单项选择题

Which of the following operation will have a direct impact on the rate of wear in a cylinder liner （）

A.amount of scavenge air to the cylinder
B.quality of fuel injected
C.viscosity of the lube oil
D.compression ratio of the piston

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Which of the following reasons represents why the desig...

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A.compression must be low for effective spark ignition
B.compression must be low for required horsepower and torque generation
C.compression must be low to prevent pre-ignition
D.compression must be low to have effective pre-ignition

The exhaust system of a diesel engine is usually design...

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Which of the conditions listed could cause the cylinder...

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C.Very late injection timing
D.Incorrect crankshaft clearance

船舶电气与船舶安全

Which of the following operation will have a direct impact on the rate of wear in a cylinder liner （）