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

Related Mcqs:

1. 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

2. 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

3. If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is__________________?

   A. 0.25
   B. 0.50
   C. 1.0
   D. none of the above

4. A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be__________________?

   A. less than 1 m/sec
   B. 1 m/sec
   C. 1.5 m/sec
   D. 2 m/sec

5. 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

6. With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on__________________?

   A. a circular disc of plate held normal to flow
   B. a sphere
   C. a cylinder
   D. a streamlined body

7. The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is_______________?

   A. constant over the cross section
   B. parabolic distribution across the section
   C. zero at the mid plane and varies linearly with distance from mid plane
   D. zero at plates and increases linearly to midpoint

8. When an ideal fluid flows past a sphere________________?

   A. highest intensity of pressure occurs around the circumference at right angles to flow
   B. lowest pressure intensity occurs at front stagnation point
   C. lowest pressure intensity occurs at rear stagnation point
   D. total drag is zero

9. If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will________________?

   A. rise until its weight equals the buoyant force
   B. tend to move downward and it may finally sink
   C. float
   D. none of the above

10. An ideal fluid is_______________?

    A. one which obeys Newton’s law of viscosity
    B. frictionless and incompressible
    C. very viscous
    D. frictionless and compressible