A.the steering
B.the driven gear
C.the turning gear
D.the timing gear
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A.commercially available
B.commercially
C.commercial available
D.commerce available
A.to a great extent
B.on a great extent
C.on mainly
D.on only
A.the type of coolant
B.the design of the engine
C.the type of fuel to be burned
D.B and C
A.nuts
B.bolts
C.coil springs
D.stuffing boxes
A.being bolted
B.bolted
C.bolting
D.to be bolted
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The main purpose of the piston oil scraper rings is to （）.
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?（）
The function of diesel engine piston compression rings is to （）.
Maximum horsepower of a diesel engine is attained （）.
Combustion knock occurring in a diesel engine can be caused by （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
Diesel engine control can be obtained by the bridge （）.
The minimum speed an engine must attain before ignition can occur depends upon （）.
A diesel engine piston ring face is in direct contact with the （）.
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.