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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The peoperty by virtue of which a liquid opposes relative motion between its different layers is called

co-efficient of viscosity
viscosity
surface tension
osmosis

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

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

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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 : 2.5
1 :25
1:50
1 : 5

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Hydraulics & Fluid Mechanics
Surface energy per unit area of a surface is numerically equal to

surface tension
force of cohesion
force of adhesion
atmospheric pressure

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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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Hydraulics & Fluid Mechanics
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if

the area is horizontal
the area is vertical
All of these
the area is inclined

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