Refrigeration And Air Conditioning - Study Mode
[#231] Chaperon equation is applicable for registration at
Correct Answer
(A) Saturation point of vapour
Explanation
Solution: Chaperon equation is applicable for registration at Saturation point of vapour
[#232] Moisture should be removed from refrigerants to avoid
Correct Answer
(D) All of these
Explanation
Solution: Moisture should be removed from refrigerants to avoid - Freezing at the expansion valve - Restriction to refrigerant flow - Corrosion of steel plates
[#233] Air refrigerator works on
Correct Answer
(C) Both (A) and (B)
Explanation
Solution: Air cycle refrigeration works on Reversed Carnot cycle and Bell Coleman cycle. Air is compressed and then heat removed, this air is then expanded to a lower temperature than before it was compressed. Work is taken out of the air by an expansion turbine, which removes energy as the blades are driven round by the expanding air.
[#234] The bypass factor of a cooling coil decreases with
Correct Answer
(A) Decrease in fin spacing and increase in number of rows
Explanation
Solution: The bypass factor is a function of the airflow, number of rows, surface temperature, number of fins per inch, height of fins and many other construction attributes of coils. The bypass factor of a cooling coil decreases with decrease in fin spacing and increase in number of rows.
[#235] The formation of frost on cooling coils in a refrigerator
Correct Answer
(C) Increases power consumption
Explanation
Solution: The formation of frost on cooling coils in a refrigerator increases power consumption