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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Medium specific speed of turbine implies it is

Impulse turbine
Francis turbine
Any one of the above
Propeller turbine

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Hydraulics and Fluid Mechanics in ME
The flow ratio in case of Francis turbine varies from

0.6 to 0.9
0.15 to 0.3
0.4 to 0.5
1 to 1.5

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Hydraulics and Fluid Mechanics in ME
The power transmitted through the pipe is maximum when the head lost due to friction is equal to

One-third of the total supply head
Two-third of the total supply head
One-half of the total supply head
One-fourth of the total supply head

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Hydraulics and Fluid Mechanics in ME
When the velocity distribution is uniform over the cross-section, the correction factor for momentum is

1
43924
2

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Hydraulics and Fluid Mechanics in ME
If the net positive suction head (NPSH) requirement for the pump is not satisfied, then

Excessive power will be consumed
Efficiency will be low
No flow will take place
Cavitation will be formed

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Hydraulics and Fluid Mechanics in ME
The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is (Assume that boundary layer is entirely laminar)

0.40 cm
0.10 cm
0.05 cm
0.20 cm

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