Combustion knock occurring in a diesel

1、Combustion knock will most likely occu

Combustion knock will most likely occur as a result of using a fuel with（）Alow ignition qualityBa high volatilityClow ignition delayDa high cetane number

2、Combustion knock can occur in the cyli

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.Aa shortened ignition delay periodBa lean fuel/air mixtureCexcess fuel in the combustion chamberDrapid vaporization of injected fuel droplet

3、Theoretical perfect combustion in a di

Theoretical perfect combustion in a diesel engine yields by-products of （）.Aaldehydes and carbon dioxideBwater vapor and carbon monoxideCnitrogen and carbon monoxideDwater vapor and carbon dioxide

4、A diesel engine with a combustion cham

A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.Adouble-acting engineBopposed pistons engineCsingle-acting engineDhorizontal acting engine

5、Poor combustion in a diesel engine can

Poor combustion in a diesel engine can be caused by （）.Ahigh compression pressureBlow intake air temperatureClow exhaust pressureDhigh scavenge air pressure

6、Incomplete combustion in a running die

Incomplete combustion in a running diesel engine can cause piston rings to become stuck as a result of （）Aresidual carbon depositsBlube oil viscosity breakdownCuneven heat expansion of the ringsDuneven heat expansion of the pisto