单项选择题X 纠错
A.system was overcharged with refrigerant
B.system was low on refrigerant
C.suction valves were leaking slightly
D.relief valve was leaking slightly
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单项选择题
A.broken inlet valves
B.broken discharge valves
C.pulsations in the air distribution system
D.overloading of the air distribution system
单项选择题
A.warping head
B.fairlead
C.wildcat
D.capstan
单项选择题
A.system was overcharged with refrigerant
B.high pressure switch was improperly adjusted
C.expansion valve strainers were fouled
D.suction valves were leaking slightly
单项选择题
A.increased pump speed
B.excessive pump discharge pressure
C.too low of a tilting box angle
D.low pump speed
单项选择题
A.Lube oil passing through the system
B.Moisture or foreign matter collecting at the valve seat and orifice
C.Variable spring tension caused by the changing temperature
D.Frost on the liquid line
单项选择题
A.an immediate crankcase explosion
B.oil contamination in the compressed air
C.a decrease in compressor capacity
D.no immediate loss of the compressed air capacity
单项选择题
A.The density of the air entering the compressor
B.The temperature of the air entering the compressor
C.The designed rotating speed of the compressor
D.A leaking head gasket
单项选择题
A.Differential
B.Trunk
C.Barrel
D.Valve-in-head
单项选择题
A.return to a neutral position
B.flood the evaporator
C.open
D.close
单项选择题
A.control air system
B.forced draft air system
C.supply air system
D.ships service air system