单选题The desirable properties of a marine fuel oil should include()Ahigh flash point and high viscosityBlow flash point and high viscosityClow heating value and high sulphur contentDhigh heating value and low sulphur content

单选题
The desirable properties of a marine fuel oil should include()
A

high flash point and high viscosity

B

low flash point and high viscosity

C

low heating value and high sulphur content

D

high heating value and low sulphur content


参考解析

解析: 暂无解析

相关考题:

The desirable properties of a marine fuel oil should include .A.high flash point and high viscosityB.low flash point and high viscosityC.low heating value and high sulphur contentD.high heating value and low sulphur content

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

The main propulsion diesel continues running after you try to shut down. You should now attempt to .A.stop the fuel oil booster pumpB.engage the jacking gearC.secure the lube oil pumpD.shut off the fuel at the settling tank

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 statement is TRUE of a gasoline spill ________.A.It is visible for a shorter time than a fuel oil spillB.It is not covered by the pollution lawsC.It does little harm to marine lifeD.It will sink more rapidly than crude oil

单选题If the overflow tank high-level alarm sounds while the fuel oil tanks are being topped off, the engineer should ().Aclose the static leg filling valveBclose the overflow tank falling valveCreduce the fuel oil pumping rateDstop the fuel oil pumping operation

单选题Before starting a diesel engine, you should always()Acheck the pyrometer readingsBcheck the crankcase oil levelCcheck the fuel oil strainersDclean the fuel system

单选题When you are transferring fuel oil to the setting tanks, precautions to be observed should include ()Aplugging gooseneck tank vents to prevent accident overflowBmaintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow lineCsounding the tanks frequently and reducing the transfer rate as the level approaches maximum fillDmaintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the ship

单选题Properties of a good refrigeration oil include()Alow wax contentBhigh pour pointChigh viscosityDall of the above

单选题If a fire ignites in the engine room as a result of a high pressure fuel oil leak, you should FIRST ().Asecure the ventilationBfind a soda acid extinguisherCshut off the fuel oil supplyDsecure the generator

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Your vessel has run aground and upon taking fuel oil tank soundings, you find that a fuel tank level has increasedYou therefore should suspect ().Acondensation in the fuel tankBa crack in the hull portion of the fuel tankCa load of bad fuelDcontamination from the saltwater flushing system

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For optimum results, centrifugal purification of heavy fuel oil should be accomplished with the fuel at the lowest practicable()AthroughputBadditive percentCcetane numberDTBN number

单选题In a marine diesel engine the oil sump is ().Ajust below the crankcaseBthe oil cup for the exhaust valveCthe pan for collecting drain fuel oilDoil circulating pump

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After taking on fuel oil, the hoses should be disconnected and ().Adraped over the fantail to dry outBdrained over the side and washed outCdrained into the bilges and washed outDdrained into buckets or fuel tanks

单选题If it becomes necessary to cutout an individual cylinder of a large, low-speed, main propulsion diesel engine, the fuel to that cylinder should be secured and its ()Afuel pump should be removed and all connections blanked offBcylinder oil feed rate should be increased slightly above that used at normal sea speedCcylinder oil feed rate should be reducedDcylinder oil feed rate should be increased to the maximum flow capable of the metering pump

单选题If fuel oil were being discharged from the waster outlet of a fuel oil disk type centrifuge, operated as separator, you should()Aremove the discharge ringBre-prime the purifierCthe centrifuge to its proper speedDinstall an additional discharge ring

单选题The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated ()Afor atomizingBfor centrifugingCin a storage tankDin the re-circulating line

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If a used lube oil analysis indicates excessive fuel dilution, the lube oil should be ()AchangedBcentrifugedCfilteredDsettled

单选题When the incinerator is stopped, which of the following is wrong?()AAfter stopping supplying sludge oil, the value and pipe should be flushed by flushed by diesel oil and the incinerator continue burning for 10 minutesBClose auxiliary burner firstly and then close main burnerCAfter stopping fuel, restoring the position of main fuel supply valveDStop blower as soon as stopping supplying fuel oil

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