A.to retain
B.to remain
C.to maintenance
D.to have
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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
A.to need
B.ready for
C.want to
D.going to be
最新試題
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
The ability of the governor to prevent fluctuations in engine speed is termed （）.
The function of diesel engine piston compression rings is to （）.
If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
Maximum horsepower of a diesel engine is attained （）.
In using reduction gears to obtain efficient propeller speeds, （）.
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
Proper filtering and straining of fuel oil is important because the （）.