单选题Fuel oil transfer systems used onboard diesel propelled vessels are required to have ().Atwo fuel oil transfer pumps provided where one is to be independent of the main engineBtwo fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engineCengine driven transfer pumps and only used in constant speed applicationsDthe capacity of the engine driven pump exceed the consumption rate of the engine to which it is attached

单选题
Fuel oil transfer systems used onboard diesel propelled vessels are required to have ().
A

two fuel oil transfer pumps provided where one is to be independent of the main engine

B

two fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engine

C

engine driven transfer pumps and only used in constant speed applications

D

the capacity of the engine driven pump exceed the consumption rate of the engine to which it is attached


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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

Crankcase explosions in propulsion diesel engines result from ____.A.the splashing of lubrication oil by the crankshaftB.the dilution of crankcase oil with particles of combustionC.broken fuel lines spraying oil on the crankcaseD.the ignition of unburned fuel and air in the crankcase

What is NOT required to be contained in the oil transfer procedures ________.A.A line diagram of the vessel's oil transfer pipingB.The number of persons on duty during oil transfer operationsC.Any special procedures for topping off tanksD.The location and capacity of all fuel and cargo tanks on the vessel

单选题Fuel oil discharged to the diesel engine cylinder is atomized at the ()AturbochargerBinjection nozzle tipCcarburetorDfuel oil pump

单选题Load control on a diesel engine is accomplished by ().Aregulating the speed of the turbochargerBrotating the fuel injector pump plungerCregulating the speed of the fuel oil transfer pumpDchanging engine timing

单选题Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of ().Afuel oil vapor at the sludge tank ventBunburned fuel vapors in the scavenge air receiverClube oil vapors in the crank caseDlube oil vapors in the engine room

单选题When fuel oil has seriously contaminated a diesel engine lubricating oil, you should ().Afilter to remove the fuel oilBuse the settler to remove the fuel oilCremove the fuel oil by centrifugingDdrain and then renew the lube oil supply

单选题The sludge tank installed in the diesel engine room is used to collect() Ⅰ.sludge from the fuel oil settling tanks ad centrifuge Ⅱ.water that has been collected in the settling tankAⅠonlyBⅡ onlyCbothⅠand ⅡDneitherⅠor Ⅱ

单选题Duty officer informs us that the vessel is out of harbor and in “Full Ahead”We are going to run ().Adiesel oil instead of fuel oilBfuel oil instead of diesel oilCdiesel oil instead fuel oilDfuel oil instead diesel oil

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单选题Crankcase explosions in propulsion diesel result from()Athe splashing of lubrication oil by the crankshaftBthe dilution of crankcase oil with particles of combustionCbroken fuel lines spraying oil on the crankcaseDthe ignition of unburned fuel and air in the crankcase

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Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means of stopping the machinery from ().Awithin the space concernedBoutside the space concernedCthe throttle stationDwithin the fire room

单选题Proper filtering and straining of diesel fuel is important because the()Afuel oil pump will over-speed if dirt is not removedBfuel oil transfer pumps cannot tolerate small amounts of grit in the oilCfuel injectors may be damaged by foreign particles in the fuel oil dirtyDfuel will clog the intake air filter

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

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单选题Faulty operation of diesel engine fuel injection nozzles can be directly caused by ().Awater in the fuel oil supplyBexcessive fuel nozzle holder coolingCa distorted fuel spray patternDleakage past the plunger into the oil drain

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After the ship is out of the harbour and in “Full Speed”, well change ().Ato fuel oil instead of diesel oilBfor fuel oil instead of diesel oilCto diesel oil into fuel oilDfor diesel oil into fuel oil

单选题Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce().Acold corrosion of the nozzlesBfuel viscosity for better atomizationCcarbon accumulation on the nozzlesDfuel detonation in the cylinders

单选题Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?()ASplashBGravityCPressureDBypass

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单选题Fuel oil transfer systems used onboard diesel propelled vessels are required to have ().Atwo fuel oil transfer pumps provided where one is to be independent of the main engineBtwo fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engineCengine driven transfer pumps and only used in constant speed applicationsDthe capacity of the engine driven pump exceed the consumption rate of the engine to which it is attached

单选题Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires()Agrinding the spare plunger to the barrelBreplacing the plunger and the barrelChighly polishing both the plunger and barrelDreplacing plunger only

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单选题When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?()AThe diesel oil must never be allowed to mix with the heavy fuelBThe temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valveCThe heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valveDThe heating steam must be secured before the diesel oil passes through the three-way valve

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