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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The flow in a pipe is neither laminar nor turbulent when Reynold number is

Between 2000 and 2800
Less than 2000
More than 2800
None of these

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Hydraulics and Fluid Mechanics in ME
The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by

[2(Vr + v) v]/ Vr²
[(Vr + v) v]/ Vr
[2(Vr - v) v]/ Vr²
[(Vr - v) v]/ Vr

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Hydraulics and Fluid Mechanics in ME
A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

14π R5/2/15Cd × a √(2g)
14π R7/2/15Cd × a √(2g)
14π R3/2/15Cd × a √(2g)
14π R1/2/15Cd × a √(2g)

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Hydraulics and Fluid Mechanics in ME
The gross or total head of the turbine is the ___________ of the water levels at the head race and tail race.

Sum
Difference
Product
None of these

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Hydraulics and Fluid Mechanics in ME
Newton's law of viscosity is a relationship between

Pressure, velocity and temperature
Shear stress and velocity
Shear stress and rate of shear strain
Rate of shear strain and temperature

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Hydraulics and Fluid Mechanics in ME
The speed of a pressure wave through a pipe depends upon

the bulk modulus for the fluid
the length of pipe
the original head
the viscosity of fluid

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