29 Questions
What should be true about the center of buoyancy and the center of gravity of an object?
They must be on the same vertical line
What forms a righting couple in the context of floating objects?
The center of gravity and the center of buoyancy
What is the Metacentric height defined as?
Distance between center of buoyancy and metacenter
Where is the Metacenter located in relation to a floating body?
Midpoint between external buoyant force and center line of body
When a floating body is slightly displaced in a liquid, about which point does it oscillate?
Metacenter
How is the Metacenter defined when a body floating in a liquid is slightly displaced?
Intersection point of vertical upward force through CG and center line
What is the correct definition of buoyant force?
Displacement of fluid due to the submerged body
Which principle states that the resultant upward pressure of a fluid on a floating body equals the weight of the fluid displaced?
Bernoulli’s theorem
In buoyancy, what is the principal cause of action for a body submerged in fluid?
Displacement of fluid due to the submerged body
What is the center of gravity of the volume of liquid displaced by an immersed body called?
Center of buoyancy
Which term refers to the resultant upward pressure of a fluid on an immersed body?
Upthrust
What is NOT a reason for the buoyant force acting on a submerged body?
Internal shear forces mitigating external forces
Where is the center of buoyancy located in relation to the center of gravity of the displaced liquid?
Above
What force lifts a body totally or partially immersed in a fluid, according to the principle of buoyancy?
Weight of the fluid displaced by the body
How can a relatively denser object be made to float on a less dense fluid?
By altering the shape
What conditions are required for the stable equilibrium of a floating body?
All of the above
According to the principle of buoyancy, what force lifts a body totally or partially immersed in a fluid?
Weight of the fluid displaced by the body
How can a relatively denser object be made to float on a less dense fluid?
None of the mentioned
What makes the minor losses in pipe flow?
Insignificant effect
In series-pipe problems, what is true about head loss?
It is the same through each pipe
What happens to the discharge through each pipe in series-pipe problems?
They are added up for total discharge
Which statement is true for flow through parallel pipes?
The rate of discharge in the main line is not equal to the sum of the discharges in each of the parallel pipes
What is unique about the velocity of flow in parallel pipes?
It is equal for all pipes
In parallel pipes, what happens to the loss of head in each pipe?
It varies depending on the discharge rate
As depth increases, what happens to the intensity of pressure on an immersed surface?
It increases
What force causes the free surface of a liquid to contract to the smallest possible area?
Force of cohesion
How does the hydraulic gradient line position relate to the centre line of a pipe?
Pressure head + velocity head
Which force is responsible for the free surface of a liquid contracting like a sheet?
Force of adhesion
What occurs to the intensity of the pressure on an immersed surface as the depth decreases?
It decreases
Test your knowledge of buoyancy principles with this quiz. Questions cover topics such as the equilibrium of a floating body, Archimedes' principle, and the concept of upthrust or buoyant force.
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