單項(xiàng)選擇題

A reduction in load on a diesel engine results in （） of speed of the crankshaft.

A.a reduction
B.an increase
C.an outing
D.a downwards

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單項(xiàng)選擇題

A number of cylinder liners are enclosed in one cast iron casing to form a （）.

A.cylinder cover
B.cylinder block
C.cylinder frame
D.bed-plate

單項(xiàng)選擇題

A main bearing consists of two shells which are secured by means of studs and （）.

A.tie rods
B.through bolts
C.lead wires
D.bearing caps