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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is

5
6
7
1

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Hydraulics and Fluid Mechanics in ME
In a reciprocating pump, air vessels are used to

Increase delivery head
Reduce suction head
Reduce acceleration head
Smoothen the flow

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Hydraulics and Fluid Mechanics in ME
All the terms of energy in Bernoulli’s equation have dimension of

mass
energy
work
length

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Hydraulics and Fluid Mechanics in ME
Which of the following is dimensionless?

Specific weight
Specific volume
Specific speed
Specific gravity

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Hydraulics and Fluid Mechanics in ME
Which of the following has highest coefficient of discharge ?

CipoUetti weir
Borda’s mouthpiece running full
venturimeter
sharp edged orifice

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Hydraulics and Fluid Mechanics in ME
The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly enlarged to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden enlargement is

(v₁² - v₂²)/2g
(v₁ - v₂)²/2g
(v₁ - v₂)²/g
(v₁² - v₂²)/g

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