单项选择题

Which of the following terms is used to identify the pressure of the liquid entering a pump?（）

A.Suction head
B.Pump head
C.Discharge head
D.Total head

相关考题

Ammonia when used as a refrigerant is valuable because ...

单项选择题Ammonia when used as a refrigerant is valuable because of its high efficiency, it is however （）.

A.toxic
B.flammable
C.explosive
D.all of the above

Which of the following is operated from the main engine...

单项选择题Which of the following is operated from the main engine room console on an automated vessel?（）

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

An un-loader is installed on an air compressor to （）.A....

单项选择题An un-loader is installed on an air compressor to （）.

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

船舶辅助机械

Which of the following terms is used to identify the pressure of the liquid entering a pump?（）