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单选题
If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will()
A

backfire through the air intakes

B

develop less power under load

C

have high firing pressures

D

lift its cylinder relief valves


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更多 “单选题If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will()A backfire through the air intakesB develop less power under loadC have high firing pressuresD lift its cylinder relief valves” 相关考题
考题 If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will_________.A.backfire through the air intakesB.develop less power under loadC.have high firing pressuresD.lift its cylinder relief valves

考题 _______can be a direct cause of faulty operation of diesel engine fuel injection nozzles.A.Excessive fuel nozzle holder coolingB.Sediment in the fuel supplyC.Distortion of the fuel spray patternD.Improper atomization of the fuel

考题 单选题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 decreasedB quantity of fuel injected will always be increasedC start of injection is advancedD duration of injection will always be greater

考题 单选题Load control on a diesel engine is accomplished by ().A regulating the speed of the turbochargerB rotating the fuel injector pump plungerC regulating the speed of the fuel oil transfer pumpD changing engine timing

考题 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

考题 单选题The burning of fuel oil in a diesel engine having a high sodium content, will cause ()A corrosion and grooving of exhaust valvesB corrosion and gumming of the fuel injection pumpC salt deposits in the exhaust manifoldD slag deposits in the fuel injection equipment

考题 单选题Problems with the diesel engine fuel injection pump are usually caused by()A improper adjustmentB contaminated fuelC kinked fuel linesD excessive engine vibration

考题 单选题On most diesel engines, the governor controls the output speed by ().A controlling the amount of fuel injected into the cylindersB varying the speed of the turbochargerC adjusting the compression ratioD changing the timing of the fuel injection camshaft

考题 单选题Fuels of different qualities may require advancing or retarding the injection timing, in addition to which if the injection timing is advanced when the engine is running at loads below the (), then a saving in fuel can be achieved.A BHPB MCRC IHPD MEP

考题 单选题If a single cylinder relief valve on a main propulsion diesel engine begins to lift, but it is not possible to secure the engine, which of the following actions should be taken?()A Increase the cooling water flow to the engineB Secure or reduce fuel to that cylinderC Screw down on the pressure adjusting spring to decrease to decrease popping pressureD Readjust the injection timing

考题 单选题If a single cylinder relief valve on a diesel engine lists frequently while the engine is running, the cause may be an ()A excessively late injection timing for each cylinderB incorrectly adjusted intake valve timingC incorrectly adjusted fuel injectorD incorrectly adjusted intake valve clearance

考题 单选题When the opening pressure of a diesel engine fuel injector is greater than that specified by the engine manufacturer, which of the following problems can be expected?()A Quantity of fuel injected tends to be decreasedB Quantity of fuel injected will always be increasedC Start of injection tends to be advancedD Duration of injection will always greater

考题 单选题Turbulence is created in the cylinders of a diesel engine to ()A obtain injection lagB help mix fuel and airC increase combustion pressureD utilize higher injection pressures

考题 单选题To successfully reduce an excessively high diesel engine exhaust gas temperature, you should ().A reduce the engine driven fuel pump outlet pressureB retard the fuel injector timing to reduce powerC increase the fuel rack settingD reduce the load on the engine

考题 单选题The high pressure in fuel injection system of the diesel engine is produced by the ().A injector pumpB fuel injectorC governorD turbocharger

考题 单选题The rate of fuel injection in a diesel engine cylinder depends primarily on ().A the size of the holes in the fuel nozzleB timing of the pumpC supply pressure to the pumpD shape of the combustion chamber

考题 单选题If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will()A backfire through the air intakesB develop less power under loadC have high firing pressuresD lift its cylinder relief valves

考题 单选题The fuel injection pumps on a diesel engine are controlled by a linkage system attached to the ()A camshaftB crankshaftC governorD flywheel

考题 单选题Which of the following is true about the fuel injection with an ordinary diesel engine?()A The process begins after TDCB The process ends before TDCC When the piston is near to the TDC the fuel injection endsD None of the above is true

考题 单选题Injection lag in a diesel engine may be caused by()A a higher cetane number of fuel oilB the diesel fuel used having a high viscosityC mechanical rigidity in the lube pump mechanismD a decrease rigidity in the fuel pump delivery pressure

考题 单选题A faulty injection in one cylinder of an operating diesel engine can be located by ()A cutting out individual injectors and noting engine performanceB checking lube oil temperatureC checking cam positionD using a timing light

考题 单选题Significant retardation of a diesel engine fuel injection timing will result in ()A smoother engine operationB advanced fuel ignitionC increased fuel economyD reduced engine power

考题 单选题Faulty operation of diesel engine fuel injection nozzles can be a direct cause of().A excessive fuel nozzle holder coolingB sediment in the fuel supplyC distortion of the fuel spray patternD improper atomization of the fuel

考题 单选题When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should()A increase the starting air pressureB use a higher than normal cranking speedC increase the fuel injection pressureD use a fuel having a lower ignition temperature

考题 单选题With () unit the timing of fuel injection of an engine can be regulated automatically.A MBTB MEGC VSGD VIT

考题 单选题When ship navigating in rough sea, the correct operation is ()A navigating with a low diesel engine speedB navigating with a stable diesel engine speedC increasing the efficiency of propellerD increasing fuel injection

考题 单选题Turbulence in a diesel engine cylinder is of major importance in providing ().A proper fuel meteringB complete fuel/air mixingC minimal fuel penetrationD proper fuel timing

考题 单选题Air in the fuel lines to the fuel injection nozzles of a diesel engine will cause the engine to ()A burn excessive amounts of lube oilB overheat without smokingC operate with reduce power or stopD run away without load