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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb depression indicates _________ humidity of the air.

Absolute
Relative
None of these
Specific

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Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

Decreases
Remains constant
None of these
Increases

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

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

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Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

5
0.2
6
1.2

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Refrigeration and Air Conditioning
The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is

More or less depending on ambient conditions
Less
More
Same

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Refrigeration and Air Conditioning
The evaporator used in household refrigerators is

None of these
Defrosting evaporator
Non-frosting evaporator
Frosting evaporator

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