Ship CON Quiz-b

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| By Sir_tenyosa
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Sir_tenyosa
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Ship CON Quiz-b - Quiz

INSTRUCTION: THE TEST SHOULD BE TAKEN FOR THE PRESCRIBE TIME.


Questions and Answers
  • 1. 

     What welding process uses CO2 to cool down the welded part between 2 parent metal?         

    • A.

      . Tungsten inert gas welding

    • B.

      . Metal Inert gas welding

    • C.

      . Electro gas welding

    • D.

      Electro slag welding

    Correct Answer
    C. . Electro gas welding
    Explanation
    Electro gas welding is a welding process that uses CO2 to cool down the welded part between two parent metals.

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  • 2. 

    When the vessel is in a sagging condition, where does the tensile stress be felt?

    • A.

      . In the bottom

    • B.

      On the deck

    • C.

      It is found in the hull section

    • D.

      . On the forepart where the weight is less

    • E.

      . It is found in the hull section

    Correct Answer
    A. . In the bottom
    Explanation
    When a vessel is in a sagging condition, the weight of the ship causes the middle portion of the hull to sag downwards. This results in a tensile stress being felt in the bottom of the vessel. The bottom of the hull is subjected to stretching forces due to the sagging, leading to tensile stress. Therefore, the correct answer is "In the bottom."

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  • 3. 

    What is true about in-water survey of vessels?

    • A.

      Conducted prior to docking survey

    • B.

      . Become due every 4 years

    • C.

      . Conducted twice in any docking survey

    • D.

      . Done at the end of the docking survey

    Correct Answer
    A. Conducted prior to docking survey
    Explanation
    In-water survey of vessels is conducted before the docking survey takes place. This means that it is done before the vessel is taken out of the water for inspection and maintenance. The purpose of the in-water survey is to assess the condition of the vessel's hull and underwater components, such as propellers and rudders. It is typically done every four years to ensure that the vessel remains in compliance with safety and regulatory standards.

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  • 4. 

    What kind of major disturbance on the ship’s body causes cracks on the stern frame?

    • A.

      Shearing forces

    • B.

      Internal forces

    • C.

      . Dynamic Force

    • D.

      . Bending moments

    Correct Answer
    D. . Bending moments
    Explanation
    Bending moments can cause cracks on the stern frame of a ship. Bending moments occur when there is a force applied to the ship's body that causes it to bend or flex. This force can put stress on the stern frame, leading to cracks.

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  • 5. 

    What type of weld does an intermittent weld belongs to?

    • A.

      Normal fillet weld

    • B.

      . full penetration fillet weld

    • C.

      . tack weld

    • D.

      Lap weld

    Correct Answer
    A. Normal fillet weld
    Explanation
    An intermittent weld belongs to the category of a normal fillet weld. This type of weld is characterized by intermittent weld beads or spots along the joint, rather than a continuous weld. It is commonly used when full penetration is not required or when the joint does not require the strength of a continuous weld.

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  • 6. 

    What causes the absence of reinforcement or root penetration in welding?

    • A.

      High welding current

    • B.

      . low welding current

    • C.

      . incompetent welder

    • D.

      . low welding current

    Correct Answer
    C. . incompetent welder
    Explanation
    The absence of reinforcement or root penetration in welding can be caused by an incompetent welder. A skilled and experienced welder knows how to properly control the welding process, including the selection of appropriate welding parameters such as current, voltage, and speed. If the welder lacks the necessary skills or knowledge, they may not be able to achieve the desired level of reinforcement or root penetration, leading to a poor quality weld.

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  • 7. 

    What is the high advantage of high tensile steel over mild steel in ship building?

    • A.

      . It has high carbon contain steel

    • B.

      . Good weld ability characteristics

    • C.

      It saves 60% of the weight

    • D.

