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單項(xiàng)選擇題

Bedplates are the （） of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.

A.hull
B.projection
C.graphitization
D.foundation

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單項(xiàng)選擇題
Because the castings of smaller engines are not so big and heavy, （） and cylinder block may be made in one piece.
A.the column
B.the jacket
C.cylinder cover
D.cylinder liner
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Bearing knocks are likely to occur from （）.
A.less clearance
B.dirty lube oil
C.overload
D.bearing wear
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Be sure to make the engine turn by （） before starting and after stopping .
A.steering gear
B.turning gear
C.steering wheel
D.turning cycle
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At the top of the A-frames there is a strong cast iron frame called （）.
A.cylinder liner
B.cylinder cover
C.the gear box
D.the scavenging box
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At least （） cylinders in four-stroke engine will be configured to ensure that the engine can be started with the crankshaft at whatever position.
A.6
B.2
C.12
D.8
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As the plunger moves up, the ports are closed and the fuel （） and delivered to the injector nozzle at very high pressure.
A.being compressed
B.to be pumped up
C.is pressurized
D.are built up
單項(xiàng)選擇題
As for a diesel engine, lack of combustion air may be due to （）.
A.fouling turbine
B.fuel pump faults
C.lubrication failure
D.excessive cooling
單項(xiàng)選擇題
As a heat engine,（） energy is the source of power by which the diesel engine can be operated.
A.electric
B.heat
C.mechanical
D.exhaust
單項(xiàng)選擇題
An overspeed safety device is usually fitted to a generator engine for （） in the event of overspeed.
A.cutting power off the engine
B.increasing the fuel pump setting
C.braking the crankshaft
D.stabilizing the ship speed
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An interlock in the remote operating valve line stops the valve （） when the engine turning gear is engaged.
A.to open
B.opening
C.open
D.opened

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