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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of

0.8
1.2
1
0.75

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

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Hydraulics and Fluid Mechanics in ME
In centrifugal pumps, maximum efficiency is obtained when the blades are

Bent backward
Radial
Straight
Bent forward

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Hydraulics and Fluid Mechanics in ME
The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe)

0.75v²/2g
v²/2g
0.5v²/2g
0.375v²/2g

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Hydraulics and Fluid Mechanics in ME
According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies

Directly as fan speed
Square root of fan speed
Square of fan speed
Cube of fan speed

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Hydraulics and Fluid Mechanics in ME
The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)

K/ρ
None of the listed here
K.ρ
ρ/K

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