When a fuel injection nozzle overheats

1、A fuel injection valve opening at pres

A fuel injection valve opening at pressure lower than normal will result in（）.Alate fuel injectionBearly fuel injectionChigh exhaust temperature from that cylinderDdecreased effective stroke from that injector

2、Late fuel oil injection in a diesel en

Late fuel oil injection in a diesel engine can result in （）Afuel knockBincreased powerClow compression pressureDhigh exhaust temperature

3、The rate of fuel injection in a diesel

The rate of fuel injection in a diesel engine cylinder depends primarily on （）.Athe size of the holes in the fuel nozzleBtiming of the pumpCsupply pressure to the pumpDshape of the combustion chamber

4、Fuel droplets injected into a diesel e

Fuel droplets injected into a diesel engine cylinder must have adequate penetration to （）Aprolong the ignition delay periodBensure the beginning of fuel injectionCthoroughly utilize the air chargeDallow controlled fuel combustio

5、Late fuel injection in a diesel engine

Late fuel injection in a diesel engine is indicated by low firing pressure with（）Ahigh exhaust temperatureBlow exhaust temperatureCfuel knock in each cylinderDmechanical knock in each cylinder

6、Heat damage to fuel injection nozzles

Heat damage to fuel injection nozzles can be prevented by avoiding （）Aexcessive fuel oil temperatureBlong periods of engine overloadCmetallic contact between nozzles and cylinder headsDhard carbon deposit and varnish on the nozzle