A.return to a neutral position
B.flood the evaporator
C.open
D.close
您可能感兴趣的试卷
你可能感兴趣的试题
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
A.trick-wheel
B.follow-up control
C.six-way valve
D.Rapson slide
最新试题
The output volume of a positive fixed displacement pump can be changed only by ().
When the steering gear is in operation, you should ().
One cause of high head pressure occurring in a refrigeration system can be ().
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump ().
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
The rate of heat transfer from a hot region to a cold region is affected most by the ().
The usual symptoms of cavitation in a centrifugal pump is ().
A salinity indicator is used to determine the ().
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?()
If the head pressure of a reciprocating refrigeration compressor is excessive, ().