单项选择题X 纠错
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
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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
单项选择题
A.dehydrated
B.purged
C.plugged
D.evacuated
单项选择题
A.combustion control air system
B.supply air system
C.ships service air system
D.low pressure deck air system
单项选择题
A.dry bulb temperature
B.wet bulb temperature
C.saturation temperature
D.water vapor superheat
单项选择题
A.The follow-up gear
B.The rudder angle indicator
C.The synchronous electric transmitter
D.A rudder angle limit switch
单项选择题
A.apparent slip
B.tree slip
C.pitch
D.propulsive efficiency
单项选择题
A.two or more impellers housed together in one casing and mounted on a single shaft
B.a single stepped impeller mounted in a progressively staged casing
C.a large radial clearance between the impeller and casing to prevent overheating due to
D.an increase in the discharge velocity of the liquid with a corresponding decrease in pressure through the stages
单项选择题
A.add refrigerant to the system
B.adjust the thermal expansion valve to the proper setting
C.adjust the float valve to the proper holding pressure
D.open the hand expansion valve
