kumpulan soal Pra-Prala CBA stabilitas

Halo guys salam jalesfeva jayamahe !!!!

saya kasih latuhan soal buat kawan-kawan pra-prala ANT-III mode CBA,hanya untuk belajar ya guys.

soal tidak saya isi supaya kawan-kawan bisa mempelajari dan mengerti..


1.     Foracontainerstowedinapositionequidistantfromtherollandpitchaxesofa ship, what will quarterthe acceleration forces acting on it?
A. Doubling theroll period
B. Doubling thepitch period
C. Halving the rollperiod
D. Halving the pitch period



2.   How areship's stability characteristics affected byParametric Rolling?

A. Bytheconstant changeof underwaterhullgeometryas waves travel past the ship
B. Bythe virtual loss of GM

C. Bythe development of anegativeGM
D. Byan increasein the angle ofpitch


3.   What does heaving resultin?

A. Vertical accelerations acting along container corner posts

B. Shearing of container twistlocks

C. Longitudinal accelerations acting on hatch pontoons

D. Tipping of containers



4.   What is the disadvantageof using High TensileSteel (HTS) in ship construction?

A. Enhanced vibration in HTS areas

B. Failurewithoutwarning

C. Lowelasticity

D. Diminished cargo carrying capacity



5.   What is the primarycauseof fatiguedamageto thehullgirder?

A. Thenumberofrepeated stress cycles

B. Repeated plasticdeformation ofthe hull

C. Panting stresses

D. Resonant rolling


6.     What  rollamplitudeis  generallyused  byclassification  societies  in  calculating rolling forces?
A. 24 -30 degrees
B. 37 -42 degrees
C. 30 -36 degrees
D. 18 -24 degrees


7.   What would indicate theonset of ParametricRolling?

A. Whenthewaveencounterperiodapproachesthenaturalrollperiodofthe ship
B. Whentwicethewaveencounterperiodapproachesthenaturalrollperiodof the ship
C. When waveheights experiencedfrom eitherquarter exceed 6 meters

D. When waveheights experiencedfrom thebows exceed 6 meters



8.   When do vertical accelerations acting on containers reach theirmaximumvalues?

A. When aship changes direction at its extreme angleof pitch

B. When aship is at its extreme angle ofpitchand rollsimultaneously

C. When aship surges

D. During resonant rolling



9.   When does wind forcecauseheeling moments on a container ship?

A. When the on-deck containers present a certain profileto thewind direction

B. Whenever wind speeds exceed 60 knots

C. Whenever wind speeds exceed 70 knots

D. When on-deck containersareblock-stowed



10.  Whywould averylargecontainer vessel pitch morethan afeeder vessel?

A. Becausepitching varieswith ship’s length

B. Because very large container vessels are more exposed to open sea conditions
C. Becausevessel pitching varies withpropeller pitch
D. Becausecontainerstacksonlargecontainervesselsaremoreexposedto wind forces

11.  ABulkVesselistoloadacargoofgrain;preloadingcalculationsshowthat IMO

stabilitycriteriacannot be achieved; thevessel should do which ofthefollowing?

A. Thegrainsurfacesinsomeorallofthecargo spaces must be secured
B. The cargo can still be loaded

C. An exemption certificatemustbe applied for

D. An exemption certificatemustbe applied for



12.    A loaded bulk carrierexperiences heavyiceaccretion on deck forward, what arethe major concerns ofthechanges in stability?
A. Reduction ofmetacentric height (GM) and loss of freeboard forward
B. Excessivetrim bythe stern

C. Increasein metacentricheight(GM)

D. Reduction ofspeed andadditional fuel consumption




13.    Afterdischargingahighdensitycargoaseriouscrackisfoundinanupperballast tank amidships of aBulk Carrier; what must theMasterdo?
A. Inform DesignatedPerson Ashore (DPA)   and call inClassification Society

B. Notethe dimensions of the crack andmeasureregularly

C. Proceed on ballast voyagewithoutballast in this tank

D. Repairwithcementboxortemporaryweldedpatchuntil next drydock


14.    Inasinglesideskin bulkcarrier of 155m in length constructedin 2000 and carrying cargoofdensity 1010kg/cu.m.,whichcargoholdshouldbeabletowithstand flooding?
A. Anycargo hold

B. Theforemost cargo hold

C. The aftermost cargo hold

D. Themidships cargo hold


15.    Inasinglesideskin bulkcarrier of 180m in length constructedin 2001 and carrying cargo  of  density1,780 kg/m3, or  above, which cargo  hold is strengthened to withstand flooding?
A. Theforemost cargo hold
B. The aftermost cargo hold
C. Themidships cargo hold
D. Theballast hold


