A.much
B.more
C.most
D.less
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A.lower than；can lubricate
B.lower than；can cool
C.higher than；can enter
D.higher than ；cannot enter
A.the cylinder cover
B.the piston rings
C.the piston crown
D.the piston skirt
A.whatever
B.whenever
C.wherever
D.whoever
A.scavenging
B.starting
C.cooling
D.blowing
A.make use of
B.have made the use of
C.by means of
D.make advantage of
最新試題
An automated diesel engine should normally shut down due to （）
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 （）.
In a simple mechanical governor, the （）.
Proper filtering and straining of fuel oil is important because the （）.
Maximum horsepower of a diesel engine is attained （）.
Routine monitoring of a diesel engine should include （）.
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.