The ratio of maximum to average velocity in case of streamline flow between parallel plates is______________________?

Related Mcqs:

1. The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonian fluid in a circular pipe is_____________________?

   A. 0.5
   B. 1
   C. 2
   D. 0.66

2. In case of Couette flow, the fluid flow is between two large flat parallel plates with___________________?

   A. Top plate moving and the bottom plate fixed
   B. Bottom plate moving and the top plate fixed
   C. Both the plates fixed
   D. Both the plates moving

3. Velocity at a certain point in case of streamline flow is_________________?

   A. Constant
   B. Independent of time
   C. Both A. & B.
   D. Neither A. nor B.

4. In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)?

   A. Vavg
   B. 1.2 Vavg
   C. 1.5 Vavg
   D. 1.8 Vavg

5. 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

6. A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, η0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is________________?

   A. 10 KPa
   B. 20 KPa
   C. 30 KPa
   D. 40 KPa

7. For turbulent flow of Newtonian fluid in a circular cross-section pipe, the ratio of maximum to average fluid velocity is ________________?

   A. 0.5
   B. 1
   C. 0.66
   D. < 0.5

8. 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

9. A pipe of I.D. 4 m is bifurcated into two pipes of I.D. 2 m each. If the average velocity of water flowing through the main pipe is 5 m/sec, the average velocity through the bifurcated pipes is__________________?

   A. 20 m/sec
   B. 10 m/sec
   C. 5 √2 m/sec
   D. 5 m/sec

10. In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow ?

    A. Discharge of water by a centrifugal pump being run at a constant rpm
    B. Water flow in the suction and discharge pipe of a reciprocating pump
    C. Water discharge from a vertical vessel in which constant level is maintained
    D. Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe