A.Suction head
B.Pump head
C.Discharge head
D.Total head
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A.toxic
B.flammable
C.explosive
D.all of the above
A.Fire pump and lube oil pump
B.Lube oil pump and distilling plant
C.Distilling plant and shaft alley door
D.Shaft alley door and fixed CO2 release
A.bypass the high pressure stage to the low pressure stage on 100% of the air compressors in service
B.prevent excessive inter-stage pressure buildup
C.control compressor discharge pressure
D.remove all but the frictional load during starting
A.The relief valves in the system should be readjusted
B.The filters and strainers should be checked frequently
C.All system pressure should be readjusted
D.The system should be drained and renewed with a fluid of different operating characteristics
A.100℃
B.125℃
C.150℃
D.175℃
最新試題
When the steering gear is in operation, you should （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
A pressure drop through the refrigerant liquid line may cause （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
A grease gun is generally used to lubricate a （）.
If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should （）.
The major source of chemical contaminants in hydraulic fluid is （）.