Sewer pipes need be checked for_________________?

Related Mcqs:

1. ¾th or ¼th extra space is left in sewer pipes at maximum discharge for_________________?

   A. Low estimates of the average and maximum flows B. Large scale infiltration of storm water C. Unexpected increase in population D. All the above...

2. 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...

3. 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...

4. 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...

5. 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...

6. 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...

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. 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...

10. Which one of the following tests is used for testing sewer pipes ?

    A. Water test B. Ball test C. Mirror test D. All of these...