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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during humidification process

Increases
None of these
Remains constant
Decreases

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Refrigeration and Air Conditioning
Short horizontal lines on pressure-enthalpy chart show

Constant total heat lines
Constant entropy lines
Constant pressure lines
Constant temperature lines

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Refrigeration and Air Conditioning
A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

2 kW
1 kW
4 kW
3 kW

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Refrigeration and Air Conditioning
During humidification process, __________ increases.

Wet bulb temperature
Relative humidity
Specific humidity
Dry bulb temperature

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Refrigeration and Air Conditioning
Nusselt number (NN) is given by

NN = hl/k
NN = μ cp/k
NN = V²/t.cp
NN = ρ V l /μ

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Refrigeration and Air Conditioning
Under cooling in a refrigeration cycle

Other factors decide C.O.P
Decreases C.O.P
Increases C.O.P
O.P remains unaltered

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