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單項選擇題

The effective pump stroke of an individual port-and-helix fuel injection pump is determined by the （）

A.fuel delivery pressure
B.pump plunger diameter
C.plunger control rack position
D.total pump stroke

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單項選擇題

The upper section of a piston is called the （）

A.land
B.skirt
C.crown
D.plate

單項選擇題

Pitted reduction gear teeth having a deep blue color with evidence of overheating have been operated with （）

A.excessive speed
B.improper warm-up
C.extreme misalignment
D.inadequate lubrication

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