單項選擇題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


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題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

2.單項選擇題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

3.單項選擇題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

4.單項選擇題A defective injector nozzle in a propulsion diesel engine can cause（）

A.engine power losses
B.smoking due to unburned fuel
C.high exhaust temperature readings
D.all of the above

5.單項選擇題The major cause of problems occurring with fuel injection equipment is（）

A.incorrect replacement of barrels and plungers of jerk pumps
B.overheating of the nozzle orifices
C.cracked pump housings
D.dirt in the fuel