Separation of flow occurs when_________________?

Related Mcqs:

1. In case of an airfoil, the separation of flow occurs________________?

   A. at the extreme rear of body
   B. at the extreme front of body
   C. midway between rear and front of body
   D. any where between rear and front of body depending upon Reynolds number

2. Two pipe systems are said to be equivalent when_________________?

   A. head loss and discharge are same in two systems
   B. length of pipe and discharge are same in two systems
   C. friction factor and length are same in two systems
   D. length and diameter are same in two systems

3. The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be_________________?

   A. 0.423 D
   B. 0.577 D
   C. 0.223 D
   D. 0.707 D

   where D is the depth of flow

4. In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is_________________?

   A. 22.5 m/sec
   B. 33 m/sec
   C. 40 m/sec
   D. 90 m/sec

5. In steady flow of a fluid, the total accele ration of any fluid particle______________?

   A. can be zero
   B. is never zero
   C. is always zero
   D. is independent of coordinates

6. If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be___________________?

   A. from reservoir A to reservoirs B and C
   B. from reservoir B to reservoirs C and A
   C. from reservoir C to reservoirs A and B
   D. unpredictable

7. The velocity distribution for laminar flow through a circular tube__________________?

   A. is constant over the cross-section
   B. varies linearly from zero at walls to maximum at centre
   C. varies parabolically with maximum at the centre
   D. none of the above

8. The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is________________?

   A. 0.223 R
   B. 0.423 R
   C. 0.577 R
   D. 0.707 R

   where R is radius of pipe

9. The discharge over a broad crested weir is maximum when the depth of flow is_______________?

   A. H/3
   B. H/2
   C. 2 H/5
   D. 2 H/3

   where H is the available head

10. Flow at constant rate through a tapering pipe is________________?

    1. steady flow
    2. uniform flow
    3. unsteady flow
    4. non-uniform flow
    The correct answer is?

    A. (1) and (2)
    B. (1)and(iv)
    C. (2) and (3)
    D. (2) and (4)