The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called ____________________?

Related Mcqs:

1. weight of water, the hydraulic mean depth of the sewer and the bed slope w is the unit of the sewer, then the tractive force exerted by flowing water, is________________________?

   A. w r S S B. w r1/2 C. w r S D. w r2/3...

2. The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is_________________?

   A. 1 in 100 upward B. 1 in 500 upward C. 1 in 100 downward D. 1 in 503 upward...

3. For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of___________________?

   A. 100 cm B. 120 cm C. 140 cm D. 160 cm...

4. If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is__________________?

   A. 1 in 60 B. 1 in 100 C. 1 in 120 D. None of these...

5. If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is___________________?

   A. 1 in 60 B. 1 in 100 C. 1 in 120 D. None of these...

6. If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is________________?

   A. 1 in 60 B. 1 in 100 C. 1 in 120 D. None of these...

7. In Chezy’s formula V = C rs for calculating the velocity of flow in circular sewer of diameter running full, the value of hydraulic mean radius is_______________?

   A. D B. D /2 C. D/3 D. D/4...

8. If the flame of a miner’s safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains_______________?

   A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen...

9. The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be__________________?

   A. 0.9 cm B. 1.2 m C. 1.5 m D. > 1.5 m...

10. The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is______________?

    A. 0.68 m B. 0.88 m C. 1.36 m D. 1.76 m...