Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

46.
When the discharge pressure is too high in a refrigeration system, high pressure control is installed to stop the compressor.
Correct
Incorrect
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
A grey body is one whose absorptivity does not vary with temperature and wave length of the incident ray.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.

48.
The wet bulb temperature during sensible cooling of air
remains constant
increases
decreases
Answer: Option
Explanation:
No answer description is available. Let's discuss.

49.
In absorption vapour systems, the refrigerant widely used is R-12.
Correct
Incorrect
Answer: Option
Explanation:
No answer description is available. Let's discuss.

50.
Hydrogen is used in electrolux refrigeration system so as to __________ the rate of evaporation of the liquid ammonia passing through the evaporator.
equalise
reduce
increase
Answer: Option
Explanation:
No answer description is available. Let's discuss.