Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.

What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）

Proper filtering and straining of fuel oil is important because the （）.

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

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?（）

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

Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）

Combustion knock occurring in a diesel engine can be caused by （）.

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

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