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

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

A.at TDC
B.before TDC
C.after TDC
D.during air starting

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

A.Spark plug
B.Heat of compression
C.Carburetor
D.Glow ping

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