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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

3.0 m
2.5 m
2.4 m
4.0 m

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Hydraulics and Fluid Mechanics in ME
If the ratio's of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.

Geometric similarity
None of these
Dynamic similarity
Kinematic similarity

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Hydraulics and Fluid Mechanics in ME
The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

[wa (V - v)²]/2g
[wa (V - v²)]/g
[wa (V - v)]/g
[wa (V - v)]/2g

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Hydraulics and Fluid Mechanics in ME
According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

A2/3 × M1/3 × m × i
A1/2 × M2/3 × m × i
A × M × m1/2 × i2/3
A × M × m2/3 × i1/2

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Hydraulics and Fluid Mechanics in ME
In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be

Sixteen times
Four times
Double
Eight times

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Hydraulics and Fluid Mechanics in ME
A liquid would wet the solid, if adhesion forces as compared to cohesion forces are

less
equal
more
less at low temperature and more at high temperature

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