A.boiler
B.heater
C.engine
D.cooler
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A.to retain
B.to remain
C.to maintenance
D.to have
A.good lubrication
B.low thermal stress
C.good mechanical properties
D.acid corrosion
A.for starting diesel engines
B.in pneumatic control system
C.in pneumatic tools
D.All the above are true
A.the air receivers
B.the starting valves
C.the cylinder covers
D.the distributors
A.machine efficiency
B.machinery efficiency
C.mechanical efficiency
D.mechanics efficiency
最新試題
If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
Combustion knock occurring in a diesel engine can be caused by （）.
Proper filtering and straining of fuel oil is important because the （）.
When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）
Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.
In using reduction gears to obtain efficient propeller speeds, （）.
The highest pressure in a diesel engine cylinder normally occurs （）.