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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in __________ equilibrium.

Unstable
None of these
Neutral
Stable

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Hydraulics and Fluid Mechanics in ME
A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is

10 kN/m3
4.5 kN/m3
6 kN/m3
7.5 kN/m3

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Hydraulics and Fluid Mechanics in ME
According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

(2/3) × Cd (L - nH) × √(2g) × H²
(2/3) × Cd (L - nH) × √(2g) × H5/2
(2/3) × Cd (L - nH) × √(2gh)
(2/3) × Cd (L - 0.1nH) × √(2g) × H3/2

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Hydraulics and Fluid Mechanics in ME
If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by

H = Hg - hf
H = Hg × hf
H = Hg + hf
H = Hg/hf

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Hydraulics and Fluid Mechanics in ME
The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

Viscosity
Capillarity
Surface tension
Compressibility

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Hydraulics and Fluid Mechanics in ME
Which of the following instruments is used to measure flow on the application of Bernoulli’s theorem

Orifice plate
All of these
Venturimeter
pitot tube

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