Refrigeration and Air Conditioning
In a lithium bromide absorption refrigeration system

Ammonia is used as a refrigerant and lithium bromide as an absorbent
Lithium bromide is used as a refrigerant and water as an absorbent
None of these
Water is used as a refrigerant and lithium bromide as an absorbent

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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
Maintains different temperatures in evaporator in proportion to load
Is suitable only for constant load systems

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Refrigeration and Air Conditioning
The coefficient of performance of Electrolux refrigerator is the ratio of

Heat absorbed by the evaporator minus the heat supplied by the gas burner to the heat absorbed by the evaporator
Heat absorbed by the evaporator to the heat supplied by the gas burner
Heat supplied by the gas burner to the heat absorbed by the evaporator
Heat supplied by the gas burner minus the heat absorbed by the evaporator to the heat supplied by the gas burner

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