      . Recommended by American Bureau of Shipping

    Correct Answer
    B. . Good weld ability characteristics
    Explanation
    High tensile steel has good weldability characteristics, which means it can be easily joined together using welding techniques. This is an advantage in shipbuilding as it allows for efficient construction and repair processes. Weldability is important in shipbuilding as it ensures the structural integrity of the ship, as well as the ability to withstand the harsh conditions of the sea. Therefore, the good weldability characteristics of high tensile steel make it a preferred choice in shipbuilding over mild steel.

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  • 8. 

    Shear forces tend to affect the material on a vessel’s structure, what causes this stress?

    • A.

      When there is longitudinal distortion

    • B.

      When simultaneous loading starts

    • C.

      When there is a constant varying loads

    • D.

      . when hogging is experienced

    Correct Answer
    C. When there is a constant varying loads
    Explanation
    When there is a constant varying load on a vessel's structure, shear forces are generated. These shear forces occur when the load applied to the structure changes continuously over time. This constant variation in the load causes stress on the material, leading to shear forces.

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  • 9. 

    What is the best butt weld preparation for steel thickness up to 20 mm?

    • A.

      . U-weld

    • B.

      . Double V preparation

    • C.

      . Square-edge

    • D.

      . V-weld

    Correct Answer
    D. . V-weld
    Explanation
    The best butt weld preparation for steel thickness up to 20 mm is a V-weld. This type of preparation involves creating a V-shaped groove in the two pieces of steel that are being joined together. The V-shaped groove allows for better penetration of the weld and ensures a stronger and more reliable bond between the two pieces of steel. This type of preparation is commonly used for thinner steel thicknesses as it provides a good balance between strength and ease of welding.

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  • 10. 

    The vessel’s structure is distorted due to panting, what ship’s motion is a contributor to it?

    • A.

      . Pitching

    • B.

      . Rolling

    • C.

      . Heaving

    • D.

      Swaying

    Correct Answer
    A. . Pitching
    Explanation
    Pitching is the ship's motion that causes the vessel to move up and down along its longitudinal axis. This motion can lead to the distortion of the vessel's structure due to panting, which refers to the flexing or bending of the ship's hull. Rolling refers to the side-to-side motion, heaving refers to the vertical motion, and swaying refers to the oscillating motion of the vessel. However, in this case, pitching is the specific ship's motion that is identified as a contributor to the distortion of the vessel's structure.

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  • 11. 

    It is a weld test procedure where a photographic plate is exposed to x-ray radiation?

    • A.

      Ultrasonic inspection

    • B.

      Dye penetrants

    • C.

      Radiographic inspection

    • D.

      Visual examination

    Correct Answer
    C. Radiographic inspection
    Explanation
    Radiographic inspection is the correct answer because it involves exposing a photographic plate to x-ray radiation. This method is commonly used to inspect welds and detect any internal flaws or defects. Ultrasonic inspection uses sound waves to detect defects, dye penetrants involve applying a liquid dye to detect surface cracks, and visual examination involves visually inspecting the weld for any visible defects.

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  • 12. 

    It is an immediate cause of stress due to excessive rolling and pitching of the vessel.

    • A.

      . Racking

    • B.

      . Pounding

    • C.

      . Sloshing

    • D.

      Panting

    Correct Answer
    C. . Sloshing
    Explanation
    Sloshing refers to the movement of liquid inside a vessel, which can cause excessive rolling and pitching of the vessel. This movement creates instability and can lead to stress and discomfort for those on board. Therefore, sloshing is an immediate cause of stress due to its disruptive effects on the vessel's motion.

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  • 13. 

    How will you know that ship building materials can withstand stress?

    • A.

      . By the effect of stress and strain as to fatigue

    • B.

      . By determining its total strain

    • C.

      By dividing the area of the material by its load

    • D.

      . By determining its load per unit area

    Correct Answer
    D. . By determining its load per unit area
    Explanation
    To determine if ship building materials can withstand stress, one needs to assess the load per unit area. This means calculating the amount of force or load the material can bear in relation to its surface area. By determining this load per unit area, one can determine if the material is strong enough to withstand the stress it will encounter during shipbuilding.

