Multiple Choice Questions (MCQ) with Answers on Automobile Engineering – Engine Cooling system

Multiple Choice Questions (MCQ) with Answers on Automobile Engineering – Engine Cooling system

 

1-In engine _____ period of a cycle is required for cooling the engine.

  1. 1/10
  2. 3/10
  3. ½
  4. 9/10

(Ans: d)

 

2-In engine about ______ % of the heat energy is actually converted into mechanical work.

  1. 25
  2. 40
  3. 55
  4. 70

(Ans: a)

 

3-The greater the temperature difference

  1. Higher is the heat transfer rate
  2. Lower is the heat transfer rate
  3. There is no difference in heat transfer rate
  4. Any of the above

(Ans: a)

 

4-An antifreeze mixture is used to achieve

  1. Freezing point depression
  2. Boiling point elevation
  3. Both ‘a’ and ‘b’
  4. None of the above

(Ans: c)

 

5-The following is (are) used as antifreeze is

  1. Ethylene glycol
  2. Ethyl alcohol
  3. Methyl Alcohol
  4. All of the above

(Ans: d)

 

6-An engine that runs cold is

  1. Very efficient
  2. Increases wear
  3. Does not achieve good fuel mileage
  4. Do not contaminate oil

The following is correct

  1. Only i
  2. i & ii
  3. ii & iii
  4. ii, iii & iv

(Ans: c)

 

7-The following is (are) the advantage(s) of water cooling over air cooling system.

  1. Mechanical noise is reduced
  2. Temperature of engine parts is more uniform
  3. Both ‘a’ and ‘b’
  4. None of the above

(Ans: c)

 

8-The purpose of radiator is ______ of heat to the atmosphere.

  1. Dissipation
  2. Radiation
  3. Convection
  4. Conduction

(Ans: a)

 

9-In radiator

  1. Relatively small amount of water are brought into contact with large surface areas of metal
  2. Relatively large amount of water are brought into contact with small surface areas of metal
  3. Equal amount of water are brought into contact with equal surface areas of metal
  4. Any of the above

(Ans: a)

 

10-The following type of radiator matrices has greatest structural strength?

  1. Film type
  2. Tube and flat fin type
  3. Tube and corrugated type
  4. None of the above

(Ans: c)

 

11-The following type of radiator matrices is most efficient?

  1. Film type
  2. Tube and flat fin type
  3. Tube and corrugated type
  4. None of the above

(Ans: c)

 

12-The following carries coolant between the engine water jackets and the radiator.

  1. Heater hose
  2. Radiator hose
  3. Engine hose
  4. None of the above

(Ans: b)

 

13-A typical cooling system circuit has the thermostat between

  1. Engine outlet and radiator
  2. Radiator outlet and engine inlet
  3. Both ‘a’ and ‘b’
  4. None of the above

(Ans: c)

 

14-Radiators are

  1. Heat exchangers
  2. Economizers
  3. Pre-heaters
  4. None of the above

(Ans: a)

 

15-The following type of pump is used in car to circulate coolant in forced water cooling system.

  1. Vane type
  2. Gear type
  3. Screw type
  4. Centrifugal type

(Ans: d)