A.Moisture separator
B.Vacuum breaker
C.Lubricator
D.Non-return valve
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A.rate of doing work
B.amount of force needed to overcome friction
C.amount of work accomplished
D.distance through which an object is moved
A.re-adjust the discharge pressure
B.clean the expansion valve screen
C.add refrigerant
D.adjust the expansion valve
A.splash method
B.mechanical force feed lubricators
C.detached sump method
D.internal cooling passages in the crankshafts and connecting rods
A.change the expansion valve adjustment
B.readjust the water regulating valve to increase the flow of water
C.purge air from the condenser
D.clean the waterside of the condenser
A.the pump over-speeding
B.an improper rudder response
C.bubbles in the sight glass
D.ram relief valves lifting
最新試題
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
A salinity indicator is used to determine the （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
The major source of chemical contaminants in hydraulic fluid is （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.