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  • 14. 

    What is all about young’s modulus?

    • A.

      Stress is directly proportional to strain

    • B.

      . Stress is indirectly proportional to strain

    • C.

      . Strain is indirectly proportional to stress

    • D.

      Stress directly proportional to the sectional area of the material

    Correct Answer
    A. Stress is directly proportional to strain
    Explanation
    Young's modulus is a measure of the stiffness of a material. It describes the relationship between stress and strain in a material under tension or compression. The correct answer, "Stress is directly proportional to strain," means that as the stress applied to a material increases, the resulting strain (deformation) also increases in direct proportion. This indicates that the material is exhibiting a linear elastic behavior, where it can return to its original shape once the stress is removed.

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  • 15. 

    It is a type of welding consisting of 2 electrodes.

    • A.

      . Thermit welding

    • B.

      . Resistance welding

    • C.

      . Electric Arc welding

    • D.

      Gas welding

    Correct Answer
    C. . Electric Arc welding
    Explanation
    Electric Arc welding is a type of welding that uses two electrodes to create an electric arc between them. The heat generated by the electric arc melts the workpieces, allowing them to be fused together. This type of welding is commonly used in construction, fabrication, and repair work. It is known for its versatility and ability to weld a wide range of materials, including steel, aluminum, and stainless steel. Electric Arc welding is often preferred for its high welding speed and strong weld joints.

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  • 16. 

    What is the best description of a tack weld?.

    • A.

      . A butt weld for

    • B.

      . A temporary weld

    • C.

      . A lap weld

    • D.

      . A flush weld

    Correct Answer
    C. . A lap weld
    Explanation
    A lap weld is the best description of a tack weld. A lap weld is a type of weld where two pieces of metal are overlapped and joined together at the edges. A tack weld, on the other hand, is a temporary weld used to hold two pieces of metal in place before a permanent weld is made. Therefore, a lap weld accurately describes a tack weld as it involves overlapping and joining two pieces of metal together.

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  • 17. 

    What makes the forward bottom area of the vessel as one to consider a critical region?

    • A.

      The area experiences too much panting in heavy weather

    • B.

      . It is because of the structure of the framing system

    • C.

      It is affected by too much rolling and pitching

    • D.

      It is where buoyancy is usually present

    Correct Answer
    A. The area experiences too much panting in heavy weather
    Explanation
    The forward bottom area of the vessel is considered a critical region because it experiences excessive panting in heavy weather. Panting refers to the movement and deformation of the ship's hull due to the dynamic forces exerted on it during rough sea conditions. This constant flexing can lead to structural fatigue and potential failure of the framing system in that area. Therefore, it is crucial to monitor and reinforce this region to ensure the integrity and safety of the vessel.

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  • 18. 

    What is the term given to the effect of stress where at any point results to the algebraic sum of moments of all loads acting between that point and one end of the vessel?

    • A.

      Tensile stress

    • B.

      . Bending moment

    • C.

      Shear forces

    • D.

      . Compressive

    Correct Answer
    B. . Bending moment
    Explanation
    The term given to the effect of stress where at any point results in the algebraic sum of moments of all loads acting between that point and one end of the vessel is called the bending moment. This refers to the tendency of a material to bend or deform under the influence of an applied load. Bending moments are important in structural engineering as they determine the strength and stability of a structure.

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  • 19. 

    What is the best description of vertical shear forces?

    • A.

      Total stress minus load

    • B.

      The opposite of stress

    • C.

      . The total deformation which the body experiences when subject to load

    • D.

      The upward and downward distortion forces

    Correct Answer
    D. The upward and downward distortion forces
    Explanation
    Vertical shear forces refer to the forces that cause a body or structure to deform or distort in an upward and downward direction. These forces act perpendicular to the surface of the object and can result in bending, twisting, or shearing of the material. They are responsible for the internal stresses and deformations that occur within a structure when it is subjected to external loads.

