Hydraulics and Fluid Mechanics - Civil Engineering - Civil Engineering Questions and Answers

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For pipes, laminar flow occurs when Roynolds number is

less than 2000

between 2000 and 4000

more than 4000

less than 4000

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The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

2.4 m

3.0 m

4.0 m

2.5 m

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The maximum thickness of boundary layer in a pipe of radius r is

r/2

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The speed of a pressure wave through a pipe depends upon

the length of pipe

the viscosity of fluid

the bulk modulus for the fluid

the original head

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Practical fluids

are viscous

possess surface tension

are compressible

possess all the above properties

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General energy equation holds for

steady flow

turbulent flow

laminar flow

non-uniform flow

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The angle of contact in case of a liquid depends upon

the nature of the liquid and the solid

the material which exists above the free surface of the liquid

both of die above

any one of the above

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When the velocity distribution is uniform over the cross-section, the correction factor for momentum is

4/3

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Size of a venturimeter is specified by

pipe diameter

throat diameter

angle of diverging section

both pipe diameter as well as throat diameter