When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is
1.84 (L - 0.1nH)H3/2
1.84 (L - nH)H2
1.84 (L - 0.1nH)H5/2
1.84 (L - nH)H3
Correct Answer :
A. 1.84 (L - 0.1nH)H3/2
Related Questions
The tangential velocity of the water element having a free vortex is
Directly proportional to its distance from the centre
Inversely proportional to its distance from the centre
Directly proportional to its (distance)2 from the centre
Inversely proportional to its (distance)2 from the centre
Specific weight of sea water is more that of pure water because it contains
Dissolved air
Dissolved salt
Suspended matter
All of the above
The total pressure on an immersed surface inclined at an angle θ with the liquid surface is
wA
wx
wAx
wAx/sinθ
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Continuity equation
Bernoulli's equation
Pascal's law
Archimedess principle
The flow in a pipe or channel is said to be non-uniform when
The liquid particles at all sections have the same velocities
The liquid particles at different sections have different velocities
The quantity of liquid flowing per second is constant
Each liquid particle has a definite path
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Avoid the tendency of breaking away the stream of liquid
To minimise frictional losses
Both (A) and (B)
None of these
The purpose of a surge tank is
To control the pressure variations due to rapid changes in the pipe line flow
To eliminate water hammer possibilities
To regulate flow of water to turbines by providing necessary retarding head of water
All of the above
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The liquid particles at all sections have the same velocities
The liquid particles at different sections have different velocities
The quantity of liquid flowing per second is constant
Each liquid particle has a definite path
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Friction loss and flow
Length and diameter
Flow and length
Friction factor and diameter
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Steady flow
Turbulent flow
Vortex flow
Uniform flow
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d/6
d/4
d/2
d
The liquid used in manometers should have
Low density
High density
Low surface tension
High surface tension
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Equal
Directly proportional
Inversely proportional
None of these
The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcys coefficient of friction for pipe, and l = Length of pipe)
d = (D⁵/8fl)1/2
d = (D⁵/8fl)1/3
d = (D⁵/8fl)1/4
d = (D⁵/8fl)1/5
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Centre of pressure
Centre of gravity
Centre of buoyancy
Metacentre
Density of water is maximum at
0° C
0° K
4° C
100° C
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the Centroid, if
The area is horizontal
The area is vertical
The area is inclined
All of the above
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Less than 2000
Between 2000 and 4000
More than 4000
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It has uniform viscosity
It has zero viscosity
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Equal to
Less than
More than
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Sonic flow
Super-sonic flow
Hyper-sonic flow
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Lower
Same
Higher/lower depending on temperature
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Increases
Decreases
Remain constant
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10 m/sec²
9.81 m/sec²
9.75 m/sec²
9 m/sec
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Maximum
Minimum
Zero
Nonzero and finite
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2 meters of water column
3 meters of water column
5 meters of water column
6 meters of water Column
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0.34 times
0.67 times
0.81 times
0.95 times
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Froude number
Reynolds number
Weber's number
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wH
wH/2
wH2/2
wH2/3
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19.24 kPa
29.24 kPa
39.24 kPa
49.24 kPa