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

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

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

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 （）.

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

A thrust bearing is used with a propulsion diesel engine to （）.

Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.

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

Diesel engine control can be obtained by the bridge （）.