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

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 （）.

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

Lube oil cannot be efficiently filtered if its （）.

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

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

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

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

Maximum horsepower of a diesel engine is attained （）.