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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The value of coefficient of discharge is __________ the value of coefficient of velocity.

Same as
Less than
None of these
More than

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Hydraulics and Fluid Mechanics in ME
The pressure at the summit of a syphon is

equal to atmospheric
less than atmospheric
more than atmospheric
None of these

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Hydraulics and Fluid Mechanics in ME
Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is

between 1.5 d and 2d
between d and 1.5 d
less than d
greater than 2d

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Hydraulics and Fluid Mechanics in ME
The torque required to overcome viscous resistance of a footstep bearing is (where μ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)

μπ²NR³/60t
μπ²NR⁴/60t
μπ²NR/60t
μπ²NR²/60t

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Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by

dQ/Q = 5/2 × (dH/H)
dQ/Q = 3 × (dH/H)
dQ/Q = 3/2 × (dH/H)
dQ/Q = 2 × (dH/H)

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Hydraulics and Fluid Mechanics in ME
The center of pressure of a surface subjected to fluid pressure is the point

similar to metacentre
at which all hydraulic forces meet
on the surface at which gravitational force acis
on the surface at which resultant pres-sure acts

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