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

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

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

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

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

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

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

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

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

Maximum horsepower of a diesel engine is attained （）.