# Civil Engineering - Hydraulics

### Exercise :: Hydraulics - Section 1

41.

The horizontal component of the force on a curved surface is equal to

 A. weight of liquid vertically below the curved surface B. force on a vetical projection of the curved surface C. product of pressure at its centroid and the area D. weight of liquid retained by the curved area.

Explanation:

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42.

The radius of gyration of the water line of a floating ship is 4 m and its metacentric height is 72.5 cm. The period of oscillation of the ship, is

 A. π B. 2π C. 3π D. 4π E. π/2

Explanation:

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43.

A pipe consisting of several pipes of varying diameters and lengths, may be replaced by an equivalent pipe of diameter D of length

 A. B. C. D.

Explanation:

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44.

The Empirical formula for discharge over large rectangular weirs, is known as

 A. Francis formula B. Bazin formula C. Rehbook formula D. Kutter's formula.

Explanation:

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45.

The diameter (d) of a nozzle fixed at the end of a pipe (diameter D, length L) for maximum energy, is

 A. B. C. D.