单选题Failure of fuel injection is usually due to trouble in the （）.Aexhaust valvesBmechanical lubricatorsCcooling water pumpsDfuel injection pumps
单选题
Failure of fuel injection is usually due to trouble in the （）.
A
exhaust valves
B
mechanical lubricators
C
cooling water pumps
D
fuel injection pumps
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相关考题：
If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at theA.fuel line connections to the cylinder injection valvesB.gasket surfaces of the fuel oil filtersC.discharge fittings of the fuel injector pumpsD.suction side of the fuel oil transfer pump
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