The major cause of fuel pump and injection system problems is _____.

A．improper adjustments

B．contaminated fuel

C．kinked fuel lines

D．excessive engine vibration

[单选题]With VIT unit the timing of fuel injection of an engine can be regulated automatically according to the （）.A . ship draftB . pitchC . engine loadD . oil viscosity

[单选题]Fuel pump index is （）.A . the viscosity indexB . the fuel oil contentsC . the starting speedD . the reading at the rack

[单选题]The fuel injector pump is operated by （） which drives the plunger up and down.A . a separate motorB . a camC . a generatorD . a chai

[单选题]Engine fuel pump index is （）.A . the viscosity indexB . the fuel oil contentsC . the starting speedD . the reading at the rack

[单选题]A．n increase in the fuel injection pump discharge pressure can be caused by a/an _______.A．leaking delivery valveB．excessive bearing end playC．plugged injector spray holeD．increased plunger stroke

[单选题]A common trouble with the fuel pump plunger or fuel valve spindle is （）.A . water leakageB . steam leakageC . oil leakageD . air leakage

[单选题]The plunger in the fuel injector pump, usually operated by a （）, is driven up and down when working.A . crankshaftB . camshaftC . piston rodD . rack and pinio

[单选题]Fuel injection uses the jet pump system and a Woodward type hydraulic （） is used to control engine speed.A . controllerB . governorC . instrumentD . apparatu

[填空题] Fuel pump的中文意思是（）。

[单选题]During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.A . ensure penetration and distribution of the fuel in the combustion chamberB . ensure the needle valve is flushed clean during each injectionC . prevent combust