Which of the following velocity potentials satisfies continuity equation ?

Related Mcqs:

1. The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid______________?

   A. steady flow
   B. uniform flow
   C. incompressible flow
   D. frictionless flow

   where pi and p2 are mass densities

2. Equation of continuity is based on the principle of conservation of_________________?

   A. mass
   B. energy
   C. momentum
   D. none of the above

3. 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

4. A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be________________?

   A. 1 m
   B. 10m
   C. 100m
   D. none of the above

5. The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is_______________?

   A. 1/2
   B. 2/3
   C. 3/2
   D. 2

6. 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

7. 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

8. Coefficient of velocity of venturimeter_________________?

   A. is independent of Reynolds number
   B. decreases with higher Reynolds number
   C. is equal to the coefficient of discharge of venturimeter
   D. none of the above

9. For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be_________________?

   A. 300
   B. 337.5
   C. 600
   D. 675

10. When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies________________?

    A. linearly with radial distance
    B. as the square of the radial distance
    C. inversely as the square of the radial distance
    D. inversely as the radial distance