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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Is equal to 1
Is more than 1
Depends upon the make
Is less than 1

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Refrigeration and Air Conditioning
The thermostatic expansion valve is used in ________ type of evaporators.

None of these
Flooded
DX coil
Dry

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Refrigeration and Air Conditioning
The capillary tube is not used in large capacity refrigeration systems because

Required pressure drop cannot be achieved
It is made of copper
Cost is too high
Capacity control is not possible

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Refrigeration and Air Conditioning
Vertical lines on pressure-enthalpy chart show constant

Pressure lines
Total heat lines
Entropy lines
Temperature lines

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Refrigeration and Air Conditioning
In a refrigerating machine, heat rejected is _________ heat absorbed.

Equal to
None of these
Greater than
Less than

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Refrigeration and Air Conditioning
Formation of frost on evaporator in refrigerator

Is immaterial
Increases heat transfer rate
Can be avoided by proper design
Results in loss of heat due to poor heat transfer

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