Wetted perimeter of a regime channel for a discharge of 64 cumecs as per Lacey’s theory will be_________?

Related Mcqs:

1. As per Lacey’s theory, the silt factor is_________________?

   A. directly proportional to average par¬ticle size
   B. inversely proportional to average par¬ticle size
   C. directly proportional to square root of average particle size
   D. not related to average particle size

2. The ratio of rate of change of the discharge of an outlet to the rate of change of the discharge of distributing channel is called________________?

   A. proportionality
   B. flexibility
   C. setting
   D. sensitivity

3. The stage of river carrying a discharge of Q m7sec at a point is 10 m and slope of water surface is (1/4000). The discharge of a flood at the same point and same stage of 10 m with a water surface slope of(l/1000) will be________________?

   A. V2 Q m3/sec
   B. 0.5 Q mVsec
   C. 2 Q m3/sec
   D. 4 Q m3/sec

4. The “outlet discharge factor” is the duty at the head of_________________?

   A. main canal
   B. branch canal
   C. watercourse
   D. distributory

5. In a Sarda type fall, rectangular crest is used for discharge upto______________?

   A. 6 cumecs
   B. 10 cumecs
   C. 14 cumecs
   D. 20 cumecs

6. For a catchment area of 120 km2, the equilibrium discharge in m3/hour of an S-curve obtained by the summation of 6 hour unit hydro graph is_______________?

   A. 0.2 x 106
   B. 0.6 x 106
   C. 2.4 xlO6
   D. 7.2 xlO6

7. Which of the following methods is used to estimate flood discharge based on high water marks left over in the past ?

   A. slope-area method
   B. area-velocity method
   C. moving boat method
   D. ultra-sonic method

8. Which of the following canal outlets maintains a constant discharge ?

   A. non-modular outlet
   B. flexible outlet
   C. rigid module
   D. none of the above

9. Coefficient of discharge of an ogee spillway________________?

   A. depends on depth of approach and upstream slope
   B. depends on downstream apron interference and downstream submergence
   C. remains constant
   D. both (A) and (B)

10. To determine the discharge at a section in a stream from its rating curve, the required data are_______________?

    1) slope of water surface at the section
    2) stage at the section
    3) current meter readings at the section
    The correct answer is?

    A. (1) and (2)
    B. (2) and (3)
    C. only (2)
    D. only (3)