单项选择题
Dirt lodged on the nozzle valve seat of a fuel injection nozzle will cause（）
A.erosion and cratering of the nozzle orifices
B.fuel leakage into the nozzle drain line
C.fuel leakage before and after injection
D.insufficient fuel delivery though that nozzle
相关考题
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单项选择题
Diesel engine cylinder head test cocks are used to （）
A.check cylinder lubrication
B.connect the pressure indicator pressure
C.test cylinder heads
D.connect the exhaust gas pyrometers -
单项选择题
Which of the following statements is correct regarding a turbocharged four-stroke/cycle diesel generator?（）
A.At zero load the intake manifold pressure is greater than the exhaust manifold pressure
B.At full load the intake manifold pressure and exhaust manifold pressure are equal
C.At full load the intake manifold pressure is less than the exhaust manifold pressure
D.At full load the intake manifold pressure is greater than the exhaust manifold pressure -
单项选择题
Lubricating oil viscosity in an operating diesel engine can be reduced by（）
A.increasing cooling water flow
B.increasing lube oil flow
C.dilution by fuel oil
D.adding SAE 70 oil
