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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
If the depth of water in an open channel is greater than the critical depth, the flow is called

Turbulent flow
Torrential flow
Critical flow
Tranquil flow

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Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by

dQ/Q = (dH/H)
dQ/Q = (3/4) × (dH/H)
dQ/Q = (3/2) × (dH/H)
dQ/Q = (1/2) × (dH/H)

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Hydraulics and Fluid Mechanics in ME
The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

μ π³ N² R² /3600 t
μ π³ N² R⁴ /3600 t
μ π³ N² R² /1800 t
μ π³ N² R⁴ /1800 t

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Hydraulics and Fluid Mechanics in ME
A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?

4 x (225)3/2 minutes
4 (225)1/3 minutes
4 x V225 minutes
4 minutes

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Hydraulics and Fluid Mechanics in ME
If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is

0.5
None of these
0.25
1

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Hydraulics and Fluid Mechanics in ME
The losses are more in

transition flow
laminar flow
critical flow
turbulent flow

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