Buoyancy Principles Quiz
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Questions and Answers

What should be true about the center of buoyancy and the center of gravity of an object?

  • They must be on the same horizontal line
  • They must be at a 45-degree angle
  • They must be at opposite ends of the object
  • They must be on the same vertical line (correct)

    • What forms a righting couple in the context of floating objects?

  • The center of buoyancy and the center of pressure
  • The center of buoyancy and the metacenter
  • The center of gravity and the metacenter
  • The center of gravity and the center of buoyancy (correct)

    • What is the Metacentric height defined as?

  • Distance between center of gravity and metacenter
  • Distance between center of buoyancy and metacenter (correct)
  • Distance between center of pressure and metacenter
  • Distance between center of gravity and center of buoyancy

    • Where is the Metacenter located in relation to a floating body?

    <p>Midpoint between external buoyant force and center line of body</p> Signup and view all the answers

    When a floating body is slightly displaced in a liquid, about which point does it oscillate?

    <p>Metacenter</p> Signup and view all the answers

    How is the Metacenter defined when a body floating in a liquid is slightly displaced?

    <p>Intersection point of vertical upward force through CG and center line</p> Signup and view all the answers

    What is the correct definition of buoyant force?

    <p>Displacement of fluid due to the submerged body</p> Signup and view all the answers

    Which principle states that the resultant upward pressure of a fluid on a floating body equals the weight of the fluid displaced?

    <p>Bernoulli’s theorem</p> Signup and view all the answers

    In buoyancy, what is the principal cause of action for a body submerged in fluid?

    <p>Displacement of fluid due to the submerged body</p> Signup and view all the answers

    What is the center of gravity of the volume of liquid displaced by an immersed body called?

    <p>Center of buoyancy</p> Signup and view all the answers

    Which term refers to the resultant upward pressure of a fluid on an immersed body?

    <p>Upthrust</p> Signup and view all the answers

    What is NOT a reason for the buoyant force acting on a submerged body?

    <p>Internal shear forces mitigating external forces</p> Signup and view all the answers

    Where is the center of buoyancy located in relation to the center of gravity of the displaced liquid?

    <p>Above</p> Signup and view all the answers

    What force lifts a body totally or partially immersed in a fluid, according to the principle of buoyancy?

    <p>Weight of the fluid displaced by the body</p> Signup and view all the answers

    How can a relatively denser object be made to float on a less dense fluid?

    <p>By altering the shape</p> Signup and view all the answers

    What conditions are required for the stable equilibrium of a floating body?

    <p>All of the above</p> Signup and view all the answers

    According to the principle of buoyancy, what force lifts a body totally or partially immersed in a fluid?

    <p>Weight of the fluid displaced by the body</p> Signup and view all the answers

    How can a relatively denser object be made to float on a less dense fluid?

    <p>None of the mentioned</p> Signup and view all the answers

    What makes the minor losses in pipe flow?

    <p>Insignificant effect</p> Signup and view all the answers

    In series-pipe problems, what is true about head loss?

    <p>It is the same through each pipe</p> Signup and view all the answers

    What happens to the discharge through each pipe in series-pipe problems?

    <p>They are added up for total discharge</p> Signup and view all the answers

    Which statement is true for flow through parallel pipes?

    <p>The rate of discharge in the main line is not equal to the sum of the discharges in each of the parallel pipes</p> Signup and view all the answers

    What is unique about the velocity of flow in parallel pipes?

    <p>It is equal for all pipes</p> Signup and view all the answers

    In parallel pipes, what happens to the loss of head in each pipe?

    <p>It varies depending on the discharge rate</p> Signup and view all the answers

    As depth increases, what happens to the intensity of pressure on an immersed surface?

    <p>It increases</p> Signup and view all the answers

    What force causes the free surface of a liquid to contract to the smallest possible area?

    <p>Force of cohesion</p> Signup and view all the answers

    How does the hydraulic gradient line position relate to the centre line of a pipe?

    <p>Pressure head + velocity head</p> Signup and view all the answers

    Which force is responsible for the free surface of a liquid contracting like a sheet?

    <p>Force of adhesion</p> Signup and view all the answers

    What occurs to the intensity of the pressure on an immersed surface as the depth decreases?

    <p>It decreases</p> Signup and view all the answers

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