When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.

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

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

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

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

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

What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）

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

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

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.