Refrigeration and Air Conditioning
Formation of frost on evaporator in refrigerator

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

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Refrigeration and Air Conditioning
A thermostatic expansion valve in a refrigeration system

Ensures the evaporator completely filled with refrigerant of the load
None of these
Is suitable only for constant load systems
Maintains different temperatures in evaporator in proportion to load

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