In using reduction gears to obtain efficient propeller speeds, （）.

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

What is the function of the thrust bearing?（）

Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.

For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.

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

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

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

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 （）.