单项选择题
A.a cooling system B.a lubricating system C.an electric system D.an injection system
Fuel injection valves should be taken out, cleaned, and...
单项选择题Fuel injection valves should be taken out, cleaned, and lifting checked every （）.
A.two to four months B.four to six months C.six to eight months
Fuel injection uses the jet pump system and a Woodward ...
单项选择题Fuel injection uses the jet pump system and a Woodward type hydraulic （） is used to control engine speed.
A.controller B.governor C.instrument D.apparatus
Fuel injected into a diesel engines cylinder is ignited...
单项选择题Fuel injected into a diesel engines cylinder is ignited by （）.
A.the heat compressed fuel/air mixture in the cylinder B.the fuel igniter C.the fuel injector D.the fuel pump
