A.Differential
B.Trunk
C.Barrel
D.Valve-in-head
您可能感兴趣的试卷
你可能感兴趣的试题
A.return to a neutral position
B.flood the evaporator
C.open
D.close
A.control air system
B.forced draft air system
C.supply air system
D.ships service air system
A.dehydrated
B.purged
C.plugged
D.evacuated
A.combustion control air system
B.supply air system
C.ships service air system
D.low pressure deck air system
A.dry bulb temperature
B.wet bulb temperature
C.saturation temperature
D.water vapor superheat
A.The follow-up gear
B.The rudder angle indicator
C.The synchronous electric transmitter
D.A rudder angle limit switch
A.apparent slip
B.tree slip
C.pitch
D.propulsive efficiency
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
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
A.a stuck solenoid valve
B.a shortage of refrigerant
C.too much oil in circulation
D.too much superheat
最新试题
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its ().
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by ().
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump ().
Low compressor head pressure in a refrigeration system can be caused by().
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
A salinity indicator is used to determine the ().
A grease gun is generally used to lubricate a ().
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will ().
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()
The usual symptoms of cavitation in a centrifugal pump is ().