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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Ay between two stream lines represents

velocity
discharge
pressure
head

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

H3/2
H5/2
H1/2
H

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Hydraulics & Fluid Mechanics
Drag force is a function of i) projected area of the body ii) mass density of the fluid iii) velocity of the body The correct answer is

(i) and (ii)
(ii) and (iii)
(i), (ii) and (iii)
(i) and (iii)

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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 ?

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

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Hydraulics & Fluid Mechanics
A large Roynold number is indication of

turbulent flow
smooth and streamline flow
LAMINAR FLOW
highly turbulent flow.

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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
between 1 and 100
160
less than 1

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