Refrigeration and Air Conditioning
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

All of these
Water temperature being high
Dirty condenser surface
Lack of cooling water

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Refrigeration and Air Conditioning
The bypass factor for a cooling coil

Increases with increase in velocity of air passing through it
Decreases with increase in velocity of air passing through it
May increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering
Remains unchanged with increase in velocity of air passing through it

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

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

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