轮机长和大管轮面试题目Word格式.docx
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轮机长和大管轮面试题目Word格式.docx
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Turningengineindicatorcocksparametersabnormalnoise
*ChecksystemFOserviceandsettlingtanksdieseloilservicetankairsystemLOsystemT/CCWsystemcheckingthefuelregulatinggear&
startingsystem
*slowturningtheengine
*thismustbecarriedouttopreventdamagecausedbyfluidinoneofthecylindersandtocheckthereversingmechanism
*Beforebeginningtheslowturningobtainpermissionfromthebridge
2whatitemstobeanalysisonlubeoil?
*SpecificgravityviscosityflashpointTAN(totalacidnumber)SAN(strongacidnumber)alkalinityTBN(totalbasenumber)watercontentConradsoncarbonashinsoluble
3whatcauseofexhausttemperaturerisesinallcylinders?
*Increasedscavengeairtemperatureowingtoinadequateaircoolerfunction
*Fouledairandgaspassages
*Inadequatefueloilcleaningoralertedcombustioncharacteristicsoffuel
*wrongpositionofcamshaft
4whatcausesofhighturbochargerspeed?
*Fouledairfilter(earlystageofunloadingthecompressor)
*Fire(earlystage)intheexhaustcheckimmediately.
5whatcausesofcylinderknocking?
*Fueltimingtoofaradvanced
*fuelinjectorvalveneedlestickingatopenposition
*Excessivecarbonbuiltuponthecrown
*Brokenexhaustvalve
*Mechanicaldamageinthe3cylinder
6whatactiontobetakenofcrankcasemistdetectoralarm(nevercutoutmistdetectorpotentiallydangerous)?
*InformbridgeandC/E
*Stayawayfromcrankcases
*slowdownandstop
*startturninggearimmediatelyforatleast30minutestocooldown
*Throughinvestigationofmistdetectorcrankcaseabnormalityandmovingpartsrequired
7whatcausedofscavengefireandactiontaken?
*Donotstandnearthereliefvalves
*slowdownengineensurethattheauxiliaryblowersareoff
*Incasethefirepersistsstoptheenginegraduallytopreventriskofpistonseizure
*Fireshouldbegooffwhenalldepositsburntout
*keepturningtheenginewithcoolingontopreventseizureofmovingparts
8whatactiontakenwhencrankcaseexplosion?
(Mostofthecasesenginewillsuddenlystopuponexplosion)
*Informbridgeandchiefengineer
*evacuatetheE/R
*Everysafeefforttobemadetoturnenginebyturninggearorslowturningfor30minutestopreventseizureofmovingparts
*Thoroughinvestigationrequiredintothecauseoftheexplosionbeforerestarting
9Whatwillyoudowhenboilerwaterlevelwaslowduringnormalsteamingcondition?
*Fiststartthestandbyfeedwaterpump
*Secondcheckandwashthelocalwaterlevelgauge
*Thirdcheckanyleakageonsteampipesorsafetyvalves
10Turbochargersurgingcausesandpreventivemeasures?
*T/Csurgingcanbedividedintothreemaincategories
*malfunctioninthefuelsystem
*Rapidvariationsintheengineload
*Fuelsystemfuelinjectionsystemfuellinecomponentsfueltiming
*exhaustsystemvalveexhaustpassagethroughturbochargerandgasboiler
*scavengeairsystem
*MiscellaneousrapidchangesinloadandRPMgovernor
*Immediateactiontemporarilycounteractedbyblowingoff
ReduceengineloadbytakingtheT/Cawayfromthesurgingline
*Preventivemeasuresregularmaintenanceofitemsmentionedabovepreventloadfluctuationsduringballastvoyageandbadweather
*PeriodicalcheckofM/Ebedplateastrengthmember
*Crossgirderunderthebearinghousing
*Boltholes
*Holdingdownboltsofslackening
*Chocks(frettingcracksandslackness)
11Turboblowermaintenanceduringoperationandchecktobemadeduringmaintenance
Importantpointsforturbochargermaintenance
●Gascasingscalingandcorrosion
●Watertreatmentisessential
●Rotorunbalanceduetoimpropercleaningoftheairsideaswellasturbinesidewheels
●Airsideimpellerusuallyhaveafilmofoilonthealuminumsurface
●Gassideinservicecleaningnecessarytopreventdepositsfromcombustionproducts
●Impropercleaningofairsideorturbinesidecouldresultinrotorunbalanceandsubsequentoperationalproblems
●Bearingsandgearpumpsshouldberepairedatintervalsspecifiedbymaker
12Dailyroutinechecksrequiredonsteeringgearsystem.
*Oilquantityintheoiltankwithinrangeoflevelgauge
*Oiltemperature
*Pressuresofhydrauliccylinderscomparingwithnormaldata
*Abnormalnoisesandvibrationfrommovingpartsandmotorcouplings
*Oilleakagesfromtankcylindervalvesrampackingandpipejoints
*Abnormaloverheatingofcylinderstuffingboxandglandsmotorampler
13Immediateaction/causesofabnormalrelatedtosteeringgearsystem.
*Rudderdoesnotrespond
*Troubleofautopilotcontrol
*Controlthesteeringgea
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