单选题Heavy fuel oils generally have an upper average ash content of 0~1% by weight.Which of the following conditions could be expected if the ash content increase above this amount?（）AGlazing of the cylinder linersBIncrease valve wearCExcessive oil pumpingDIncrease fuel consumption
单选题
Heavy fuel oils generally have an upper average ash content of 0~1% by weight.Which of the following conditions could be expected if the ash content increase above this amount?（）
A
Glazing of the cylinder liners
B
Increase valve wear
C
Excessive oil pumping
D
Increase fuel consumption
参考解析
解析：
暂无解析
相关考题：
Main engines as well as auxiliary engines operating on heavy fuel should have continuousoon the lubricating oil, either according tothebypass or batch principles A.filteringB.centrifugingC.depositingD.operating
The pour point of lubricating oils is affected the most by which of the following?A.Extensive centrifugingB.Wax contentC.Water contentD.Acid content
Which statement about general average is TRUE ________．A.Damage to a ship must have been incurred while the ship and/or its machinery was being used for its intended purposeB.Property must have been sacrificed or an expenditure of money incurredC.The loss or damage to deck cargo due to heavy weather constitutes general averageD.Of the ship，the freight，and the cargo interests，only one need be involved
Heavy fuel oils when spilled are ______.A.more harmful to sea life than lighter oilsB.easier to clean up than lighter refined oilsC.less harmful to sea life than lighter oilsD.not a real threat to marine life
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The burning of fuel oil in a diesel engine having a high sodium content, will cause （）Acorrosion and grooving of exhaust valvesBcorrosion and gumming of the fuel injection pumpCsalt deposits in the exhaust manifoldDslag deposits in the fuel injection equipment
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（）should generally best for handing acids,alkalis,various types of oils,solvents and chemicals in general.AHeat-resistant glovesBRubber glovesCPVC glovesDLeather gloves
单选题The treatment of the fuel oils involves storage, heating, filtering and（）AcentrifugingBpressurizingCatomizationDigniting
单选题To assist separation of low viscosity oils steam coils or electric heaters are fitted （） of the oily water separator.Ain entranceBin exitCin the upper partDon the outside
单选题Black smoke exhausting from an operating diesel engine can be caused by （）Afuel dribbling from leaking fuel injectorsBburning fuel with a high carbon contentCburning fuel with a high vanadium contentDburning fuel with a lower sulphur content
单选题Heavy fuel oils when spilled are（）.Amore harmful to sea life than lighter oilsBeasier to clean up than lighter refined oilsCless harmful to sea life than lighter oilsDnot a real threat to marine life
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Main engines as well as auxiliary engines operating on heavy fuel should have continuous on the lubricating oil, either according to the bypass or batch principles（）AfilteringBcentrifugingCdepositingDoperating
单选题The ash content of a fuel oil is significant to the operating engineer because it （）Ais an indication of the amount of noncombustible material present in the oilBindicates the quantity of energy released by burning a unit amount of the fuelCis useful for determining proper atomization temperaturesDreflects the overall thermal efficiency of the fuel oil service system
单选题An oil water monitor is required in order to measure （）.Athe oil content in waterBthe water content in fuel oilCthe water level in bilge wellDthe oil level in bilge well
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A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）Alow TBN valueBhigh alkaline reserveClow flash pointDhigh pour point
单选题Those generally used additives for cooling water are either anti-corrosion oils or inorganic（）.AgasesBpaintsCinhibitorsDdetergent
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The pour point of lubricating oils is affected the most by which of the following?（）AExtensive centrifugingBWax contentCWater contentDAcid content
单选题One engine manufacturer recommends heavy fuel oil should not be heated above 80℃ to 95℃ (176 ℉ TO 203℉) before purificationThis upper limit should be observed to ensure against（）Aflattening of the bowl neoprene O-ringsBoperation within the explosive rang of the fuelCexcessive purifier operating pressuresDexcessive oil viscosity
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（） fuel oils （） lubricating oils require treatment before passing to the engine.ABoth；andBNeither；norCEither；orDBoth；or