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

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.

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

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

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

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

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?（）

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

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

Maximum horsepower of a diesel engine is attained （）.