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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is

9.81 m/sec²
10m/sec²
10.2/m sec
9.75 m/sec²

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Hydraulics & Fluid Mechanics
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is

33 M/SEC
40 M/SEC
22.5 M/SEC
50 M/SEC

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Hydraulics & Fluid Mechanics
Operation of McLeod gauge used for low pressure measurement is based on the principle of

Boyle’s law
gas law
Charle’s law
Pascal’s law

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Hydraulics & Fluid Mechanics
The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is (where R is the radius of pipe)

2/3 R
3/4 R
1/3 R
1/2 R

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Hydraulics & Fluid Mechanics
The difference of pressure between the inside and outside of a liquid drop is

(d)p = 2T/r
(b)p = T/r
(a)p = Txr
p = T/2r

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Hydraulics & Fluid Mechanics
At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

could be any value
minimum
negative value
maximum

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