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

Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.

Lube oil cannot be efficiently filtered if its （）.

Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）

Proper filtering and straining of fuel oil is important because the （）.

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

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

Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.

The main purpose of the piston oil scraper rings is to （）.

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