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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be

337.5
300
600
675

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Hydraulics & Fluid Mechanics
The discharge through a V- notch varies as

H1/2
H3’2
H5/2
H5’4 where H is head.

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Hydraulics & Fluid Mechanics
Normal depth in open channel flow is the depth of flow corresponding to

unsteady flow
Steady flow
uniform flow
laminar flow

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

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

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Hydraulics & Fluid Mechanics
Which of the following instrument can be used for measuring speed of an aeroplane

pitot tube
Orifice plate
rotameter
Venturimeter

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Hydraulics & Fluid Mechanics
The units of viscosity are

metre2/se
newton-sec/metre2
kg sec/metre
newton-sec/metre

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