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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

1.84(L - 0.1nH)H5/2
1.84(L - 0.1nH)H3/2
1.84(L - nH)H3
1.84(L - nH)H2

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Hydraulics and Fluid Mechanics in ME
The power transmitted through the pipe is maximum when the head lost due to friction is equal to

One-half of the total supply head
One-fourth of the total supply head
One-third of the total supply head
Two-third of the total supply head

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Hydraulics and Fluid Mechanics in ME
The specific weight of water in S.I. units is taken as

9.81 × 10-6 N/mm3
9.81 × 103 N/m3
9.81 kN/m3
Any one of these

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Hydraulics and Fluid Mechanics in ME
The bulk modulus of elasticity

has the dimensions of 1/pressure
is large when fluid is more compressible
increases with pressure
is independent of pressure and viscosity

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Hydraulics and Fluid Mechanics in ME
The upper surface of a weir over which water flows is known is

nappe
sill
crest
weir top

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Hydraulics and Fluid Mechanics in ME
A fluid having no viscosity is known as

Ideal fluid
Non-Newtonian fluid
Newtonian fluid
Real fluid

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