not preferred as coolant on machine tools?

Accepted Answer

Due to high cooling effect the cutting edges of tool break off

Answer

It decreases cutting action of the tool

Answer

Danger of corrosion

Answer

It has insufficient cooling effect