A safe fuel system must ______.A.prevent engine overheatingB.have proper air/gasoline fuel mixture ratioC.be liquid- and vapor-tightD.supply sufficient air to the intake manifold
A safe fuel system must ______.
A.prevent engine overheating
B.have proper air/gasoline fuel mixture ratio
C.be liquid- and vapor-tight
D.supply sufficient air to the intake manifold
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
If the engine does not start on air, it may be due toA.low compression of the fuel pumpsB.incorrect timing of fuel pumpsC.the starting air valves stuckD.air-locks in fuel oil pipeline
What is NOT a requirement for the preparation of used，gasoline-propelled cars if they are to be carried as ordinary cargo and not as hazardous cargo ________．A.The engine must be run until it dies from lack of fuelB.The fuel tank must be inerted with CO2C.The ignition key may not be in the ignitionD.The vehicle must be inspected for fuel leaks
Gasoline fuel tank vents should terminate ______．A.In the engine compartmentB.In the fuel tank spaceC.Above or outside the hullD.At the most convenient location
Your vessel has a gasoline engine and a mechanical exhaust ventilation system．BEFORE starting the engine，the exhaust blower should be run long enough to ______．A.warm up the exhaust blower motorB.provide a proper supply of fresh air for the engine（s）C.see the system is in good operating conditionD.insure at least one complete change of air in the compartments concerned
If the engine of a survival craft does not start, check to see ______.A.that the fuel valve is openB.if the air supply systen is openC.if the water sprinkler system is openD.if the limit switch in on
单选题A diesel engine is turned at normal cranking speed, but fails to fireThis can occur from （）Alow lube oil temperatureBlow starting air temperatureCair in the fuel injectionDwater in the starting air system
单选题Air in the fuel lines of a diesel engine can cause （）Aignition failureBoxygen corrosion of the fuel linesCthe pistons to seizeDblue smoke
单选题If a tow-stroke/diesel engine is over-speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?（）AMove the fuel control mechanism to the no fuel positionBBlock the fuel supply by closing the master fuel valveCShut off the fuel supply and block the flow of intake airDRelieve all pressure in the fuel system
单选题A diesel engine is turned at normal cranking speed and no ignition occursThis could be the result of （）Alow lube oil temperatureBlow starting air temperatureCair bubbles in the fuel oil systemDwater in the starting air system
单选题Outlets in gasoline fuel lines are（）.Apermitted for drawing fuel samplesBpermitted for draining fuel from linesCpermitted for bleeding air from linesDprohibited
单选题The fuel from the bunker tanks must be treated by before entering the service tanks（）, from where the fuel enters（）Acentrifugal separators; the engine cylinderBoily water separators; the engine cylinderCoily water separators; the fuel supply systemDcentrifuges; the fuel supply system
单选题The term “proper metering”, as applied to a diesel fuel injection system, can be best defined as （）.Adelivering the same quantity of fuel to each cylinder for each power stroke according to engine loadBmaintaining the metering adjustment for a reasonable period under all load conditionsCtiming fuel injection to obtain maximum power and good fuel economyDdistributing the fuel to all parts of the combustion chamber for proper combustion
单选题A safe fuel system must（）.Aprevent engine overheatingBhave proper air/gasoline fuel mixture ratioCbe liquid- and vapor-tightDsupply sufficient air to the intake manifold
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If the engine does not start on air, it may be due to （）Alow compression of the fuel pumpsBincorrect timing of fuel pumpsCthe starting air valves stuckDair-locks in fuel oil pipeline
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If the engine of a survival craft does not start，check to see（）.Athat the fuel valve is openBif the air supply system is openCif the water sprinkler system is openDif the limit switch is on
单选题When the load is increased on a turbocharged diesel engine, the amount of increased air supplied by the turbocharger will（）Alag behind the increased fuel supplied to the engineBenter the engine along with the increase in the fuelCenter the engine before the increased fuel supplyDleave the turbocharger as a negative pulse
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When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should（）Aincrease the starting air pressureBuse a higher than normal cranking speedCincrease the fuel injection pressureDuse a fuel having a lower ignition temperature
单选题A diesel engine burns （） a gasoline engine of the same capacity in the same period of time.Aas much fuel asBless fuel thanCless fuel asDmore fuel than
单选题Turbulence in a diesel engine cylinder is of major importance in providing （）.Aproper fuel meteringBcomplete fuel/air mixingCminimal fuel penetrationDproper fuel timing
单选题Air in the fuel lines to the fuel injection nozzles of a diesel engine will cause the engine to （）Aburn excessive amounts of lube oilBoverheat without smokingCoperate with reduce power or stopDrun away without load