Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

56) Thermal conductivity of air increases with rise in temperature.

Answer is:

Correct

57) The material of pipe lines for a system using ammonia as a refrigerant should be copper.

Answer is:

No

58) The wave length corresponding to the maximum energy is inversely proportional to the absolute temperature. This statement is called Planck's law.

Answer is:

No

59) Which of the following refrigerant has the highest freezing point.

Answer is:

Carbon dioxide

60) Air conditioning means

Answer is:

all of these

Explanation:

Air conditioning means
* cooling
* heating
* dehumidifying

9
10
11
12
13
14
15