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

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

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

A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.

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

If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.

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

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

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

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