Ship Design and Construction Quiz
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Questions and Answers

What primarily influences the design of a ship?

  • The color scheme of the vessel
  • The shape of the crew accommodation
  • The brand of the engine used
  • The trade in which the ship will operate (correct)

Which factor is NOT typically influenced by the ship's trade?

  • Main hull dimensions
  • Port facilities
  • Crew size (correct)
  • General arrangement of cargo spaces

What is the purpose of a classification society in shipbuilding?

  • To manage the crew's performance
  • To ensure the ship has a specific color
  • To provide design guidelines for aesthetic purposes
  • To guarantee sound design and construction (correct)

Which aspect does NOT form part of the statutory requirements for ship design?

<p>Aesthetic appearance (A)</p> Signup and view all the answers

What has significantly advanced the construction and design process in recent years?

<p>Computer aided design and manufacturing techniques (B)</p> Signup and view all the answers

What balance must be achieved in ship design?

<p>Between economic, commercial, legal, and technical factors (C)</p> Signup and view all the answers

What aspect is emphasized in modern ship design to improve operational efficiency?

<p>Rapid port speed (A)</p> Signup and view all the answers

The overall objective of ship design is to provide a vessel that is:

<p>Seaworthy and operationally efficient (C)</p> Signup and view all the answers

What is the primary reason for shot blasting materials before welding in shipbuilding?

<p>To remove rust and mill scale (C)</p> Signup and view all the answers

Which component is considered a subassembly in shipbuilding?

<p>A group of steel pieces forming a two-dimensional part (C)</p> Signup and view all the answers

What is the maximum weight that a subassembly can typically weigh?

<p>5 tonnes (D)</p> Signup and view all the answers

What process occurs after the units are moved to the building berth but before they are fully erected?

<p>Pre-outfitting (C)</p> Signup and view all the answers

Why are the sizes of units limited to the 20 to 100 tonnes range?

<p>Transportation capacity of the yard's equipment (A)</p> Signup and view all the answers

Which of the following structures is classified as an assembly in shipbuilding?

<p>Three-dimensional structures weighing up to 20 tonnes (A)</p> Signup and view all the answers

What happens to excess material during the unit fabrication process?

<p>It is cut to size where necessary (A)</p> Signup and view all the answers

What two operations are typically performed on steel plates and sections after shot blasting?

<p>Priming and handling (B)</p> Signup and view all the answers

What is the primary advantage of combining abrasive cleaning with water-blasting?

<p>It produces a cleaner surface while suppressing dust. (B)</p> Signup and view all the answers

What environmental condition is ideal for successful paint application?

<p>Warm and dry weather. (C)</p> Signup and view all the answers

Which painting application method is identified as being the fastest and cleanest?

<p>Airless spray application. (C)</p> Signup and view all the answers

What should be done with scuppers or overflows before beginning paint application?

<p>They should be blocked or diverted. (D)</p> Signup and view all the answers

What type of paints should be used when poor environmental conditions are unavoidable?

<p>Formulated paints for adverse conditions. (B)</p> Signup and view all the answers

What is a significant hazard associated with paint materials?

<p>They can be poisonous and skin irritants. (B)</p> Signup and view all the answers

Which aspect is essential for safe operation during the preparation and painting process?

<p>Maintaining good safe and suitable means of access. (D)</p> Signup and view all the answers

Why is ventilation important when using paints?

<p>To protect against hazardous fumes and irritants. (C)</p> Signup and view all the answers

What is a primary reason for bulkhead failure at the deck or stool joints?

<p>Excessive loading on one side (D)</p> Signup and view all the answers

Which zones are particularly susceptible to cracking in a bulk carrier?

<p>Transition zones (B)</p> Signup and view all the answers

What can contribute to water leaks in upper and lower hopper tanks?

<p>Cracks at termination points (B)</p> Signup and view all the answers

Why must ballast tanks be inspected carefully?

<p>Their failure can influence structural integrity (D)</p> Signup and view all the answers

What opportunity does dry docking provide for a ship?

<p>To conduct thorough examinations of underwater areas (B)</p> Signup and view all the answers

What should be checked regarding sacrificial anodes during inspections?

<p>The degree of wastage and security of attachment (D)</p> Signup and view all the answers

What is the significance of checking the rudder during inspections?

<p>To examine for cracks and distortion (C)</p> Signup and view all the answers

What type of wear should be checked on hull attachments such as lugs and bilge keels?

<p>Corrosion and damage (D)</p> Signup and view all the answers

What is the purpose of camber in a ship's deck?

<p>To promote water drainage towards the sides of the ship (A)</p> Signup and view all the answers

How is the rise of the floor typically measured?

<p>From the base line to the bilge (D)</p> Signup and view all the answers

What does 'Breadth Extreme' refer to in ship measurements?

