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_________________?

Related Mcqs:

1. The formula which accepts the value of rugosity coefficient n = 0.012 to be used in Manning’s formula, is given by______________________?

   A. Bazin
   B. Crimp and Bruges
   C. William-Hazen
   D. Kutter

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. A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?

   A. 1 : 5
   B. 1 : 2.5
   C. 1 :25
   D. 1:V5″
   E. 1 : 53/2

4. 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

5. The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is____________________?

   A. 100 cm
   B. 110 cm
   C. 120 cm
   D. 150 cm

6. 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

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. 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

9. The rational formula for peak drainage discharge, was evolved by_________________?

   A. Fruhling
   B. Lloyd David
   C. Kuichling
   D. All of these

10. For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is________________?

    A. 10 cm
    B. 12 cm
    C. 15 cm
    D. 18 cm