单项选择题X 纠错
A.capacity of 0%
B.efficiency of 100%
C.internal slippage of 0%
D.shut off horsepower rating of 100%
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单项选择题
A.series of baffles
B.crossover pipe
C.condensate separator
D.drain pump
单项选择题
A.at the compressor discharge
B.at the compressor suction
C.in the expansion valve
D.in the receiver
单项选择题
A.Pressure-reducing valve
B.Unloading valve
C.Counterbalance valve
D.Pressure-relief valve
单项选择题
A.motor overload would open
B.relief valve would open
C.pump would eventually overheat
D.motor would overheat
单项选择题
A.Compound gage
B.Bonrdon tube
C.Manometer
D.Deadweight gage
单项选择题
A.cavitation
B.water hammer
C.fluid friction
D.steam knock
单项选择题
A.sub-cooled liquid
B.high temperature liquid
C.oil saturated liquid
D.superheated vapor
单项选择题
A.Reciprocating
B.Centrifugal
C.Rotary
D.Gear
单项选择题
A.change in the impeller diameter
B.square of the impeller radius
C.cube of the impeller diameter
D.impeller efficiency for large changes in its size
单项选择题
A.As pressure decreases, volume increases
B.As volume increases, pressure increases
C.As volume decreases, pressure decreases
D.As pressure increases, volume increases
