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HYDRAULICS AND FLUID MECHANICS IN ME

Hydraulics and Fluid Mechanics in ME
A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is

0.36
0.26
0.46
0.56

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Hydraulics and Fluid Mechanics in ME
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.

Sum
Geometric mean
Difference
Arithmetic mean

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Hydraulics and Fluid Mechanics in ME
The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

Specific speed
None of these
Normal speed
Unit speed

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Hydraulics and Fluid Mechanics in ME
The overall efficiency for a Pelton wheel lies between

0.75 to 0.85
0.65 to 0.75
0.85 to 0.90
0.50 to 0.65

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Hydraulics and Fluid Mechanics in ME
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)

wH2/3
wH/2
wH
wH2/2

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