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

In a simple mechanical governor, the （）.

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

If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.

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

When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）

Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.

The highest pressure in a diesel engine cylinder normally occurs （）.

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

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