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  • 20. 

    The following are reasons why high tensile steel has more advantages than mild steel, except one.

    • A.

      . Lighter than mild steel

    • B.

      . saves weight

    • C.

      Use on areas of high stress

    • D.

      . Saves cost

    Correct Answer
    D. . Saves cost
    Explanation
    High tensile steel has more advantages than mild steel because it is lighter, saves weight, can be used on areas of high stress, and saves cost. However, the given answer states that "saves cost" is not an advantage of high tensile steel. This means that high tensile steel does not save cost compared to mild steel, which is contradictory to the other advantages mentioned.

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  • 21. 

                Which of the following is true about steel forging?

    • A.

      It allows a molten steel to solidify in a mould of a desired shape

    • B.

      . Method of shaping a metal by hammering

    • C.

      . It becomes more or less plastic

    • D.

      Metal becomes brittle

    Correct Answer
    B. . Method of shaping a metal by hammering
    Explanation
    Steel forging is a method of shaping a metal by hammering. This process involves heating the steel to a high temperature and then using a hammer or press to shape it into the desired form. The force applied during forging causes the steel to become more plastic, allowing it to be easily shaped. This method is commonly used in the manufacturing of various steel products, such as automotive parts, tools, and machinery components.

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  • 22. 

    When a vessel is experiencing compressive stress on the deck, what is its possible effect to the vessel?

    • A.

      . hogging

    • B.

      Sagging

    • C.

      . pounding

    • D.

      . dynamic force

    Correct Answer
    B. Sagging
    Explanation
    When a vessel is experiencing compressive stress on the deck, the possible effect is sagging. Compressive stress refers to the force that pushes or squeezes an object, causing it to deform or buckle. In the case of a vessel, this stress can cause the deck to bend or sag downwards. This can be a result of heavy loads or external forces acting on the vessel. Sagging can affect the structural integrity of the vessel and may lead to further damage if not addressed.

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  • 23. 

    What motions of the vessel is the possible cause of racking?

    • A.

      Heaving

    • B.

      . Pitching and heaving

    • C.

      Rolling

    • D.

      Surging and swaying

    Correct Answer
    C. Rolling
    Explanation
    Rolling is the motion of a vessel where it sways from side to side, causing it to lean alternately to port and starboard. This motion can be caused by various factors such as wind, waves, or the vessel's own propulsion. When a vessel rolls, it puts stress on its structure, which can lead to a phenomenon called racking. Racking refers to the twisting or distortion of a vessel's structure due to the uneven distribution of forces during rolling. Therefore, rolling is the possible cause of racking in a vessel.

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  • 24. 

           How does the crest/s of the wave tend to sag the vessel?

    • A.

      Its midship part is supported by buoyancy.

    • B.

      The buoyancy is more in the midship part.

    • C.

      . It creates weight equal to its buoyancy

    • D.

      . The buoyancy created is greater on the fore and aft part

    Correct Answer
    D. . The buoyancy created is greater on the fore and aft part
    Explanation
    The crest/s of the wave tend to sag the vessel because the buoyancy created is greater on the fore and aft part. This means that the midship part, which is supported by buoyancy, experiences less buoyancy compared to the fore and aft parts. As a result, the midship part is pulled down by the greater buoyancy at the ends, causing the vessel to sag.

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  • 25. 

    Docking surveys are conducted to vessels, at what scheduled interval does in-water survey should be done?

    • A.

      . Twice every special survey

    • B.

      . Every year

    • C.

      Once every dry dockings

    • D.

      On any of the two dockings in a five-year period

    Correct Answer
    D. On any of the two dockings in a five-year period
    Explanation
    In-water surveys should be done on any of the two dockings in a five-year period. This means that during a five-year period, the vessel should undergo two dockings, and the in-water survey can be conducted during either of these two dockings. This interval allows for regular inspections and maintenance of the vessel's hull and underwater components to ensure its seaworthiness and compliance with safety standards.

