The fuel injector pump is operated by （） which drives the plunger up and down.

[单选题]The injector pump is operated by a cam which drives （） up and down.A . the needle valveB . the plungerC . the pistonD . the cylinder

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

[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]Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily byA．heat conduction into the injected fuel oilB．heat conduction into the water jacket wallC．water circulation through passages in the holderD．fuel oil circu

[单选题]Fix the fuel injector into （） after repair.A . the cylinder linerB . the cylinder coverC . the cylinder jacketD . the pisto

[单选题]Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily by （）.A . heat conduction into the injected fuel oilB . heat conduction into the water jacket wallC . water circulation through passages in the holderD . fu

[单选题]The fuel injector injects a fine spray of fuel into the hot air and combustion （）, producing much high pressure in the gases.A . has begunB . takes placeC . occursD . happe

[单选题]The major cause of fuel pump and injection system problems is _____.A．improper adjustmentsB．contaminated fuelC．kinked fuel linesD．excessive engine vibration

[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