单项选择题
A leaking diesel engine fuel injector will cause（）
A.prolonged maintenance intervals B.improved atomization C.greater fuel economy D.incomplete combustion
单项选择题 The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually（）
单项选择题 A sudden decrease in the diesel engine lube oil viscosity could be an indication of（）
单项选择题 Dirt lodged on the nozzle valve seat of a fuel injection nozzle will cause（）
