The stone ware sewers are used for carrying sewage and drainage from houses are

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Question
The stone ware sewers
Options
A. are used for carrying sewage and drainage from houses
B. are manufactured from clays and shales
C. after casting are dried and burnt at temperature 150�C, 700�C and 1200�C
D. are generally provided with a water proof cover by vaporising sodium chloride
E. all the above.

Correct Answer

all the above.

Waste Water Engineering problems

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4. Pick up the correct statement from the following :
Options
A. The ratio of the quantity of the diluting water to that of the sewage, is known as dilution factor
B. The automatic purification of polluted water, is known self purification phenomenon
C. The photosynthesis is carried out in the presence of sun light
D. Grab sample is generally obtained from the surface where turbulence mixes the sewage particles
E. All the above.

9. In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time
Options
A. 100 mm dia.
B. 150 mm dia.
C. 225 mm dia.
D. all of these.

10. Pick up the correct statement from the following :
Options
A. The circular section of sewers provides maximum hydraulic mean depth
B. The circular sewers are provided for separate sewerage system
C. The circular sewers work efficiently if the sections run at least half full
D. Two sewers of different shapes are said to be hydraulically equivalent if they discharge at the same rate while running full on the same grade
E. All the above.

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