A.starting the ME
B.starting the emergency electric alternator
C.driving the main turbine
D.driving the turbocharger
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A.air compressor
B.refrigeration compressor
C.vacuum pump
D.purifier
A.boiling off
B.flash evaporation
C.condensation
D.none of the above
A.to cut down the amount of cooling water needed
B.to prevent an excess amount of cooling water from being discharged to the bilges
C.to supply hot water to the evaporator for more economical operation
D.None of the above is tree
A.to decrease scale formation
B.for better cooling effect
C.for more economical purpose
D.to raise vacuum
A.a brine pump
B.an air ejector
C.a feed water pump
D.a condensate pump
A.a brine pump
B.an air ejector
C.a feed pump
D.distillate pump
A.dispose
B.dissolve
C.heat
D.dissipates
A.Evaporation
B.Circulation
C.Condensation
D.Distillation
A.Hydraulic oil
B.Animal oil
C.Light oil
D.Fuel oil
A.Motors
B.Check valves
C.Safety valves
D.Reducing valve
最新试题
An excessive charge of refrigerant in an air-cooled refrigeration system can cause ().
The usual symptoms of cavitation in a centrifugal pump is ().
If the head pressure of a reciprocating refrigeration compressor is excessive, ().
Thermostatic expansion valves can be adjusted for ().
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its ().
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?()
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by ().
A pressure drop through the refrigerant liquid line may cause ().
The output volume of a positive fixed displacement pump can be changed only by ().