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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)

Cc × Cr
Cv × Cr
Cc × Cv
Cc/Cr

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

ρ ω2 r2
2ρ ω2 r2
ρ ω2 r2/2
ρ ω2 r2/4

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Hydraulics and Fluid Mechanics in ME
A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit discharge of wheel is

0.25 m3/s
1.5 m3/s
2.5 m3/s
0.5 m3/s

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Hydraulics and Fluid Mechanics in ME
The vapour pressure over the concave surface is

greater than the vapour pressure over the plane surface
equal to the vapour pressure over the plane surface
less man the vapour pressure over the plane surface
zero

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Hydraulics and Fluid Mechanics in ME
When the flow parameters at any given instant remain same at every point, then flow is said to be

laminar
uniform
quasi static
steady state

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Hydraulics and Fluid Mechanics in ME
Stream lines and path lines always coincide in case of

laminar flow
steady flow
turbulent flow
uniform flow

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