16.    Large bulkcarriersaremorelikelytosuffer fromcracksinstructureinwhichofthe following parts ofthe vessel?
A. Around hatchcorners and upper ballast tanks amidships

B. In number 1 and number2 holds

C. Inafter peakarea

D. On bottomplating in theafter part ofthe vessel



17.    OnaholdinspectionofaBulkCarrieritisnotedthatanumberoftransverseframe beam kneesareslightlydistorted; what is the significanceof this?
A. Thisindicatesthevesselissufferingrackingstressandis potentiallyserious
B. There arenoconcerns with  this observation

C. This is an indication ofexcessivebending moment stress

D. Thedistorted areas should bepainted



18.    Thevesselisinstructedtoloadalternateholdswhencharteredtocarryahigh densitycargo. What reasons could be given bythe masterto refuseto do this?
A. IMO donot recommend alternate loading of cargo holds with high densitycargoes.
B. Thetrim of thevessel willnot be satisfactory.

C. Cargo spacecleaning after discharge will be excessive.
D. Thesummerdeadweightwillnot be achieved.


19.    Whataretheeffectsofabulkvesselloadingahighdensitycargoresultingina largemetacentricheight(GM)?
A. Have afast roll period and possibly suffer racking stresses
B. Haveaslowroll and largerighting levers

C. Haveaslowroll and verysmall righting levers

D. Suffertorsionalstressesandhavesmallrighting levers


20.    Whatdifferencesindesignaretherebetweenastandardcargoholdandacargo hold which can also be used forballast on aBulkCarrier?
A. Theballast  hold  hatchcovermust    befitted with additional securingdevices
B. Thereis no differences indesign

C. This hold does not haveventilators

D. Thecoamingsaremuchlowerontheballast hold


21.  What must bycarefullychecked when loading abulk carrier to maximum draft

A. Theminimum bow heightmustbemaintained

B. Thevessel is trimmed bythe stern on completion,
C. Thevessel is trimmed bythe head on completion
D. Thevessel should haveastern trim of 2.0 metres bystern.




22.    Whatwouldacrackedcross-deckplatingfoundduringaloadedpassageonabulk carrier indicate?
A. That shearforces havebeen exceeded

B. That thevessel is dueforsurvey

C. That failureof theshellplating is imminent

D. That bulkhead failureis imminent


23.    Which  of  the  below  structures  of  bulk  carriers  are consideredcritical?
A. Upper and lower connection of main sideframes

B. Longitudinal deck plating outside hatches

C. Thegirders
D. Forecastledeck



24.    Whichplanshowsthepositionoftheverticalandlongitudinalcentresofgravityfor eachcargocompartmentof aBulk Carrier?
A. Vessel stabilitybook

B. Line drawing
C. CapacityPlan
D. Shellexpansion


25.    Whichplanshowsthepositionoftheverticalandlongitudinalcentresofgravityfor eachcargocompartmentof aBulk Carrier?
A. Vessel stabilitybook

B. Line drawing
C. CapacityPlan
D. Shellexpansion


26.    A chemical tanker intended to transport products with appreciably severe environmentalandsafetyhazardswhichrequiresignificantpreventativemeasures toprecludeescapeofsuchcargo,usuallyofdouble-hullconstruction,withavariety of tank sizes / capacitiesis rated as:
A. A typeIIchemical tanker, as per theIBC Code.
B. A typeIchemical tankeras per theIBC Code.
C. A parcel chemical tankeras per theIACSConstruction Regulations.

D. Achemicaltankerforthepurposesofthe1996IMOdirectiveMEPC/2.12 circ.OnMandatoryReportingRequirementsforShipsCarryingDangerous
orPolluting Goods.


27.    A cofferdam, a pumproom or an empty tank, located between cargo tanks containingcargoes or cargoresidueswhichmightreactwitheachother ina hazardous manner,are allacceptable methodsof segregationinchemicaltanker stowageaccordingtotheIBCCode. Forthispurpose,itmay alsobeacceptableto have:
A. Aninterveningcargotankcontainingamutuallycompatiblecargoorcargo residues.
B. A common bulkhead, provided it is at least 10 mmthick.

C. Acommonbulkhead,provideditoverlapsforlessthan15%of thelengthof the bulkhead on the larger tank.
D. A cruciform joint, separating two tanks diagonally.



