Hydraulic mean depth (Dm) for a circular pipe of diameter ‘D’ flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum ?

Related Mcqs:

1. The ratio of the hydraulic radius to the diameter of the channel, for maximum mean velocity of flow in a circular channel, in open channel flow is_________________?

   A. 0.3
   B. 0.9
   C. 0.03
   D. 0.66

2. The ratio of the depth of flow to the diameter of the channel for maximum discharge in a circular channel in open channel flow is________________?

   A. 0.1
   B. 0.55
   C. 0.95
   D. 1.85

3. The maximum discharge through a circular channel takes place, when the depth of the fluid flow is ______________ times the pipe diameter?

   A. 0.25
   B. 0.5
   C. 0.66
   D. 0.95

4. In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is_________________?

   A. 0.5
   B. 0.84
   C. 1.84
   D. 1.25

5. The pressure drop per unit length of pipe incurred by a fluid ‘X’ flowing through pipe is Δp. If another fluid ‘Y’ having both the specific gravity & density just double of that of fluid ‘X’, flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be__________________?

   A. Δp
   B. 2Δp
   C. Δp2
   D. Δp/2

6. Normal depth in open channel flow is the depth of flow in the channel ____________________?

   A. Corresponding to uniform flow
   B. Measured normal to the channel bed
   C. Corresponding to steady flow
   D. None of these

7. For laminar flow of Newtonian fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, μ = fluid viscosity ) ?

   A. μ
   B. 1/μ
   C. √μ
   D. 1/√μ

8. What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition ?

   A. 0.5
   B. 0.67
   C. 1
   D. 2

9. The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is_____________________?

   A. 0.5
   B. 1
   C. 1.5
   D. 2

10. If ‘x’ is the depth of flow in an open channel of large width, then the hydraulic radius is equal to________________?

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