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單項(xiàng)選擇題

The compressed air is admitted to each cylinder through a cam operated by starting air valve when the piston has just passed its （）.

A.BDC
B.TDC
C.BBDC
D.ATDC

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單項(xiàng)選擇題

The complete assembly of bedplate, A-frames and cylinder block is held together by （） to form a rigid structure.

A.tap-bolts
B.jack-bolts
C.tie rods
D.fitted rods

單項(xiàng)選擇題

The common method of applying oil to the cylinder walls is by means of small pump assembled in units, known as （）.

A.mechanical lubricator
B.lubrication function
C.forced feed system
D.bearing lubrication

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