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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
According to Bazin's formula, the discharge over a rectangular weir is mL2g x H3/2 where m is equal to

0.405 + (H/0.003)
0.405 + (0.003/H)
0.003 + (H/0.405)
0.003 + (0.405/H)

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Hydraulics and Fluid Mechanics in ME
Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m3, Q = Discharge of the pump in m3/s, Hs = Suction head in meters, and Hd = Delivery head in meters)

wQ (Hs + Hd)
wQHs
wQHd
wQ (Hs - Hd)

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Hydraulics and Fluid Mechanics in ME
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is

constant
dependent only on Reynolds number
dependent on relative roughness only
a function of Reynolds number and relative roughness

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is generally used to pump highly viscous fluid?

Screw pump
Air lift pump
Reciprocating pump
Centrifugal pump

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Hydraulics and Fluid Mechanics in ME
Centrifugal pump is started with its delivery valve

Irrespective of any position
Kept fully open
Kept fully closed
Kept 50% open

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Hydraulics and Fluid Mechanics in ME
The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as

turbulent flow
uniform flow
steady flow
one dimensional flow

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