<p>The maximum width measured to the outside of shell plating (D)</p> Signup and view all the answers

What is the function of flare in a ship's bow?

<p>To prevent water from coming on board (A)</p> Signup and view all the answers

What are scantlings in the context of ship construction?

<p>The measurements of steel sections used in construction (B)</p> Signup and view all the answers

What component of a ship does 'light displacement' refer to?

<p>Weight with only gear and machinery installed (C)</p> Signup and view all the answers

What does an inward curvature of the midship side shell above the summer load line define?

<p>Tumblehome (C)</p> Signup and view all the answers

What best defines 'intercostals' in ship construction?

<p>Non-continuous parts fitted between others (C)</p> Signup and view all the answers

What is the primary purpose of the inner bottom in a ship?

<p>To maintain watertight integrity and allow for ballast. (B)</p> Signup and view all the answers

How is the depth of the double bottom in a ship determined?

<p>It is based on the classification society's requirements and functional capacities. (D)</p> Signup and view all the answers

Where is the depth of the double bottom typically increased?

<p>In the areas of machinery spaces and forward/aft for trimming. (D)</p> Signup and view all the answers

What structural feature divides the double bottom?

<p>The vertical centre girder. (A)</p> Signup and view all the answers

Which type of floors are provided at the ends of bottom tank spaces?

<p>Watertight or oil-tight plate floors. (A)</p> Signup and view all the answers

What is the function of bracket floors within the double bottom?

<p>They provide additional transverse strength. (C)</p> Signup and view all the answers

What type of internal support provides additional longitudinal strength within the double bottom?

<p>Fore and aft girder, known as the intercostal side girder. (A)</p> Signup and view all the answers

How do the longitudinal frames within the double bottom contribute to the structure?

<p>They enhance strength along the outer and inner bottom. (A)</p> Signup and view all the answers

Flashcards

Shot Blasting

A process that removes rust and mill scale from steel plates and sections using abrasive shot or grit.

Prefabrication Priming Paint

A preliminary coating applied to steel plates and sections after shot blasting to prevent corrosion and improve welding.

Subassembly

A collection of smaller steel parts joined together by welding, forming a two-dimensional part.

Assembly

Large, usually three-dimensional, structures of plating and sections that are assembled together, often weighing up to 20 tonnes.

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Ship Unit

Complex built-up sections of a ship, sometimes including complete sections like the fore end, often weighing over 100 tonnes.

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Pre-Outfitting

The process of fitting pipework and machinery into a unit before it's erected on the ship.

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Unit Erection

Fitting units together, cutting excess material, fairing (smoothing) surfaces, and welding them into place to form the hull of the ship.

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Unit Fabrication Limitations

The size of the units built is determined by the handling capacity of the shipyard, considering both weight and dimensions.

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Cargo type's influence on ship design

The type of goods a ship will carry significantly impacts the design of its cargo spaces and the equipment used to load and unload cargo.

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Legal requirements in ship design

Regulations like the International Convention for the Safety of Life at Sea (SOLAS) set minimum safety and seaworthiness standards for ships, affecting their design and construction.

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Classification Societies in ship design

Classification societies like Lloyd's Register of Shipping assess a ship's design and construction, providing owners and insurers with a guarantee of quality and safety.

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Trade's influence on ship dimensions

The trade a ship is intended for determines its overall size and shape, influencing its efficiency and ability to navigate in different waterways.

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Technology's impact on ship design

Computer-aided design (CAD) and manufacturing (CAM) tools revolutionized ship construction, allowing for more efficient designs and production methods in shipyards.

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Hull design's impact on efficiency

The ship's hull design is crucial for determining its resistance to water and the power required to move it, impacting its overall efficiency.

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Ship design as a compromise

Successful ship designs strike a balance between economic profitability, operational requirements, legal regulations, and technological advancements.

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Port speed in ship design

Modern ship design emphasizes fast turnaround times in ports, which requires efficient cargo handling and loading techniques and the ability to navigate quickly.

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Camber

The transverse curvature of the deck from the center line down to the sides. This camber is used to drive water to the sides of the ship.

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Tumblehome

An inward curvature of the midship side shell above the summer load line (in the region of the upper deck).

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Rise of the Floor

The angle between the base line of the top edge of the keel and the bottom shell plating. The bottom shell of a ship is sometimes sloped up from the keel to the bilge to facilitate drainage.

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Base Line

A horizontal line drawn at the top of the keel plate from midships. All vertical molded dimensions are measured relative to this line (usually the lowest external edge of the keel).

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Breadth Extreme

The greatest breadth of the ship, measured to the outside of the shell plating.

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Breadth Moulded

The greatest breadth of the ship measured to the inside of the inside strakes of shell plating.

