# Civil Engineering - Hydraulics

### Exercise :: Hydraulics - Section 3

6.

Which one of the following equation is applicable to unsteady flow in open channels :

 A. B. C. D. Explanation:

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7.

Dimensions of the dynamic viscosity (μ) are

 A. MLT-2 B. M-1L-1T-1 C. ML-1T-2 D. ML-1T-1.

Explanation:

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8.

To avoid vapourisation, pipe lines are laid over the ridge so that these are above the hydraulic gradient line, not more than

 A. 2.4 m B. 6.4 m C. 10.0 m D. 5.0 m.

Explanation:

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9.

A jet projected at an angle of 45θ, 40 m from the foot of a vertical column, just reaches the top of the column. The height of the column is

 A. 15 m B. 20 m C. 30 m D. 40 m E. 60 m.

Explanation:

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10.

If Cv, Cc, Cd and Cr are the hydraulic coefficients of an orifice, then

 A. Cd = Cc . Cv B. Cr = 1 + Cv2/Cd C. Cv = Cc + Cd D. Cc = Cv/Cd