单选题If a gasoline engine turns over freely but will not start，the cause is generally（）.Aa defective ignition systemBlow lube oil levelCweak valve springsDtoo heavy a load
单选题
If a gasoline engine turns over freely but will not start，the cause is generally（）.
A
a defective ignition system
B
low lube oil level
C
weak valve springs
D
too heavy a load
参考解析
解析：
暂无解析
相关考题：
199 During extremely cold weather, while starting an engine,it turns too slowly and fails to start.This problem is most likely theresult of() A.high fuel oil viscosityB.low fuel oil temperatureC.high lube oil viscosityD.energized alow plugs
If a diesel engine turned over freely but failed to start, the cause could be ________.A.water in the fuelB.cold lube oilC.excessive starting air pressureD.excessive fuel pressure
The diesel engine is similar to the gasoline engine in that______.A.both of them are ignited by compressed airB.both of them are the forms of external combustion enginesC.both of them have spark plugsD.the power is developed by the piston in the cylinder
Which of the following is the stated proper sequence before commencing cargo operations aboard Ro-Ro vessels?A.Start ventilation，lower the ramp，notify engine roomB.Lower the ramp，start ventilation，notify engine roomC.Notify engine room，lower the ramp，start ventilationD.Start ventilation，notify engine room，lower the ramp
Before starting a gasoline engine on a motorboat，you should make sure for safety that ______．A.The gasoline tank is fullB.The bilges，cabins，etc．are thoroughly ventilatedC.You have fresh water on boardD.Each of the above is followed
If a gasoline engine turns over freely but will not start，the cause is generally ______．A.A defective ignition systemB.Low lube oil levelC.Weak valve springsD.Too heavy a load
An engine compartment gasoline fire requires which type of extinguisher?______.A.Carbon dioxideB.Dry chemicalC.FoamD.All of the above
机舱人员应启动机舱里的消防泵。（）A、Engine room persons should stop their pumps in machinery space.B、Engine room persons should start their pumps in machinery space.C、Engine room persons should start their pumps in officer’s cabin.D、Engine room persons should start their pumps on boat deck.
单选题If a diesel engine turned over freely but failed to start, the cause could be （）Awater in the fuelBcold lube oilCexcessive starting air pressureDexcessive fuel pressure
单选题Which of the following is the stated proper sequence before commencing cargo operations aboard Ro-Ro vessels?（）AStart ventilation，lower the ramp，notify engine roomBLower the ramp，start ventilation，notify engine roomCNotify engine room，lower the ramp，start ventilationDStart ventilation，notify engine room，lower the ramp
单选题If a diesel engine driving a generator turns over freely but fails to fire properly, the cause could be （）Aexcessive compression pressureBair in the fuel linesChigh fuel pressureDexcessive load
单选题Before starting a gasoline engine on a motorboat，you should make sure for safety that（）.Athe gasoline tank is fullBthe bilges，cabins，etc. are thoroughly ventilatedCyou have fresh water on boardDEach of the above is followed
单选题What determines the number of events occurring in a cycle of operation in an internal combustion engine?（）ACrankshaft revolutionBType of engine (diesel or gasoline)CDistance a piston travels during a strokeDNumber of pistons
单选题The trouble-free life of an engine indicates （）.Athe period of time during which no trouble occurs to the engineBno trouble will occur to the engine all its lifeCtrouble may occur freely to the engineDno matter what you do to the engine, no trouble will occur during this period
单选题A diesel engine fails to start because of water in the fuelIn order to start the engine, you should （）?Aturn engine with jacking gearBdrain filters and strainers and bleed off water at each injection pumpCuse ether to start the engine with blow-down valves openDblow through the cylinders and fuel lines with a drying agent
单选题When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）Astarting air pressureBscavenge air pressureCover-speed tripDbanjo oiler line
单选题Before starting any diesel or gasoline engine，which of the following must be checked? （）AOil levelBFlow of cooling waterCExhaust dischargeDAll of the above
单选题A diesel engine is similar to a gasoline engine except that the former has no （）.Across-headBcylinderCconnecting rodDspark plug
单选题An engine compartment gasoline fire requires which type of extinguisher?（）ACarbon dioxideBDry chemicalCFoamDAll of the above
单选题The diesel engine is similar to the gasoline engine in that （）.Aboth of them are ignited by compressed airBboth of them are the forms of external combustion enginesCboth of them have spark plugsDthe power is developed by the piston in the cylinder
单选题If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or （）Aexcessive fuel pressureBhigh lube oil viscosityCinadequate fuel injectionDexcessive starting air pressure
单选题“The engine not obtaining the sufficient speed for firing” means that （）.Athe start failsBthe fuel pumps will be put into operationCthe fuel valves are damagedDthe combustion process will take over
单选题Gasoline fuel tank vents should terminate（）.Ain the engine compartmentBin the fuel tank spaceCabove or outside the hullDat the most convenient location
单选题When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）Aan obstruction in an cylinderBwater accumulation in some engine cylindersClow starting air pressureDlow scavenge air pressure
单选题According to the relevant regulation, lifeboat should be powered by（）.Ainboard diesel engineBoutboard diesel engineCoutboard gasoline engineDinboard gasoline engine
单选题Following an overhaul of a crosshead type diesel engine, the engine is jacked over with the turning gear as part of the pre-start procedure, which of the listed pre-start procedures should be carried out?（）AEnsure proper cylinder lube oil flowBOpen all air space drain cocksCOpen all indicator valvesDall of the above
单选题To find the cause of a gasoline engine’s failure to start，you should（）.ABreak the joint in the fuel line at the engine and let the gas run in the bilgesBDisconnect the wires at the spark plugs and make the spark jump the gapCPrime the engine with ether through spark plug openingsDVentilate the space，then check the battery，spark plugs，carburetor，and fuel line