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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Flow of water in a pipe about 3 meters in diameter can be measured by

pitot tube
orifice plate
rotameter
venturi

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

0.707
0.855
1.00
0.611

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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

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

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Hydraulics & Fluid Mechanics
The resultant of all normal pressures acts

at center of pressure
at metacentre
vertically upwards
at e.g. of body

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Hydraulics & Fluid Mechanics
A perfect gas

None of these
is of theoretical interest
is incompressible
has constant viscosity

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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 ?

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

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