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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be

Steep
First rise and then fall
Nearly horizontal
Horizontal

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Hydraulics and Fluid Mechanics in ME
Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is

between 1.5 d and 2d
between d and 1.5 d
less than d
greater than 2d

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Hydraulics and Fluid Mechanics in ME
The Bernoulli's equation is based on the assumption that

No force except gravity acts on the fluid
All of these
There is no loss of energy of the liquid flowing
The velocity of flow is uniform across any cross-section of the pipe

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Hydraulics and Fluid Mechanics in ME
In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be

Partially running free
Running full
Running free
Partially running full

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Hydraulics and Fluid Mechanics in ME
Bulk modulus of a fluid __________ as the pressure increases.

Decreases
None of these
Increases
Remain same

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Hydraulics and Fluid Mechanics in ME
The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, μ = Viscosity of the liquid, and w = Specific weight of the flowing liquid)

32μvl/wd²
8μvl/wd²
4μvl/wd²
16μvl/wd²

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