In a free vortex motion, the radial component of velocity everywhere is ________________?

Related Mcqs:

1. In a forced vortex, the velocity of flow everywhere within the fluid is__________________?

   A. maximum
   B. minimum
   C. zero
   D. non-zero finite
   E. unpredictable

2. A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?

   A. 1 : 5
   B. 1 : 2.5
   C. 1 :25
   D. 1:V5″
   E. 1 : 53/2

3. 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

4. The peoperty by virtue of which a liquid opposes relative motion between its different layers is called_________________?

   A. surface tension
   B. co-efficient of viscosity
   C. viscosity
   D. osmosis
   E. cohesion

5. The horizontal component of buoyant force is__________________?

   A. negligible
   B. same as buoyant force
   C. zero
   D. non of these

6. A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?

   A. 10 m/sec
   B. 25 m/sec
   C. 2 m/sec
   D. 50 m/sec
   E. 250 m/sec

7. The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as___________________?

   A. one dimensional flow
   B. uniform flow
   C. steady flow
   D. turbulent flow
   E. streamline flow

8. The velocity of jet of water travelling out of opening in a tank filled with water is proportional to___________________?

   A. head of water (h)
   B. h2
   C. V/T
   D. h2
   E. h3/1.

9. At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be_______________?

   A. minimum
   B. maximum
   C. zero
   D. negative value
   E. could be any value

10. An open vessel of water is accelerated up an inclined plane. The free water surface will___________________?

    A. be horizontal
    B. make an angle in direction of inclination of inclined plane
    C. make an angle in opposite direction to inclination of inclined plane
    D. any one of above is possible
    E. none of the above