单项选择题
A.opening more bypass lines B.opening additional expansion valves C.adding refrigerant D.speeding up the machine
The main distribution duct in an air conditioning syste...
单项选择题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
If a compressor runs continuously, the cause might be a...
单项选择题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
Which of the following would not cause high suction pre...
单项选择题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
