单项选择题
A.fuel delivery pressure B.pump plunger diameter C.plunger control rack position D.total pump stroke
The upper section of a piston is called the （）A.landB.s...
单项选择题The upper section of a piston is called the （）
A.land B.skirt C.crown D.plate
Pitted reduction gear teeth having a deep blue color wi...
单项选择题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
Which of the listed substances can be satisfactorily re...
单项选择题Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?（）
A.Sludge B.Gasoline C.Fuel oil D.Lube oil
