Defective timing gear in a diesel engi

1、The pH value of water in a diesel engi

The pH value of water in a diesel engine closed cooling water system should be maintained between （）.A60 to75B80 to 95C100 to 115D120 to 135

2、Air in the fuel lines of a diesel engi

Air in the fuel lines of a diesel engine can cause （）Aignition failureBoxygen corrosion of the fuel linesCthe pistons to seizeDblue smoke

3、When fuel is injected in a diesel engi

When fuel is injected in a diesel engine cylinder too early, （）Aignition may be delayedBfuel economy is not affectedCexhaust gas temperature will be unchangedDthe exhaust will be clear

4、In a diesel engine, the time taken to

In a diesel engine, the time taken to heat the fuel particles, turn them into vapor, and bring about combustion is called （）Ainjection lagBignition delayCcompressionDturbulence lag

5、The process of supplying a diesel engi

The process of supplying a diesel engine cylinder with air at a pressure greater than atmospheric is called（）.Aengine displacementBsuper-aspiratingCair injectionDsupercharging

6、Defective atomizer in a diesel engine

Defective atomizer in a diesel engine will lead to（）.Asmoky exhaustBstarting failureCoverloadDover speed