Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

46.
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about
1
1.25
2.15
5.12
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
The undesireable property of a refrigerant is
non-toxic
non-flammable
non-explosive
high boiling point
Answer: Option
Explanation:
No answer description is available. Let's discuss.

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

49.
Radiation is the process of heat transfer in which heat flows from a __________ , in a straight line, without affecting the intervening medium.
cold body to hot body
hot body to cold body
smaller body to larger body
larger body to smaller body
Answer: Option
Explanation:
No answer description is available. Let's discuss.

50.
The heating of air, without any change in its specific humidity, is known as sensible heating.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.