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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
All the terms of energy in Bernoulli’s equation have dimension of

mass
energy
length
work

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Hydraulics and Fluid Mechanics in ME
Low specific speed of a pump implies it is

None of these
Mixed flow pump
Axial flow pump
Centrifugal pump

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Hydraulics and Fluid Mechanics in ME
For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred

Mixed flow
Reciprocating
Centrifugal
Axial flow

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Hydraulics and Fluid Mechanics in ME
Centrifugal pump is started with its delivery valve

Kept 50% open
Irrespective of any position
Kept fully closed
Kept fully open

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Hydraulics and Fluid Mechanics in ME
In series-pipe problems

the discharge is same through each pipe
the discharge through each pipe is added to obtain total discharge
the head loss is same through each pipe
a trial solution is not necessary

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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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