The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called

The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the submerged body is called

A

Up-thrust

B

Reaction

C

Buoyancy

D

Metacentre

Consider the following statements related to uplift pressure in gravity dams: 1. A drainage gallery reduces the uplift pressure at all levels below the gallery. 2. A drainage gallery below upstream water level reduces the uplift pressure at all levels below the upstream water level. 3. A grout curtain near the heel reduces seepage and uplift pressure everywhere on the gravity dam whatever the upstream water level. Which of the above statements are correct?

A

2 and 3 only

B

1 and 2 only

C

1 and 3 only

D

1, 2 and 3

The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where IG = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface, and x = Depth of centre of gravity of the immersed surface from the liquid surface)

A

(IG/Ax̅) - x̅

B

(IG/x̅) - Ax̅

C

(Ax̅/IG) + x̅

D

(IG/Ax̅) + x̅

The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where $${I_{\text{G}}}$$ = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface and x = Depth of centre of gravity of the immersed surface from the liquid surface)

A

$$\frac{{{I_{\text{G}}}}}{{{\text{A}}\overline {\text{x}} }} - \overline {\text{x}} $$

B

$$\frac{{{I_{\text{G}}}}}{{\overline {\text{x}} }} - {\text{A}}\overline {\text{x}} $$

C

$$\frac{{{\text{A}}\overline {\text{x}} }}{{{I_{\text{G}}}}} + \overline {\text{x}} $$

D

$$\frac{{{I_{\text{G}}}}}{{{\text{A}}\overline {\text{x}} }} + \overline {\text{x}} $$

The resultant upward pressure of the fluid on an immersed body is called

A

upthrust

B

buoyancy

C

center of pressure

D

all the above are correct

What is the resultant upward pressure of a fluid on an immersed body called?

A

Buoyancy

B

Metacentre

C

Upthrust

D

Reaction pressure

The resultant pressure on a body submerged in a fluid due to the fluid acts at which of the following points in the body?

A

Centre of pressure

B

Centre of mass

C

Centre of buoyancy

D

Metacentre

A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is
Hydraulics and Fluid Mechanics in ME mcq question image

Hydraulics and Fluid Mechanics in ME mcq question image

A

$$\frac{{{\text{b}}{{\text{d}}^2}}}{{12}} + \overline {\text{x}} $$

B

$$\frac{{{{\text{d}}^2}}}{{12\overline {\text{x}} }} + \overline {\text{x}} $$

C

$$\frac{{{{\text{b}}^2}}}{{12}} + \overline {\text{x}} $$

D

$$\frac{{{{\text{d}}^2}}}{{12}} + \overline {\text{x}} $$

The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to

A

Buoyancy

B

Equilibrium of a floating body

C

Archimede's principle

D

Bernoulli's theorem

"Any body that is completely or partially submerged in a ﬂuid (gas or liquid) at rest is acted upon by an upward or buoyant force, the magnitude of which is equal to the weight of the ﬂuid displaced by the body." Which is this law?

A

Charles' Law

B

Boyle's Law

C

Archimedes' Principle

D

Newton's Second Law of Motion

The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called

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