Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

46.
The thermostatic expansion valve operates on the changes in the
degree of superheat at exit from the evaporator
temperature of the evaporator
pressure in the evaporator
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is
high pressure saturated liquid
wet vapour
very wet vapour
dry vapour
Answer: Option
Explanation:
No answer description is available. Let's discuss.

48.
The freezing point of R-12 is
-86.6°C
-95.2°C
-107.7°C
-135.8°C
Answer: Option
Explanation:
No answer description is available. Let's discuss.

49.
The refrigerant supplied to a compressor must be
superheated vapour refrigerant
dry saturated liquid refrigerant
a mixture of liquid and vapour refrigerant
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

50.
The unit of thermal diffusivity is
m/hK
m/h
m2/h
m2/hK
Answer: Option
Explanation:
No answer description is available. Let's discuss.