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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During humidification process, __________ increases.

Wet bulb temperature
Specific humidity
Relative humidity
Dry bulb temperature

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Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

1.25
0.5
0.8
0.25

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Refrigeration and Air Conditioning
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and

Lithium bromide
Carbon dioxide
R-12
Sulphur dioxide

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Refrigeration and Air Conditioning
The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is

0.6
0.67
0.376
0.4

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Refrigeration and Air Conditioning
Which of the following refrigerants has lowest freezing point?

NH3
CO2
Freon-12
Freon-22

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Refrigeration and Air Conditioning
Air refrigerator works on

None of these
Both (A) and (B)
Bell Coleman cycle
Reversed Carnot cycle

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