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Hydraulics & Fluid Mechanics

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

H3’2
H1/2
H5’4 where H is head.
H5/2

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Hydraulics & Fluid Mechanics
The units of viscosity are

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

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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

675
337.5
600
300

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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 ?

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

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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 inclined
the area is vertical
All of these

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

Venturimeter
pitot tube
Orifice plate
rotameter

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