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單項選擇題

Each crank is made up of two crank webs joined by a common（） to which the bottom endbearing is fitted.

A.throw
B.crankshaft
C.crankpin
D.crosshead

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單項選擇題

During working, when the piston is near the （）, the air ignites the fine spray of fuel.

A.TDC
B.DTC
C.BDC
D.BCD

單項選擇題

During the suction stroke, the piston is moving （）.

A.inwards
B.outwards
C.downwards
D.upwards

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