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_______________?

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. If D is the diameter of a circular sewer and D’ is the top horizontal diameter of an equivalent egg shaped section, the relationship which holds good, is_______________?

   A. D’ = 0.64 D B. D’ = 0.74 D C. D’ = 0.84 D D. D’ = 0.94 D...

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. running partially full with central angle , For a circular sewer of diameter__________________?

   A. d/D = ½ (1 – – B. a/A C. r/R = [1 – D. All the above...

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. Hydraulic mean radius is_______________?

   A. Mean radius of sewer B. Difference in heads between two points in circular pipes C. Mean of radii in a pipe line of varying cross -sections D. Cross-sectional area/wetted perimeter...

8. If the depth of flow in a circular sewer is 1/4th of its diameter D, the wetted perimeter is______________?

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

9. 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...

10. The Chezy’s constant C in the formula V = C_________________?

    A. Size of the sewer B. Shape of the sewer C. Roughness of sewer surface D. All the above...