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  • 26. 

    Why shearing forces tend to distort the vessel’s structure?

    • A.

      They tend to break the material in the hull vertically

    • B.

      . The longitudinal shear is more evident due to dynamic forces

    • C.

      . There is an unequal effect of cargo on the sides

    • D.

      There is a horizontal cutting of material due to static forces

    Correct Answer
    A. They tend to break the material in the hull vertically
    Explanation
    Shearing forces exert a force parallel to the surface of the vessel, causing one part of the material to slide past another. This sliding motion creates a vertical stress that can lead to the breaking of the material in the hull vertically. The dynamic nature of these forces makes the longitudinal shear more evident, as the vessel is subjected to varying loads and motions. Additionally, the uneven distribution of cargo on the sides of the vessel can create an unequal effect, further contributing to the distortion of the vessel's structure.

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  • 27. 

    What is the length of the vessel requiring that ballast tanks should be examined on the 2nd survey after each special survey?

    • A.

      . 102 meters or more

    • B.

      . 210 ft or more

    • C.

      Maximum of 120 meters

    • D.

      120 meters or more

    Correct Answer
    D. 120 meters or more
    Explanation
    The correct answer is 120 meters or more. This means that any vessel with a length of 120 meters or more requires that its ballast tanks be examined on the 2nd survey after each special survey.

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  • 28. 

    When do materialis said to experience its brittle fracture?

    • A.

      . The elastic limit is reached

    • B.

      . Its yield point is reached

    • C.

      Its plasticity ends

    • D.

      It is drawn lengthwise

    Correct Answer
    C. Its plasticity ends
    Explanation
    When a material reaches its brittle fracture, it means that it can no longer deform or change shape plastically. Plasticity refers to the ability of a material to undergo permanent deformation without breaking. Therefore, when a material's plasticity ends, it becomes more prone to brittle fracture, meaning it will break or fracture without significant deformation or warning.

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  • 29. 

    What forces is created by the ship’s motion and action of the waves at sea?

    • A.

      . Dynamic forces

    • B.

      Buoyant forces

    • C.

      . Internal forces

    • D.

      Static Forces

    Correct Answer
    A. . Dynamic forces
  • 30. 

           How do you find the stress of the material?

    • A.

      Area of a material and its max. load

    • B.

      Total load and the total area of a certain length of a material

    • C.

      Stress is equal to strain

    • D.

      Load of a material over its cross-sectional area

    Correct Answer
    D. Load of a material over its cross-sectional area
    Explanation
    The stress of a material is determined by dividing the load applied to the material by its cross-sectional area. This is because stress is a measure of the force per unit area that a material is subjected to. By dividing the load by the cross-sectional area, we can calculate the amount of force exerted on each unit of area, giving us the stress value.

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  • 31. 

    At what phase does stress is not proportional to strain?

    • A.

      . Malleability

    • B.

      . Toughness

    • C.

      . Plasticity

    • D.

      . Elasticity

    Correct Answer
    C. . Plasticity
    Explanation
    Plasticity refers to the ability of a material to undergo permanent deformation without breaking or fracturing. In this phase, stress is not proportional to strain, meaning that the material does not exhibit linear behavior. Instead, it undergoes significant deformation under stress, resulting in a non-linear relationship between stress and strain.

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  • 32. 

    The motion of the vessel against the waves tends to create an in out movement of the shell plating. What is the term given to that distortion?

    • A.

      Racking

    • B.

      . Panting

    • C.

      . Slamming

    • D.

      . Pounding

    Correct Answer
    B. . Panting
    Explanation
    Panting is the term given to the distortion caused by the in-out movement of the shell plating due to the vessel's motion against the waves. This movement creates a flexing or bending action in the plating, resembling the panting of a person or animal. Racking refers to the distortion caused by the vessel's twisting motion, slamming refers to the impact of waves against the vessel's hull, and pounding refers to the repeated heavy impacts of waves.

