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

What is the correct definition of buoyant force?

<p>Displacement of fluid due to the submerged body (C)</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 (A)</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 (A)</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 (B)</p> Signup and view all the answers

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

<p>Upthrust (B)</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 (A)</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 (A)</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 (D)</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 (C)</p> Signup and view all the answers

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

<p>All of the above (D)</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 (C)</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 (C)</p> Signup and view all the answers

What makes the minor losses in pipe flow?

<p>Insignificant effect (A)</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 (C)</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 (D)</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 (C)</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 (A)</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 (A)</p> Signup and view all the answers

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

<p>It increases (A)</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 (B)</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 (D)</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 (A)</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 (D)</p> Signup and view all the answers

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