28.    As perIBCCode, the information contained inthe loading andstabilityinformation booklet, which must be supplied to themaster of achemical tanker, shallinclude:
A.  Detailsoftypicalserviceandballastconditions,provisionsforevaluating other conditions   of loading   and   a summary of the ship's   survival capabilities, togetherwith sufficientinformation to enablethe mastertoload and operatethe ship in asafeand seaworthymanner.
B. Summarydetailsoflightshipandfullyloadedconditionsandofa representative  part-loaded  condition, with examples of  calculations of typicalpre-departurestability conditionsandanexampleofa damage stability calculationtoenablethemastertodeterminesurvivalcapabilityin the event of anemergencyinvolving a breach of thehull.
C. Certificates  confirming  the   testing  and  calibration  of   tank   gauging equipment,theship'sstability computerprogramandtheaccuracyofdraft and loadline marks.
D.  Detailsofserviceandballastconditionsforloadingbasedontherangeof productswhicha vesseliscertifiedtocarry,incorporatingthe maximum permissibleDWT,themaximumpermissible SGofany product,the maximumpermissibletrimandanystructuralconstraintsthatwillimpacta
loadingcondition.


29.    As per theIBC Code, anindependent tank on achemical tanker is definedas:
               A. Onewhich is not contiguous with, orpart ofthe hullstructure.
B. Onewhichformspartoftheship'shullandstructureandwhichisnormally essential to thestructuralcompleteness of the ship's hull.
C. OnewhichisnotsubjecttotherequirementsoftheIBCCodeinrespectof the loading and carriageof hazardous liquid cargoes.
D. Onewhichcanbeloadedwithhazardousliquidchemicalsthatcannotbe carried in integral cargo tanks.


30.    Notcountingactualcapacityorstructuralandcargospecificlimitations,theIBC Codestates that forasingle tank on atype3 chemical tanker:
A. Thereis no applicable filling restriction.

B. A restriction of 1250 cubic metres shall apply.
C. A restriction of 3000 cubic metres shall apply.
D. A restriction of 1750 cubic metres shall apply.


31.  Since1stJanuary 2007,asperchangesintroducedbyamendmenttoMARPOL and

IBC Code, ithas becomemandatoryforvegetableoils to be carried in:
A. Doublehulltankers.
B. Integral cargo tanks only.

C. Tanks fitted with heatingcoils or in-lineheat exchangers only.
D. IMO typeIIchemical tankers only.


32.  Thedesignpressureforacargocompartmentonachemicaltankertomeetthe

definitionand requirements of apressuretank”mustbe:

A. Greater than 0.7 bar gauge.
B. Less than0.7 bar gauge.
C. At least 1.0 bar gauge.

D. At least 2.1 bar gauge.


33.    AGeneralCargovesseldevelopsanangleoflollwhileloadingaheavyitemof deck cargo alongside thejetty. You should immediately:
A.  Stopcargo,reduceFSEintanks,lowerweights withinvesselandfillsmallballasttankonlow side of vessel.
B.  Stopcargo,reduceFSEintanks,lowerweights withinvesselandfillsmallballasttankonhigh side ofvessel.
C. Stopcargo,increase FSEintanks, lowerweights withinvesselandfill small ballast tank on high sideof vessel.
D. Stopcargo,increaseFSEintanks,lowerweightswithinvesselandempty small ballast tank on low sideof vessel.


34.  A General Cargo vessel is deemed to becargo worthywhen:

A. Thehatch covers and/orhatch pontoons are weather tight.
B. All her certificates areinorder.
C. Thevessel's SafetyConstruction Certificate is valid.

D. Thehatch covers and/orhatch pontoons are watertight.



35.    A generalcargo vessel is loading to its Summer Marks. Upon completionof loading, the final level ofthe waterwould be at:
A. Thetop of thesummer load linemark.

B. Thebottom of thesummerload line mark.
C. Thetop of thewintermark.
D. Themid pointbetween thesummer and the tropical mark.



36.    A general cargo with alargemetacentricheight (GM)would be expected to have:
               A. A fast rollperiod and largerighting levers (GZLevers).
B. A fastroll period and small righting levers (GZ Levers).
C. A long rollperiod and largerighting levers.
D. A longroll period and small righting levers (GZ Levers).


37.    Whenloadingheavyliftcargoesonageneralcargovessel,positivestabilitycanbe maintained by:
A.  Completelyfillingtheship'sdoublebottom tanks            andcontinuously  monitoring  the loading operation.
B. Completely fillingthosedoublebottomtanks belowthecargoholdwhereheavy cargois being loaded.
C. Monitoring the vessel's stability during the loading operation and not allowing the vessel to liston the side ofthe load.
D. Listing thevessel to theopposite sideto which theload is being lifted.



