單項(xiàng)選擇題

The main distribution duct in an air conditioning system which contains the cooling coils and filters is called the（）

A.manifold
B.condenser
C.chamber
D.plenum

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單項(xiàng)選擇題

If a compressor runs continuously, the cause might be a（）

A.defective thermal bulb
B.clogged scale trap
C.stuck high-pressure switch
D.stuck low-pressure switch

單項(xiàng)選擇題

Which of the following would not cause high suction pressure?（）

A.insufficient refrigeration
B.leaky suction valves
C.expansion valve stuck open
D.suction valve not adjusted properly