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

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

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

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

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

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

In a simple mechanical governor, the （）.

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

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

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