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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

600
675
300
337.5

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Hydraulics & Fluid Mechanics
THE THEORETICAL VALUE OF COEFFICIENT OF CONTRACTION OF A SHARP EDGED ORIFICE IS

0.95
1.01
0.86
0.611

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Hydraulics & Fluid Mechanics
SURFACE TENSION HAS THE UNITS OF

NETON/M
NEWTONS
NEW TONS/M
NEWTONS/M

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Hydraulics & Fluid Mechanics
Flow at constant rate through a tapering pipe is i) steady flow ii) uniform flow iii) unsteady flow iv) non-uniform flow The correct answer is

(i)and(iv)
(ii) and (iii)
(i) and (ii)
(ii) and (iv)

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

H3’2
H5/2
H1/2
H5’4 where H is head.

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Hydraulics & Fluid Mechanics
An open vessel of water is accelerated up an inclined plane. The free water surface will

make an angle in opposite direction to inclination of inclined plane
be horizontal
make an angle in direction of inclination of inclined plane
any one of above is possible

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