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Depth Extreme

The depth of the ship measured from the underside of the keel to the top of the deck beam at the side of the uppermost continuous deck amidships.

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Depth Moulded

The depth measured from the top of the keel.

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Abrasive and Water Blasting

A combined method of cleaning metal surfaces using both abrasive particles and water, providing faster cleaning and dust suppression.

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Corrosion Inhibitors

Chemicals added to water during abrasive and water blasting to prevent corrosion after cleaning.

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Ideal Painting Conditions

The ideal weather conditions for applying paint: warm and dry.

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Special Paints

Special paints formulated for curing in less-than-ideal conditions like humidity or cold temperatures.

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Improving Painting Conditions

Using shelters or warm air to improve paint curing and adhesion in unfavorable weather.

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Airless Spray

The fastest and cleanest method of paint application, using high pressure to spray paint onto the surface.

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Safe Access During Work

The importance of safe and suitable access to ensure proper work conditions during ship preparation and painting.

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Transition Zones in Bulk Carriers

The areas where different structural sections of a ship connect, like the bulkhead to the deck, are particularly weak and prone to cracking due to stress.

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Hopper Tank End Points

The end points of hopper tanks where they meet the transverse bulkheads are vulnerable to cracking. Water leaks can worsen the problem, leading to corrosion and potential failure.

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Side Shell Plating Inspection

The side shell plating of a bulk carrier must be thoroughly examined for corrosion, damage, distortion, and cracks, which can lead to structural failure.

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Bulkhead-Side Shell Connection

The connection between the bulkhead plating and the side shell must be carefully inspected for any signs of corrosion, damage, or weakening.

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Importance of Dry Docking

Every dry docking offers a chance to examine the underwater areas of a ship thoroughly for corrosion, damage, and other issues.

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Shell Plating Inspection

The shell plating must be inspected for corrosion, damage, distortion, and cracks, especially near openings and discontinuities.

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Rudder Inspection

The rudder of a ship should be inspected for cracks, distortion, and water ingress through the drain plugs to ensure its proper functioning.

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Sacrificial Anodes Inspection

Sacrificial anodes, part of cathodic protection systems, should be checked for security of attachment and the extent of their wear and tear.

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What is a double bottom?

A double bottom consists of two layers of plating with a void space between them, creating a watertight compartment.

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What is the safety benefit of a double bottom?

The double bottom adds to the ship's safety by providing a space that can be flooded in case of damage to the bottom shell, preventing the entire ship from sinking.

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What is the space between the double bottom used for?

The space between the double bottom is not wasted and is used to store essential resources like fuel, fresh water, and ballast.

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What determines the depth of the double bottom?

The depth of the double bottom is determined based on the classification society's requirements, type of cargo, and the capacity needed for fuel, water, and ballast.

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Why is the double bottom tapered?

The inner bottom is gradually tapered to avoid abrupt changes in the ship's structure, which could cause stress points.

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Describe the structure of the double bottom.

The double bottom is divided by the center girder and extends out to the ship's side, where it meets the margin plate.

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How is the strength of the double bottom increased?

The double bottom is further strengthened by transverse floors and longitudinal girders that help to distribute weight and resist bending forces.

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Why is a double bottom important?

The double bottom provides important structural support and stability for the ship, making it a crucial element in its construction.

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Study Notes

Ship Construction Notes

  • This module covers ship construction and stability, specifically for nautical science year 3 officers of the watch.
  • Key ship types are mentioned, including Ro-Ro, crude carriers, kamsarmax, LNG carriers, handysize, reefer, livestock, LPG carriers, heavy-lift, chemical, and coasters.
  • The module's contents cover various aspects of ship design, construction, and maintenance, including module introduction, exam questions, assignment guidelines, the ship design and building process, definitions and terminology, ship stresses, welding, corrosion, protective coatings, classification, maintenance and survey, ship framing systems, double bottoms, pipes and pumping, bilge systems, ship structures, fore and aft end structure, steering gear, load line rules, hull openings, and sample questions.
  • The final exam is split between stability and construction (60/40 split) with a 40% pass mark for ordinary degrees and 50% for eligibility for the oral examination.
  • Learning outcomes include calculations related to IMO Intact Stability for loaded cargo ships, design and construction requirements for specialized ship types, structural arrangements for merchant vessels, watertight integrity and subdivision, and ship building and maintenance processes.
  • Exam question breakdowns are presented for specialized ship types, merchant vessel structural arrangements, drawings of specific components (duct keel, double bottom structures, etc), and high-stress areas with examples involving bulk carriers, container ships, and tankers.

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OOW Ship Construction Notes Sept 2024 PDF

Description

Test your knowledge on the fundamental aspects of ship design and construction. This quiz covers various influences on ship design, the role of classification societies, and the specifics of shipbuilding processes and regulations. Perfect for students and professionals in maritime studies!

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