A.in order to
B.because of
C.so that
D.so as to
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A.play a great part on
B.run a role in
C.plays an important part in
D.acts as important part at
A.an oil seal
B.removing heat
C.a gas seal
D.cooling the piston
A.ignition ratio
B.power ratio
C.compression ratio
D.injection ratio
A.nip
B.nap
C.gap
D.lip
A.less than
B.lighter than
C.larger than
D.smaller than
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Proper filtering and straining of fuel oil is important because the （）.
Combustion knock occurring in a diesel engine can be caused by （）.
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 （）.
How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）
A diesel engine piston ring face is in direct contact with the （）.
White smoke exhausting from an operating diesel engine may indicate （）.
What is the function of the thrust bearing?（）
Maximum horsepower of a diesel engine is attained （）.
The minimum speed an engine must attain before ignition can occur depends upon （）.