The engine has one or two group of fuel pumps， depending upon （）.

The ships’ generator broke down, and the pumps had to be operated ________ instead of mechanically.

词汇与结构 The engine driven pumps are used in main hydraulic ________ systems.

The oil is drawn from a drain tank through （）， one of a pair of pumps， into one of fine filters.

The ship’sgenerator broke down and the pumps _____ ( 不得不用手工进行操作 ) instead of mechanically.

Where is not in the engine room? A: main engine B: auxiliary engine C: pumps D: steering gear

Depending on the power sources, pumps used in hydraulic system are divided into engine driven pump, electrically driven pump and hand pump.

How many oil pumps does CFM56-3’s oil system have? ( ) A: 4 B: 3 C: 1 D: 2

When fire pumps are used for other than firefighting service，each pipe connecting the other service (except for branch lines used for deck washing) must have a（）.

In the majority of lubricating oil systems for internal combustion engines, the external system includes such parts as _____, _____, _____, and _____. A: engine oil B: sumps C: oil pumps D: oil coolers