单选题Fuel oil injected into the cylinder of a diesel engine just after the piston passes top dead center, will()Aincrease engine powerBincrease engine loadCdecrease engine powerDimprove fuel economy
单选题
Fuel oil injected into the cylinder of a diesel engine just after the piston passes top dead center, will()
A
increase engine power
B
increase engine load
C
decrease engine power
D
improve fuel economy
参考解析
解析:
暂无解析
相关考题:
Fuel droplets injected into a diesel engine cylinder must have adequate penetration to ____.A.prolong the ignition delay periodB.ensure the beginning of fuel injectionC.thoroughly utilize the air chargeD.allow controlled fuel combustion
If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at theA.fuel line connections to the cylinder injection valvesB.gasket surfaces of the fuel oil filtersC.discharge fittings of the fuel injector pumpsD.suction side of the fuel oil transfer pump
When fuel is injected late into a diesel engine cylinder_______.A.the exhaust will be clearB.fuel consumption will be lowC.all the fuel will be burned at top dead centerD.fuel consumption will be high
Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by______.A.using fuel oil with low cetane numberB.a badly worn piston pinC.a loose flywheel keyD.a loose bed plate bolt
单选题Low compression in a diesel engine can be caused by ()Aclogged coolant passagesBa leaking cylinder head gasketClow fuel oil pressureDworn or broken cylinder liner sealing rings
单选题The consistent burning of fuel oil with a high sulfur content in a diesel engine will result in ()Aclogged fuel injection pumpsBincreased cylinder liner wearCintake valve stem corrosionDvarnish deposit on pistons
单选题Which of the listed problems would be indicated by an accumulation of water in one cylinder, in addition to the crankcase of an idle diesel engine?()AExcessive cylinder linerBwater in the fuel systemCCracked cylinder linerDLeaking lube oil cooler
单选题When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer,the ()Aquantity of fuel injected is decreasedBquantity of fuel injected will always be increasedCstart of injection is advancedDduration of injection will always be greater
单选题Fuel oil discharged to the diesel engine cylinder is atomized at the ()AturbochargerBinjection nozzle tipCcarburetorDfuel oil pump
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?()AQuantity of fuel injected tends to be decreasedBQuantity of fuel injected will always be increasedCStart of injection tends to be advancedDDuration of injection will always greater
单选题When fuel is injected late into a diesel engine cylinder,().Athe exhaust will be clearBfuel consumption will be lowCall the fuel will be burned at top dead centerDfuel consumption will be high
单选题Diesel engine fuel oil contamination often results in ()Agovernor malfunctionsBfuel injection system malfunctionsChigh cylinder lube oil temperaturesDlow intake temperatures
单选题Low compression pressure in a diesel engine is caused by()Alow water in the expansion tankBimproperly seated valvesClow fuel oil pressureDworn or broken cylinder liner sealing rings
单选题Low compression in a diesel engine could be caused by()Aworn or broken cylinder liner sealing ringsBhigh cooling water temperatureCworn or broken piston ringsDlow fuel oil pressure
单选题In a diesel engine, when the fuel is injected into the cylinder,()Athe piston is just coming upward from the bottom dead centerBthe piston has moved about one-fifth of the way upCthe piston has moved most of the way up and almost reached the TDCDthe piston has just past the TDC
单选题A change in the quality of fuel atomization by a diesel engine fuel injector would be caused by a/an ()Aincrease in engine speedBincrease in cylinder turbulenceCleaking needle valveDreduction in cylinder turbulence
单选题One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an ()Adecrease in ignition lagBincrease in fuel economyCreduction in lube oil viscosityDincrease in cylinder misfiring
单选题Engine coolant accumulating in the diesel engine lubricating oil can result from a ()Alow oil pressureBhigh coolant pressureCleaking fuel injectorDcracked cylinder head or liner
单选题Heat for igniting the fuel oil in the cylinder of a diesel engine is generated by the ()Aelectronic ignition systemBcompression of air by the pistonCfriction in the fuel injectorDfuel oil bearing system
单选题If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the ()Afuel line connections to cylinder injection valvesBgasket surfaces of the fuel oil filtersCdischarge fitting of the fuel injector pumpsDsuction side of the fuel oil tran
单选题Fuel oil begins injection into the cylinder of a four-stroke/cycle diesel engine during the ().Aintake strokeBexhaust strokeCpower strokeDcompression stroke
单选题One of function of diesel engine lubricating oil is to ()Ainduce carbon formation on cylinder wallsBimprove fuel penetration in the combustion spaceCform a friction reducing film between mating surfacesDlubricate the fuel injection
单选题Fuel droplets injected into a diesel engine cylinder must have adequate penetration to ()Aprolong the ignition delay periodBensure the beginning of fuel injectionCthoroughly utilize the air chargeDallow controlled fuel combustion
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When fuel is injected in a diesel engine cylinder too early, ()Aignition may be delayedBfuel economy is not affectedCexhaust gas temperature will be unchangedDthe exhaust will be clear
单选题Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except()Aopen the indicator cocksBsupply some CYL Oil to cylinder liner wall with lubricator (only for two stoke diesel engine)Cput the fuel handle in the “stop” positionDpump up the air bottle
单选题Clogged diesel engine fuel oil filters can cause()Aloss of powerBmisfiringClow fuel oil pressureDAll of the above