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

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• A common trouble with the fuel pump plungers or fuel valve spindle is （）.

  A . broken down B . stuck C . oil leakage D . carbonized

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• （）is harmful for fuel pumps, fuel valves, cylinder liner, exhaust valve seats, and the turbocharger blades as well.

  A . Bad combustion of the fuel B . Bad atomization of the fuel C . Liquid contaminants D . Solid contaminant

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• The effective pump stroke of an individual port-and-helix fuel injection pump is determined by the （）

  A . fuel delivery pressure B . pump plunger diameter C . plunger control rack position D . total pump stroke

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• While overhauling a jerk-type fuel pump it is necessary to replace the pump plungerWhich of the parts listed below must also be replaced?（）

  A . Delivery check valve B . Pump barrel C . Tubing to the injector D . Cam follower

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• The amount of fuel delivered by a unit injector is controlled by the （）

  A . camshaft B . main spring C . rack position D . nozzle orifice size

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• Maintaining the close tolerances in diesel fuel pumps and injectors requires the use of（）.

  A . fuel/water separators B . day tanks C . injector test stand D . fuel filter

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• When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer，the （）

  A . quantity of fuel injected is decreased B . quantity of fuel injected will always be increased C . start of injection is advanced D . duration of injection will always be greater

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• Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily by （）.

  A . heat conduction into the injected fuel oil B . heat conduction into the water jacket wall C . water circulation through passages in the holder D . fuel oil circulation through passages in the holder

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• Fix the fuel injector into （） after repair.

  A . the cylinder liner B . the cylinder cover C . the cylinder jacket D . the pisto

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• The injector pump is operated by a cam which drives the plunger （）.

  A . top and bottom B . to and fro C . up and down D . back and forth

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• Fuel oil is pumped by means of （） from the bunker tanks.

  A . a transfer pump B . a bilge pump C . a service pump D . a vacuum pum

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• Because the timing of injection is crucial, （） mounted on the camshaft, which is driven by the crankshaft are used to operate the fuel pumps, one of which is provided for each cylinder.

  A . gears B . rams C . barrels D . cam

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• The major cause of fuel pump and injection system problems is （）

  A . improper adjustments B . contaminated fuel C . kinked fuel lines D . excessive engine vibratio

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• A common trouble with the fuel pump plunger or fuel valve spindle is （）.

  A . water leakage B . steam leakage C . oil leakage D . air leakage

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• If the engine can be started and maneuvered on high viscosity fuel, the （）of the fuel reaching the injectors should be raised to such a point that the viscosity is less than the required value, ie27c St.

  A . pressure B . temperature C . viscosity D . density

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• The fuel injector injects a fine spray of fuel into the hot air and combustion （）, producing much high pressure in the gases.

  A . has begun B . takes place C . occurs D . happe

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• The plunger in the fuel injector pump, usually operated by a （）, is driven up and down when working.

  A . crankshaft B . camshaft C . piston rod D . rack and pinio

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• The amount of fuel injection into a diesel engine cylinder by a unit injector, is controlled by（）

  A . the firing pressure in the cylinder B . a metering helix inside the pump C . varying the physical length of the plunger stroke D . varying the clearance between the injector cam and the injector rocker arm

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• The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to （）.

  A . assist in a quick cutoff of fuel injection B . allow oil backflow from the injector to the helix C . reduce fuel oil pressure between injection strokes D . meter the quantity of fuel delivered

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• Fuel injection uses the jet pump system and a Woodward type hydraulic （） is used to control engine speed.

  A . controller B . governor C . instrument D . apparatu

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• When possible，what is the FIRST step in fighting an engine fuel-pump fire which results from a broken fuel line?（）

  A . Secure all engine room doors，hatches，and vents B . Close the fuel line valve C . Check the spread of the fire with foam D . Cast the barge off the wharf

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• The injector pump is operated by a cam which drives the （） up and down.

  A . piston B . drum C . plunger D . barrel

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• The fuel booster pump and steam to fuel heater, together with fuel pipe heater tracer line should be shut off as soon as the （） order is acknowledged.

  A . finished with engines B . stop C . stand by D . full ahead

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• In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.

  A . a service tank B . a collecting tank C . a sump D . a settling tank

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