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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The region between the separation streamline and the boundary surface of the solid body is known as

boundary layer
lift
wake
drag

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Hydraulics & Fluid Mechanics
Which of the following is demensionless

specific gravity
specific weight
specific speed
specific volume

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Hydraulics & Fluid Mechanics
A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?

1 : 5
1:50
1 : 2.5
1 :25

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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

between 1 and 100
less than 1
160
200

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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

minimum
maximum
negative value
could be any value

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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)

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

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