L03 Structures Flashcards

1
Q

What are the requirements for surveying the external hull bottom plating on a passenger vessel?

A

Hull bottom inspections should be carried out once a year with two required to be out the water in a 5 year period no less than 36months between one another.

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2
Q

What are the requirements for surveying the external hull bottom plating on a cargo vessel?

A

Hull bottom inspections should be carried out twice every 5 years and not exceeding 36 months with one tanked place out of the water.

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3
Q

What are the requirements of a hull bottom survey conducted in the water?

A

(MGN 546) the in water survey must be in the middle of the 5 year period if agreed with by the classification society.

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4
Q

What is the Harmonised System of Survey and Certification (HSSC)?

A

The IMO adopted the HSSC to deal with issues caused regarding survey dates and intervals between surveys and to cover international maritime institutions. (SOLAS and LOAD LINE Survey).

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5
Q

Name seven types of HSSC surveys.

A

-Initial Survey.
-Annual Survey.
-Periodical Survey.
-Intermediate Survey.
-Inspection of the outside of the ships bottom.
-Renewal Survey.
-Additional Survey.

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6
Q

What is tested in a Cargo Ship Safety Equipment survey?

A
  • Fire Safety Systems.
  • LSA Appliances.
  • Navigational equipment.
  • Pilot embarkation arrangements.
  • Nautical publications.
  • Lights and shapes.
  • Sound signals.
  • Distress signals.
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7
Q

What is conducted in a load line Annual survey?

A

-Load line Marks.
-Cargo hatch covers.
-Air pipes.
-Ventilators.
-Bulwarks and guardrails.
-Doors.
-Sounding pipes.

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8
Q

What documentation must be forwarded to the dry-dock manager prior to the ships arrival?

A

-Docking plan.
-General Arrangement Plan.
-Shell Expansion Plan.
-Fire Fighting Equipment Fire Protection Plan.
-Capacity Plan.
-Tank Plug Plan.
-Repair list/Dry Dock Specification.
-Stability plan.
-General Particulars.
-Gas Free Certificate.
-Cargo Plan and Manifest if docking with cargo onboard.
-Rigging Plan.
-Bilge/Ballast and cargo piping arrangement plan.
-Certificates in readiness for any surveys to be conducted.

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9
Q

What are some of the perpetrations made before entering to dry dock to make the process more safe?

A

-Minimal bunkers onboard.
-Bilges to be flushed out prior.
-Tanks to be ballasted for docking condition.
-All tanks and cofferdams must be sounded and recorded.
-All heavy weights should be secured prior to docking.

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10
Q

What are some of the general precautions to be undertaken on board the vessel whilst in dry dock?

A

-Escape routes clearly labelled and not blocked.
-PPE to be worn by all ships personnel as appropriate.
-PTW to be enforced.
-No fuel transfers to be taken place.
-Safety lamps to be used.

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11
Q

Why is it important to have the boat trimmed slightly by the stern when entering drydock?

A

The stern frame and
surrounding structure are specially strengthened to accept the forces exerted on it during dry-docking but there will be a maximum limit that must not be exceeded.

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12
Q

What information is found in a Shell Expansion Plan?

A

-Holds and their capacity.
-Tanks
-Transverse cross section at amidships.
-Machinery spaces
-Pump rooms
-Engine room
-Table of Ships Particulars.
(All in a sectional view)

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13
Q

What is a ships general arrangement plan?

A

-A profile view of which includes: engine room, pump room, other machinery spaces, bulkheads, mast and mast housing.
-Series of plan views showing each deck.

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14
Q

What information is contained in a Fire Arrangement/Control Plan?

A

-Location of muster stations.
-Emergency exits from accommodation spaces.
-Location of fire dampers, accommodation ventilation system and emergency stop for generators.
-Location of ICS and emergency lockers.

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15
Q

What is the purpose of a Fire Arrangement/Fire Control Plan?

A

-Pinpoint location and assess danger.
-Identify equipment
available at the location.
-Checking equipment during a safety audit.

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16
Q

What information is found in a Capacity Plan?

A

-Provides frame numbers, Derrick/crane capacities and maximum radius.
-Hatchway dimensions, tanks, machinery spaces.

17
Q

What are two uses of the Deadweight Scale?

A

-For estimating the additional draught in result of extra loads.
-To observe deadweight against draft.

18
Q

What is the purpose of a rigging plan?

A

Shows in detailed information the operational aspects of the ships lifting appliances.

19
Q

What information is displayed in a rigging plan?

A

-Location and SWL of all Cranes, Derricks, Store cranes etc.
-Location of all Mast Stays.
-Location and SWL of lifeboat davits, pilot hoists etc.
-timber lashings (if has timber load lines).

20
Q

What are two uses of a Rigging Plan?

A

-Lifting cargo on a geared vessel.
-Securing cargo for voyage .

21
Q

What information is found in a dry dock plan?

A

-Location of all transverse and longitudinal bulkheads, frames and intercostals.
-Location of echo sounder transducer.
-Location of sea chest.
-Location of bow and stern thrusters, stabiliser fins, anodes, reference cells or electrodes.
-Location of Bottom plugs, pad eyes for hanging off rudder and propeller.

22
Q

How does electric arc welding work?

A

-When the circuit is complete, an electric current will flow.
-The electrode is then withdrawn a short distance where the current flows across the gap due to the formation of an electric arc which generates heat.
-Ark is formed by the spark which occurs when the electrode is withdrawn.
-Heat generated by the arc melts the metal over a small area and allows for it to be joined at the same time.
-A molten pool is formed under the arc which when is cooled form the weld joint.

23
Q

What is flux coating?

A

-Prevents oxygen and nitrogen from air contaminating the hot weld metal.
-Consits of various minerals and chemicals.

24
Q

What is meant by the term heat effected zones?

A

Zones below the parent metal which don’t contribute to the joint but have been exposed effected by the heat of the arc resulting in a fine grain structured material.

25
Q

What is the criteria to be considered when selecting the type of electrode?

A

-Base metal properties.
-Tensile Strength.
-Welding Current.
-Welding position/orientation.
-Environmental job conditions.