单项选择题
A.reciprocating B.rotating C.running D.removing
Doors are generally formed in the （） of the both in-lin...
单项选择题Doors are generally formed in the （） of the both in-line and Vee engines to give maintenance access to the crankshaft main and connecting rod large end bearing.
A.bedplates B.columns C.cylinder blocks D.safety caps
Dirty oil must be （） before being used again.A.mixed wi...
单项选择题Dirty oil must be （） before being used again.
A.mixed with clean oil B.purified C.heated D.strained
Dirt in the fuel oil system of a diesel engine can caus...
单项选择题Dirt in the fuel oil system of a diesel engine can cause （）.
A.clogged filters B.poor combustion C.overloading of the diesel D.shock of fuel lines
