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

An automated diesel engine should normally shut down due to （）

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

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

To determine if the lube oil filter elements need changing, （）.

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?（）

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

If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.

In a simple mechanical governor, the （）.

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