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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece is

0.375
0.5
0.707
0.855

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Hydraulics and Fluid Mechanics in ME
The force of buoyancy is always __________ the weight of the liquid displaced by the body.

More than
None of these
Equal to
Less than

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Hydraulics and Fluid Mechanics in ME
With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on

a cylinder
a sphere
a streamlined body
a circular disc of plate held normal to flow

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Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of the fluid on an immersed body is called

buoyancy
all the above are correct
upthrust
center of pressure

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Hydraulics and Fluid Mechanics in ME
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

(2A√H₁)/(Cd × a√2g)
(2AH₁²)/(Cd × a√2g)
(2AH₁3/2)/(Cd × a√2g)
(2AH₁)/(Cd × a√2g)

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Hydraulics and Fluid Mechanics in ME
The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.

IG / Ax̅ below
Ax̅ / IG above
Ax̅ / IG below
IG / Ax̅ above

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