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  • 33. 

    How do you measure the ductility of the metal?

    • A.

      The total length is equal to its toughness

    • B.

      . It measures longer than the original length after it has been stretch.

    • C.

      When the metal is flattened

    • D.

      The time duration when exposed to pulling strength

    Correct Answer
    B. . It measures longer than the original length after it has been stretch.
    Explanation
    Ductility is a measure of a metal's ability to deform under tensile stress without breaking. It is typically measured by determining how much longer the metal becomes after it has been stretched. If the metal measures longer than its original length after being stretched, it indicates that it is ductile. Therefore, the statement "It measures longer than the original length after it has been stretched" correctly explains how to measure the ductility of a metal.

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  • 34. 

    A material tends to experience strain because of heavy weight, in this condition what property of metal is being experienced?

    • A.

      . It behaves plasticity

    • B.

      . It will experience brittle fracture

    • C.

      . It start to developed stress

    • D.

      It experienced elasticity

    Correct Answer
    D. It experienced elasticity
    Explanation
    When a material experiences strain because of heavy weight, it tends to return to its original shape once the weight is removed. This property is known as elasticity. Elastic materials can deform under stress, but they can also regain their original shape once the stress is removed. In this case, the metal is experiencing strain due to the heavy weight, but it is able to return to its original shape, indicating that it is exhibiting elasticity.

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  • 35. 

    This is the effect of two forces acting in opposite direction and along parallel lines?

    • A.

      . Tensile stress

    • B.

      Static forces

    • C.

      Compressive stress

    • D.

      Shear

    Correct Answer
    D. Shear
    Explanation
    Shear refers to the effect of two forces acting in opposite directions and along parallel lines. In shear, the forces cause one layer of a material to slide or deform relative to another layer. This type of stress occurs when forces are applied parallel to the surface of an object, causing the object to shear or twist. Shear stress is commonly observed in structures such as beams and bridges, and it can lead to deformation or failure if the material is unable to withstand the applied forces.

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  • 36. 

    What structural connection does double continuous fillet weld serves the best?

    • A.

      Watertight and oil tight structural connection

    • B.

      . Framing system

    • C.

      . Ballast tanks

    • D.

      . Deck beams

    Correct Answer
    A. Watertight and oil tight structural connection
    Explanation
    The double continuous fillet weld serves the best for a watertight and oil tight structural connection. This type of weld creates a strong and continuous bond between two surfaces, preventing any leakage or seepage of water or oil. It is commonly used in applications such as ballast tanks and deck beams, where a secure and tight connection is necessary to maintain the integrity of the structure and prevent any potential damage or contamination.

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  • 37. 

    Which of the following property of metal is being tested before they are being use for the suitability of their functions?

    • A.

      . Plasticity, Malleability, Fatigue

    • B.

      Plasticity, elasticity, toughness

    • C.

      . Ductility, Fatigue, Strength

    • D.

      . Ductility, Strength, Toughness

    Correct Answer
    D. . Ductility, Strength, Toughness
    Explanation
    The properties being tested before metals are used for their functions are ductility, strength, and toughness. Ductility refers to the ability of a metal to be stretched into a wire without breaking. Strength is the ability of a metal to withstand external forces without deformation or breaking. Toughness is the ability of a metal to absorb energy without fracturing. These properties are important to ensure that the metal can perform its intended function without failure or damage.

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  • 38. 

    You are task to fuse 2 metals with thickness of 10 mm, what welding process are you going to use?

    • A.

      . Electroslag welding

    • B.

      Metal inert gas

    • C.

      Electrogas

    • D.

