题目内容

The maintenance period of the engine depends principally on( )

A. the working condition
B.the engineer's experience
C. operational schedule
D. the engine size

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Modern diesel engines are run on( ),a fuel whose grade lies between that of HFO andMDO.

A. diesel oil
B. Intermediate Fuel Oil (IFO)
C. gas oil
D. residual oil

The fuel pump is actuated by means of a cam fitted to the( )

A. camshaft
B. crankshaft
C. tail shaft
D. intermediate shaft

In most installations, oil leaves the purifiers under sufficient head to reach the( )

A. service tank
B. settling tank
C. mixing tank
D. pressure tank

In the most up-to-date common rail diesel engine, the fuel is first stored in the fuel line andthen, when a signal is given by the engine control to( ) injected into the cylinders.

A. the pilot air valve
B. the magnetic valves
C. the safety valve
D. the cylinder valve