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

To determine if the lube oil filter elements need changing, （）.

The minimum speed an engine must attain before ignition can occur depends upon （）.

Lube oil cannot be efficiently filtered if its （）.

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

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

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

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 （）.

Maximum horsepower of a diesel engine is attained （）.