The function of diesel engine piston compression rings is to （）.

In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.

If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.

In a simple mechanical governor, the （）.

How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）

A thrust bearing is used with a propulsion diesel engine to （）.

Combustion knock occurring in a diesel engine can be caused by （）.

A diesel engine piston ring face is in direct contact with the （）.

The ability of the governor to prevent fluctuations in engine speed is termed （）.

Maximum horsepower of a diesel engine is attained （）.