      . Tunsten Inert gas

    Correct Answer
    D. . Tunsten Inert gas
    Explanation
    Tungsten Inert Gas (TIG) welding is the most suitable process for fusing metals with a thickness of 10 mm. TIG welding uses a non-consumable tungsten electrode to produce a high-intensity arc that melts the metals, while an inert gas, such as argon, is used to shield the weld area from atmospheric contamination. TIG welding provides precise control over the heat input, ensuring a strong and reliable weld joint. Electroslag welding is typically used for thicker materials, while Metal Inert Gas (MIG) and Electrogas welding are better suited for thicker and heavier sections.

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  • 39. 

    What 2 factors affect or will result to varying buoyant force on the vessel while she is underway.

    • A.

      . Stress and strain

    • B.

      . The frequency and height of the waves

    • C.

      . Internal and external forces

    • D.

      . Crest and trough of the waves

    Correct Answer
    B. . The frequency and height of the waves
    Explanation
    The frequency and height of the waves affect the buoyant force on a vessel while it is underway. Higher frequency and taller waves will result in a greater buoyant force on the vessel. This is because as the waves become larger and more frequent, they exert more pressure on the hull of the vessel, causing it to experience a greater buoyant force. This can impact the stability and maneuverability of the vessel, making it important for sailors to be aware of the sea conditions when navigating.

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  • 40. 

    When is a material said to reach its yield point?

    • A.

      . The metal resists wear and tear

    • B.

      The state of a material tends to remain the same after it is stretch

    • C.

      . When plasticity ends

    • D.

      The material has reach its elasticity

    Correct Answer
    D. The material has reach its elasticity
    Explanation
    A material is said to reach its yield point when it has reached its elasticity limit. This means that the material can no longer return to its original shape after being stretched or deformed. At this point, the material starts to exhibit plastic behavior and will undergo permanent deformation. Therefore, the statement "The material has reached its elasticity" accurately describes the concept of the yield point.

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  • 41. 

    . What do you call an organization created for the initial inception of ships?

    • A.

      International Maritime Organization

    • B.

      . Lloyd Surveying Center

    • C.

      . Classification Society

    • D.

      International ships Register

    Correct Answer
    C. . Classification Society
    Explanation
    A Classification Society is an organization created for the initial inception of ships. They are responsible for setting and enforcing standards for the construction and maintenance of ships. They provide classification and certification services to ensure that ships are built and operated safely and efficiently. This includes conducting inspections, surveys, and audits to ensure compliance with international regulations and standards. Classification Societies play a crucial role in ensuring the safety and reliability of ships worldwide.

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  • 42. 

    What is of prime important in designing a ship?

    • A.

      . size of the ship

    • B.

      . economic factor

    • C.

      Availability of men

    • D.

      Time of building

    Correct Answer
    B. . economic factor
    Explanation
    The economic factor is of prime importance in designing a ship because it determines the cost-effectiveness and profitability of the ship. Designing a ship that is economically efficient in terms of fuel consumption, maintenance costs, and operational expenses is crucial for the success of the ship. The economic factor also considers factors such as the ship's cargo capacity, speed, and overall performance, which directly impact the profitability of the ship's operations. Therefore, considering the economic factor ensures that the ship is designed to be cost-effective and financially viable.

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  • 43. 

    . At what stage of ship building design in which service performance is optimized?

    • A.

      . concept design

    • B.

      . contract design

    • C.

      . post contract design

    • D.

      Preliminary design

    Correct Answer
    D. Preliminary design
    Explanation
    The preliminary design stage of ship building design is where service performance is optimized. This stage involves creating initial design concepts and evaluating their feasibility, performance, and cost-effectiveness. It is during this stage that various design options are explored and analyzed to ensure that the ship's performance meets the desired requirements. By optimizing the ship's design at this early stage, potential issues and inefficiencies can be identified and addressed before moving on to the more detailed stages of design and construction.

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  • 44. 

    What information is needed in the preliminary design stage?

    • A.

      . stability

    • B.

      Survey certificate

    • C.

      . trial condition

    • D.

