A.of
B.up of
C.from
D.out
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A.piston skirt
B.piston crown
C.guide way
D.cross-head
A.between；to
B.either；or
C.from；to
D.neither；nor
A.to help
B.to limit
C.to protect
D.to remove
A.a reduction
B.an increase
C.an outing
D.a downwards
A.cylinder cover
B.cylinder block
C.cylinder frame
D.bed-plate
最新試題
The main purpose of the piston oil scraper rings is to （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.
The ability of the governor to prevent fluctuations in engine speed is termed （）.
In using reduction gears to obtain efficient propeller speeds, （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
A diesel engine piston ring face is in direct contact with the （）.
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.