单选题When centrifuging heavy fuel oil, an important factor to consider is the () (1) flow rate (2) viscosity of the fuel oilA(1) only is correctB(2) only is correctCboth (1) and (2) are correctDneither (1) or (2) are correct

单选题
When centrifuging heavy fuel oil, an important factor to consider is the () (1) flow rate (2) viscosity of the fuel oil
A

(1) only is correct

B

(2) only is correct

C

both (1) and (2) are correct

D

neither (1) or (2) are correct


参考解析

解析: 暂无解析

相关考题:

Have you ever served the auxiliary engine to combustion heavy oil? What should be borne in mind when transferring oil; from heavy oil to light oil?

Which factor determines the ring dam size for a fuel oil, tubular bowl type, centrifugal purifier?A.The viscosity of the fuel.B.The quantity of water to be removed from the fuel.C.The specific gravity of the fuel.D.The quantity of dirt to be removed from the fuel.

When the ships is going to enter into the harborA.change from heavy fuel oil to diesel oil for main engineB.pumping out bilge waterC.change sea chest form high level one to lower level oneD.test emergency generator

Injectors for use with heavy fuel oil must be cooled by either water or light oil to_____.A.prevent heat corrosion to internal componentsB.increase fuel delivery rate and economyC.prevent pre-ignitionD.avoid carbonization of the nozzle tips

When an auxiliary boiler is panting and emitting(发出) black smoke, you should______.A.increase the fuel oil temperatureB.decrease the fuel oil temperatureC.decrease the fuel oil supply pressureD.increase the air supply

Which product is volatile ________.A.BenzeneB.Diesel fuelC.Coal tarD.Heavy industrial fuel oil

单选题When the ship is going to enter into the harbor,()Achange from heavy fuel oil to diesel oil for mail engineBpumping oil bilge waterCchange sea chest form high level one to lower oneDtest emergency generator

单选题When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?()Acold fuel oilBlow fuel oil pressureClow atomizing steam pressureDwater in the fuel oil

单选题In discussing oil pollution, one important fact to remember is that the problem remains the same () heavy () light oil is spilled into the water.Aboth;andBwhether;orCneither;norDbecause;so

单选题Heavy residual fuel oils are heated prior to centrifuging to ()Areduce fuel weightBincrease specific gravityCseparate fuel from lube oilDreduce fuel viscosity

单选题A viscosity regulator used for an engine is usually provided in order to () for an engine burning heavy fuel oil.Aregulate the fuel supplyBmaintain a constant fuel viscosity at the fuel valvesCmaintain efficient coolingDalter the fuel density

单选题Which of the following is a factor of fuel oil almost having nothing to do with the formation of combustion products?()Asetting pointBashCsulfur contentDcarbon residues

单选题When an auxiliary boiler is panting and emitting black smoke, you should ().Aincrease the fuel oil temperatureBdecrease the fuel oil temperatureCdecrease the fuel oil supply pressureDincrease the air supply

单选题Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?()ASludgeBGasolineCFuel oilDLube oil

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When preparing a ship for heavy weather,fuel oil day tanks should be().Apumped overboard to calm the seasBdrained to the lower hull to reduce free surfacesCfilled to ensure that sufficient fuel oil is available during a lengthy emergencyDpartially drained to increase free surfaces in order to reduce motions

单选题What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?()AWhiteBBlackCBlueDClear

单选题Injectors for use with heavy fuel oil must be cooled by either water or light oil to ()Aprevent heat corrosion to internal componentsBincrease fuel delivery rate and economyCprevent pre-ignitionDavoid carbonization of the nozzle tips

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Why is it important for fuel oil tanks not to be topped off at the inner bottom level when loading on a cold day?()AIncreased viscosity of the product needs higher loading pressure, which increases the chances of a spillBAir pockets may cause the fuel to bubble out of the ullage holeCThe temperature rise of the fuel will cause an overflowDFueling valve may become stuck closed and cause the fuel oil to spill before the valve can be opened

单选题The amount of expansion space to be left in a fuel tank when fuel oil is being received, is determined by the ().Aquantity of fuel to be receivedBflash point of the fuel as it is receivedCfuel temperature as it is receivedDviscosity of the fuel being received

单选题Heavy soot accumulations in an auxiliary boiler could be caused by()Awater in the fuel oilBexcessive cyclingChigh fuel oil pressureDimproper burner maintenance

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

单选题When the heavy fuel oil is heated to achieve the viscosity of 10-15 cst, may occur.To avoid this, a system is used in most occasions()Aboiling and cavitations; low temperatureBboiling and cavitations; pressurizedCleaking and boiling; low temperatureDleaking and boiling; pressurized

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

单选题When the ships is going to enter into the harbor,().Achange from diesel oil to heavy fuel oil for mail engineBpump out bilge waterCchange sea chest form lower level one to high level oneDtest emergency generator