A rain sanitary sewer is constructed to carry_________________ ?

Related Mcqs:

1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

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

   A. Inverted syphon
   B. Depressed sewer
   C. Sag pipe
   D. all of these

10. If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by_________________?

    A. Chezy
    B. Manning
    C. Bazin
    D. Kutter