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

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

For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.

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

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

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?（）

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

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

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

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