单选题While overhauling a jerk-type fuel pump it is necessary to replace the pump plungerWhich of the parts listed below must also be replaced?（）ADelivery check valveBPump barrelCTubing to the injectorDCam follower
单选题
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
参考解析
解析：
暂无解析
相关考题：
Which of the following problems is the main source of fuel pump and injection system malfunctions?A.Improper lubricationB.Air in the fuel systemC.Coated fuel linesD.Excessive vibration
If it becomes necessary to pump bilges while a vessel is in port, which of the following procedures should be followed?A.Pump only if the discharge is led to a shore tank or bargeB.Pump only during the hours of darknessC.Pump only on the outgoing tideD.Pump only as much as is necessary
The amount of fuel delivered by a helical plunger fuel injection pump is controlled by ______.A.varying the pump discharge pressureB.varying the pump return pressureC.rotation of the pump plungerD.rotation of the pump barrel
If you must pump bilges while a vessel is in port，you should pump only ______．A.If discharge is led to a shore tank or bargeB.During the hours of darknessC.On the outgoing tideD.As much as is necessary
单选题In a jerk pump, the amount of fuel that will be forced through the spray nozzle on each upward stroke of the plunger depends on （）Athe pump supply pressureBthe slope of the fuel camChow the plunger is rotatedDthe number of sleeve segments engaged with the rack
单选题While overhauling a jerk-type fuel pump it is necessary to replace the pump plungerWhich of the parts listed below must also be replaced?（）ADelivery check valveBPump barrelCTubing to the injectorDCam follower
单选题Problems with the diesel engine fuel injection pump are usually caused by（）Aimproper adjustmentBcontaminated fuelCkinked fuel linesDexcessive engine vibration
单选题If you detect oil in the water around your vessel while discharging fuel, the FIRST thing to do is（）.Atry to find out where the oil is coming fromBcall the MasterChave the pump man check the discharge pipingDshutdown operations
单选题Which of the following problems is the main source of fuel pump and injection system malfunctions?（）AImproper lubricationBAir in the fuel systemCCoated fuel linesDExcessive vibration
单选题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.Afinished with enginesBstopCstand byDfull ahead
单选题The pump has a constant stroke and the amount of fuel delivered is regulated by rotating （） which has a specially arranged helical groove cut into it.Athe pump cylinderBthe pump camCthe pump plungerDthe pump miler
单选题Fuel pump index is （）.Athe viscosity indexBthe fuel oil contentsCthe starting speedDthe reading at the rack
单选题If it becomes necessary to pump bilges while a vessel is in port, which of the following procedures should be followed?（）APump only if the discharge is led to a shore tank or bargeBPump only during the hours of darknessCPump only on the outgoing tideDPump only as much as is necessary
单选题The safe rate of bunkering heavy fuel oil is directly related to the （）.Atype of fuel transfer pump aboardBtemperature of the fuel oil being receivedCsize of the fuel storage tanks ashoreDdistance from the fuel oil storage tanks ashore
单选题Injection lag in a diesel engine may be caused by（）Aa higher cetane number of fuel oilBthe diesel fuel used having a high viscosityCmechanical rigidity in the lube pump mechanismDa decrease rigidity in the fuel pump delivery pressure
单选题The fuel is supplied to the pump through ports or openings in the （） or cylinder of the pump.AbottleBinjectorCpistonDbarrel
单选题The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to （）.Aassist in a quick cutoff of fuel injectionBallow oil backflow from the injector to the helixCreduce fuel oil pressure between injection strokesDmeter the quantity of fuel delivered
单选题The major cause of fuel pump and injection system problems is （）Aimproper adjustmentsBcontaminated fuelCkinked fuel linesDexcessive engine vibration
单选题If it becomes necessary to cutout an individual cylinder of a large, low-speed, main propulsion diesel engine, the fuel to that cylinder should be secured and its （）Afuel pump should be removed and all connections blanked offBcylinder oil feed rate should be increased slightly above that used at normal sea speedCcylinder oil feed rate should be reducedDcylinder oil feed rate should be increased to the maximum flow capable of the metering pump
单选题Low compression pressure in a diesel engine may be the result of （）Ainsufficient fuel supply due to fuel pump valves sticking or leakingBexcessive mechanical clearance between the piston crown and cylinder headCexcessively worn fuel pump plungerDexcessive exhaust back pressure
单选题The effective pump stroke of an individual port-and-helix fuel injection pump is determined by the （）Afuel delivery pressureBpump plunger diameterCplunger control rack positionDtotal pump stroke
单选题Fuel injected into a diesel engines cylinder is ignited by （）.Athe heat compressed fuel/air mixture in the cylinderBthe fuel igniterCthe fuel injectorDthe fuel pump
单选题The amount of fuel delivered by a helical plunger fuel injection pump is controlled by （）Avarying the pump discharge pressureBvarying the pump return pressureCrotation of the pump plungerDrotation of the pump barrel
单选题A common trouble with the fuel pump plungers or fuel valve spindle is （）.Abroken downBstuckCoil leakageDcarbonized