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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The density of water is 1000 kg/m3 at

0°C
4°C
0°K
20°C

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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.)

frictionless flow
incompressible flow
uniform flow
steady flow

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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

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

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Hydraulics & Fluid Mechanics
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is

22.5 M/SEC
50 M/SEC
40 M/SEC
33 M/SEC

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Hydraulics & Fluid Mechanics
Least possible value of correction factor for i) kinetic energy is zero ii) kinetic energy is 1 iii) momentum is zero iv) momentum is 1 The correct statements are

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

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Hydraulics & Fluid Mechanics
Specific weight of sea water is more that of pure water because it contains

dissolved air
All of these
suspended matter
dissolved salt

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