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Hydraulics & Fluid Mechanics

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

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

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Hydraulics & Fluid Mechanics
Coefficient of velocity for Borda’s mouth piece running full is

0.707
0.611
0.855
1.00

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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
Ay between two stream lines represents

discharge
velocity
pressure
head

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Hydraulics & Fluid Mechanics
The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is (where R is the radius of pipe)

2/3 R
3/4 R
1/2 R
1/3 R

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Hydraulics & Fluid Mechanics
Free surface of a liquid tends to contract to the smallest possible area due to force of

surface tension
viscosity
cohesion
friction

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