Civil Engineering - Hydraulics

11. 

Most economical section of a circular channel for maximum discharge

A. depth of water = 0.95 diameter of circular section
B. hydraulic mean depth = 0.286 diameter of circular section
C. wetted perimeter = 2.6 diameter of circular section
D. wetted perimeter = 2.83 depth of water
E. all the above.

Answer: Option E

Explanation:

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12. 

Unit of kinematic viscosity is

A. m2/sec
B. Newton sec/m2
C. Newton sec/m3
D. Kg sec/m2.

Answer: Option A

Explanation:

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13. 

The moment of inertia of a floating body along its longitudinal axis and the volume of water displaced by it are I and V respectively. The height of the metacentre above centre of buoyancy of the body, is

A.
B.
C.
D.
E.

Answer: Option C

Explanation:

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14. 

Time of emptying liquid from a hemispherical vessel through an orifice at its bottom, is

A.
B.
C.
D.

Answer: Option D

Explanation:

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15. 

Critical depth (h) of a channel, is

A.
B.
C.
D.

Answer: Option A

Explanation:

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