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Hydraulics & Fluid Mechanics

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 : 5
1 :25
1:50
1 : 2.5

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Hydraulics & Fluid Mechanics
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid (where pi and p2 are mass densities.)

steady flow
frictionless flow
uniform flow
incompressible flow

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Hydraulics & Fluid Mechanics
The flow which neglects changes in a transverse direction is known as

uniform flow
turbulent flow
one dimensional flow
steady flow

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Hydraulics & Fluid Mechanics
For measuring flow by a venturimeter, if should be installed in

inclined line with upward flow
horizontal line
vertical line
in any direction and in any location.

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Hydraulics & Fluid Mechanics
Mercury is often used in barometer because

its vapour pressure is so low that it may be neglected
both (B) and (C)
the height of barometer will be less
it is the best liquid

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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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