38.    Which type of material is normally used in the construction of a cargo tank designed for transportingLPG at atmosphericpressure?
A. Carbon-Manganesesteel.
B. 9%Nickel steel.
C. Stainless steel.
D. Aluminium.


39.    AnOiltankerexperienceslargebendingmomentsandthereforethedeck scantlings mustbemaintained within "x"length amidships, where "x"is:
A. 0.4Length

B. HalfLength

C. 0.6 oftheLength

D. Quarter of theLength



40.    AsperMARPOL,theformulaforcalculatingtheminimumdraftamidshipsfor crudetankers in ballast condition is:
A. 2.0 +0.02L
B. 2.0 +0.002L
C. 2.0 +0.15.l
D. 2.0 +0.0015L

41.  What arethe main elements in adamage control plan?

A.  Boundaries ofthe watertight compartments for decksandholds.Positionof controlsfor opening andclosingof watertightcompartments.Arrangement forcorrection oflist due to flooding.
B. Arrangementsforcorrectionof listdue toflooding within 15 minutes
C. Instructionsandproceduresforreportingdamage to theCompany
D. A damagecontrol plan is thesame as anemergencyplan



42.    Whatarrangementmaybeinstalledinpassengershipstoreduceunsymmetrical flooding in damaged condition?
A. Cross flooding arrangement

B. Ballast trimming system

C. Separate trim tanks

D. Self acting ballast trimming arrangement



43.    WhatisthefullnameoftheInternationalConventiondealingwithstabilityof passenger ships?
A. TheInternational Convention for theSafetyofLifeat Sea

B. SOLAS

C. International SafetyManagement code

D. ISPS



44.  What is the resultof alargemetacentricheight?
A. Theship willroll violently.

B. Theship willhavealongroll period.
C. Bending moment willincrease.
D. The center ofgravitywillmove upwards.


45.    Alongoblongspaceaswouldbefoundinanafterupperdeck.Conventionalreefer vesselsareusually designedwithfinelinesandlargeflaredbows.Consequently,in adverseweatherconditions,especially fromforwardofthebeam,thenavigating officers need to be mainlyawareof which of thegiven options?
A. Thistypeofvesselispronetolargehulldeflectionswhichmayresultin structural damage.
B. Thatthemainenginegovernormay notbeeffectivewhenthevesselpitches heavily.
C. That thebow is ideal forkeeping theforward decks dryand clear ofwater.
D. Thatthevesseldesignmeansthathighspeedscanbemaintainedandthe
perishablecargo can bedelivered in good condition.



46.    Earlier cellular reefer vessels were constructed with a 'porthole system' for supplyingrefrigeratedairvia ductingtocontainers.Modern vesselsaredesignedto supply only electricalpowertointegralcontainers.Selectthemainreasonforthis changein design to the vessels and containers from theoptions given.
A. The  'porthole'  system  design  was extremely complexandconstructioncosts werehigh.
B. Ductedcontainershadtobetranshipped to theirfinal destination after discharge
and still required refrigeration for that part of thesupplychain

C. Alargeamountofrefrigerantgaswasrequiredtooperatethe'porthole' system.
D. Theintroductionofmorepowerfuldieselenginesontothesevesselsmeant

theyhad sufficientelectrical capacityto supplytheintegral type containers.


47.    Ifproperlysecuredwhatbenefitsdohighsidedcarcarriershaveoverothership types regarding seaworthiness?
A. They canroll to very large angles without taking in water
B. Theyarenot easilydamaged in heavyweather

C. Their   large   reserve   buoyancy   prevents capsizing
D. They canpitch to very large angles without taking in waterviatheramp doors


48.    Onarorovessel,inadditiontolongitudinal,transverseandverticalaccelerations whatelsemustbetakenintoaccountwhencalculatingtheexternalforcesactingon a cargo unit?
A. Longitudinal and transverseforces bywind pressure

B. Longitudinal and verticalforces bywind pressure

C. Vertical and transverseforces bywind pressure

D. Longitudinal forces byseasloshing



49.  What special design featureis attributed tororo vessels which areonlycarcarriers?

A. A verylargewindage area

B. A stern ramp

C. Solid ballast

D. A smallGM when fullyloaded



50.  When willaro-ro vesselpitch heavily?

A. When wavelengths areequal to the ship's length

B. When wavelengths areequal to twicethe ship's length

C. When wave lengths areequal to half theship's length

D. Inconfused seas






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