      . patents

    Correct Answer
    A. . stability
    Explanation
    In the preliminary design stage, stability information is required. This includes analyzing the stability of the design to ensure that it will not tip over or become unstable during use. This information is crucial in determining the feasibility and safety of the design.

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  • 45. 

    . In ship building the main material used is:

    • A.

      Minerals

    • B.

      . iron

    • C.

      Steel

    • D.

      D aluminum

    Correct Answer
    C. Steel
    Explanation
    In shipbuilding, the main material used is steel. Steel is preferred due to its durability, strength, and ability to withstand harsh marine environments. It offers excellent resistance to corrosion and can handle the heavy loads and stresses experienced by ships. Steel also provides flexibility in design and allows for the construction of large and complex structures required for ships. Additionally, steel is readily available and cost-effective compared to other materials, making it the ideal choice for shipbuilding.

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  • 46. 

    A type of ship stress in which the forces are acting in a direction as to decrease length?

    • A.

      . tensile

    • B.

      Shear force

    • C.

      . compressive force

    • D.

      . ductility

    Correct Answer
    C. . compressive force
    Explanation
    Compressive force refers to a type of ship stress in which the forces are acting in a direction that decreases the length of the ship. When a ship is subjected to compressive forces, it experiences a pushing or squeezing effect that causes it to shorten in length. This type of stress can occur when the ship is subjected to external pressure or when it is loaded with heavy cargo. Compressive forces are important to consider in ship design and construction to ensure the structural integrity and safety of the vessel.

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  • 47. 

    . A type of welding in which flux covered coated electrode fed the joint.

    • A.

      . electro gas welding

    • B.

      . tungsten inert gas

    • C.

      Automatic welding

    • D.

      . metal inert gas

    Correct Answer
    C. Automatic welding
    Explanation
    Automatic welding is a type of welding where a flux-covered coated electrode is fed into the joint. This process is automated and does not require manual control, making it efficient and suitable for high-volume production. Electro gas welding, tungsten inert gas (TIG), and metal inert gas (MIG) are different types of welding processes that do not involve the use of a flux-covered coated electrode.

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  • 48. 

    . A welding position in which various parts were place in the most convenient place?.

    • A.

      . downhand

    • B.

      . overhand

    • C.

      . vertical

    • D.

      . horizontal

    Correct Answer
    A. . downhand
    Explanation
    The term "downhand" refers to a welding position where the welding is performed in a downward direction. In this position, the various parts that need to be welded are placed in the most convenient place for the welder to work on. This position is commonly used when the parts being welded are located in a horizontal or flat position. It allows for easy access and visibility, making it convenient for the welder to perform the welding task efficiently.

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  • 49. 

    When a load is place or put on a piece of material in shipbuilding, it is called:

    • A.

      Strain

    • B.

      Bending moment

    • C.

      . loading

    • D.

      . stress

    Correct Answer
    D. . stress
    Explanation
    When a load is placed on a piece of material in shipbuilding, it creates stress within the material. Stress refers to the internal forces that develop when an external load is applied to a material. In this context, the load on the material causes it to experience stress, which can result in deformation or failure if the material exceeds its strength limit. Therefore, stress is the appropriate term to describe the situation when a load is placed on a piece of material in shipbuilding.

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  • 50. 

    . A type of weld whereby it is applied to a right angled joint and lapped joints?

    • A.

      . Butt weld

    • B.

      Fillet weld

    • C.

      U-weld

    • D.

      Tack weld

    Correct Answer
    B. Fillet weld
    Explanation
    A fillet weld is a type of weld that is applied to a right angled joint and lapped joints. In this type of weld, the weld metal is deposited in a triangular shape along the joint, forming a fillet. It is commonly used to join two pieces of metal at a 90-degree angle or to join overlapping pieces of metal. The fillet weld provides strength and stability to the joint, making it suitable for various applications in industries such as construction, manufacturing, and fabrication.

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