Hydraulics - Civil Engineering Questions and Answers

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The ratio of the hydraulic radius of a pipe running full to the hydraulic radius of a square section of a channel whose side is equal to the diameter of the pipe, is

\(\frac { 1 } { 2 } \)

\(\frac { 1 } { 3 } \)

\(\frac { 3 } { 4 } \)

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A body of dimensions 1.5 m x 1.0 m x 2 m weighs 3000 kg in water. Its specific gravity is

0.8

0.9

1.0

1.1

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An orifice is called a large orifice if water head, is

twice the diameter of the orifice

thrice the diameter of the orifice

four times the diameter of the orifice

five times the diameter of the orifice

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When a liquid rotates at constant angular velocity about a vertical axis of a rigid body, the pressure

increases linearly to its radial distance

varies inversely as the altitude along any vertical line

varies as the square of the radial distance

decreases as the square of the radial distance

none of these.

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For the two dimensional flow, the stream function is given by Ïˆ = 2xy. The velocity at a point (3, 4) is

6 m/sec

8 m/sec

10 m/sec

12 m/sec

15 m/sec.

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A floating body attains stable equilibrium if its metacentre is

at the centroid

above the centroid

below the centroid

anywhere.

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The unit of the viscosity is

kg sec/m²

Newton sec per m²

Newton-sec²/m³

m² per sec.