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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Flow occurring in a pipeline when a valve is being opened is

vortex
steady
laminar
unsteady

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Hydraulics and Fluid Mechanics in ME
In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)

2p/sin (α/2)
p/sinα
p/2sinα
2p/sinα

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Hydraulics and Fluid Mechanics in ME
A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is

27,000 kg
13,500 kg
18,000 kg
9,000 kg

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Hydraulics and Fluid Mechanics in ME
The major loss of energy in long pipes is due to

friction
sudden enlargement
gradual contraction or enlargement
sudden contraction

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Hydraulics and Fluid Mechanics in ME
The dynamic viscosity of gases __________ with rise in temperature.

Remain unaffected
None of these
Decreases
Increases

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

sill
crest
weir top
nappe

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