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?（）

Lube oil cannot be efficiently filtered if its （）.

How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）

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

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

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

The main purpose of the piston oil scraper 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 （）.

White smoke exhausting from an operating diesel engine may indicate （）.