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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The Prartdtl mixing length is

zero at the pipe wall
maximum at the pipe wall
None of these
independent of shear stress

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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

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

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Hydraulics & Fluid Mechanics
THEE HORIZONTAL COMPONENT OF BUOYANT FORCE IS

SAME AS BUOYANT FORCE
NEGLIGIBLE
None of these
ZERO

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Hydraulics & Fluid Mechanics
Operation of McLeod gauge used for low pressure measurement is based on the principle of

Boyle’s law
Pascal’s law
Charle’s law
gas law

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Hydraulics & Fluid Mechanics
A fluid is said to be ideal, if it is

inviscous
inviscous and incompressible
incompressible
inviscous and compressible

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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 : 2.5
1 :25
1:50
1 : 5

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