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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.

Increases
Remain same
None of these
Decreases

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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 major loss of energy in long pipes is due to

sudden contraction
friction
sudden enlargement
gradual contraction or enlargement

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Hydraulics and Fluid Mechanics in ME
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

Could be any value
Zero
Maximum
Minimum

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is suitable for small discharge and high heads?

Centrifugal pump
Axial flow pump
Reciprocating pump
Mixed flow pump

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Hydraulics and Fluid Mechanics in ME
A large Reynold number is indication of

Laminar flow
Highly turbulent flow
Steady flow
Smooth and streamline flow

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