Refrigeration And Air Conditioning - Study Mode

[#266] In case of sensible cooling of air, the coil efficiency is given by
Correct Answer

(B) 1 - B.P.F.

Explanation

Solution: In case of sensible cooling of air, the coil efficiency is given by 1 - B.P.F.

[#267] The specific humidity during dehumidification process
Correct Answer

(C) Decreases

Explanation

Solution: The specific humidity during dehumidification process Decreases

[#268] The specific humidity during humidification process
Correct Answer

(B) Increases

Explanation

Solution: The specific humidity during humidification process Increases

[#269] The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called
Correct Answer

(A) Coefficient of performance of refrigeration

Explanation

Solution: The efficiency of a refrigerator or heat pump is given by a parameter called the coefficient of performance (C.O.P.). The C.O.P. of a refrigerator is given by the following equation: $$eqalign{
& { ext{C}}{ ext{.O}}{ ext{.P}}{ ext{.}} = frac{{{ ext{Desired Output}}}}{{{ ext{Required Input}}}} cr
& = frac{{{ ext{Cooling Effect}}}}{{{ ext{Work Input}}}} cr
& = frac{{{ ext{QL}}}}{{ ext{W}}} cr} $$

[#270] The material of pipe lines for a system using Freon as a refrigerant should be
Correct Answer

(B) Copper

Explanation

Solution: The material of pipe lines for a system using Freon as a refrigerant should be copper