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

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

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

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

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

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

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

Routine monitoring of a diesel engine should include （）.

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

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