# Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

Exercise : Heat Transfer, Refrigeration and Air Conditioning - Section 6
11.
In a reversed Brayton cycle, the heat is absorbed by the air during
isentropic compression process
constant pressure cooling process
isentropic expansion process
constant pressure expansion process
Explanation:
No answer description is available. Let's discuss.

12.
Wet bulb temperature is the temperature of air recorded by a thermometer, when
it is not effected by the moisture present in the air
its bulb is surrounded by a wet cloth exposed to the air
the moisture present in it begins to condense
none of the above
Explanation:
No answer description is available. Let's discuss.

13.
A device used for transfering heat from one fluid to another is called heat exchanger.
True
False
Explanation:
No answer description is available. Let's discuss.

14.
The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by
(C.O.P.)P = (C.O.P.)R + 2
(C.O.P.)P = (C.O.P.)R + 1
(C.O.P)P = (C.O.P)R - 1
(C.O.P)P = (C.O.P)R