For design purposes, the normal rate of infiltration of ground water into the sewer, is___________________?

Related Mcqs:

1. You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at___________________?

   A. Full depth B. Half full C. Two third full D. Three fourth full...

2. 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...

3. The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is________________________?

   A. 20 cm B. 25 cm C. 40 cm D. 50 cm...

4. 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...

5. If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is__________________?

   A. 1.39 m B. 1.49 m C. 1.59 m D. 1.69 m...

6. 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...

7. 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...

8. Assertion A.: The minimum self cleansing velocity in the sewer, at least once a day, must be generated. Reason (R): If certain deposition takes place and is not removed, it obstructs free flow and causes further deposition leading to complete blocking of the sewer?

   A. Both A and R are true and R is the correct explanation of A B. Both A and R are true but R is not a correct explanation of A C. A is true but R is false D. A is false but R is true...

9. 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...

10. If the side of a square sewer is 1000 mm, the diameter of a hydraulically equivalent circular section, is___________________?

    A. 1045 mm B. 1065 mm C. 1075 mm D. 1095 mm...