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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
In a Sutro weir, the discharge is proportional to (where H is head)

H5/2
H3/2
H1/2
H

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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

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

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Hydraulics & Fluid Mechanics
The discharge over a broad crested weir is maximum when the depth of flow is (where H is the available head)

2 H/3
H/2
H/3
2 H/5

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Hydraulics & Fluid Mechanics
If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is

200
less than 1
160
between 1 and 100

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Hydraulics & Fluid Mechanics
Uniform flow occurs when

size and cross section change uniformly along length
the flow is steady
size and shape of the cross section in a particular length remain constant
the flow is streamline

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Hydraulics & Fluid Mechanics
A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?

2 m/sec
25 m/sec
10 m/sec
50 m/sec

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