Civil Engineering - Water Supply Engineering

6. 

Ground water from artesian wells

A. contains no suspended materials
B. contains dissolved salts
C. may be saltish and hard
D. generally require lesser treatment
E. all the above.

Answer: Option E

Explanation:

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7. 

Property of earth to allow water to pass through it, is known as

A. perviousness
B. porosity
C. permeability
D. transmissibility.

Answer: Option A

Explanation:

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8. 

Derivation of Thiem's formula
is based on the assumption

A. the aquifer is homogeneous, isotropic and of infinite depth and area
B. the well is sunk through the full depth of the aquifer
C. the flow lines are radial and horizontal, and the flow is laminar
D. for hydraulic gradient in Darcy's equation, tangent value is used for sine value
E. all the above.

Answer: Option E

Explanation:

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9. 

Pick up the incorrect statement from the following :

A. Porosity of clay sand soil is 45%
B. Porosity of pure sand is 35%
C. Porosity of sand stone is up to 15%
D. Least porosity is that of granite and quartz
E. None of these.

Answer: Option E

Explanation:

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10. 

Water is supplied from the source to the treatment plant under gravity in

A. Calcutta
B. Delhi
C. Madras
D. Bombay.

Answer: Option D

Explanation:

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