单项选择题

The starting air bottle should be pumped up to maximum pressure by the （） before start of the engine.

A.air compressor
B.refrigeration compressor
C.vacuum pump
D.purifier

相关考题

The process during which liquid containing a reasonable...

单项选择题The process during which liquid containing a reasonable amount of sensible heat at a particular pressure immediately changes into steam after admitted to a chamber at a lower pressure is called （）.

A.boiling off
B.flash evaporation
C.condensation
D.none of the above

When distilling salt water the cooling water dischargin...

单项选择题When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.

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

When distilling sea water the cooling water discharging...

单项选择题When distilling sea water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.

A.to decrease scale formation
B.for better cooling effect
C.for more economical purpose
D.to raise vacuum

船舶辅助机械

The starting air bottle should be pumped up to maximum pressure by the （） before start of the engine.