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

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

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

Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.

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

If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.

White smoke exhausting from an operating diesel engine may indicate （）.

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

In a simple mechanical governor, the （）.