Ay between two stream lines represents________________?

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. Stream lines and path lines always coincide in case of__________________?

   A. steady flow
   B. laminar flow
   C. uniform flow
   D. turbulent flow

3. Metacentric height for small values of angle of heel is the distance between the________________?

   A. centre of gravity and centre of buoy-ancy
   B. centre of gravity and metacentre
   C. centre of buoyancy and metacentre
   D. free surface and centre of buoyancy

4. 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

5. An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to_______________?

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

6. Which of the following is used to measure the discharge ?

   A. current meter
   B. venturimeter
   C. pitot tube
   D. hotwire anemometer

7. The wake_______________?

   A. always occurs before a separation point
   B. always occurs after a separation point
   C. is a region of high pressure intensity
   D. none of the above

8. Drag force is a function of________________?

   1. projected area of the body
   2. mass density of the fluid
   3. velocity of the body
   The correct answer is ?

   A. (1) and (2)
   B. (1) and (3)
   C. (2) and (3)
   D. (1), (2) and (3)

9. Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by________________?

   A. 5%
   B. 10%
   C. 15%
   D. 20%

10. A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then________________?

    1. the ball will move to the front
    2. the bubble will move to the front
    3. the ball will move to the rear
    4. the bubble will move to the rear
    Find out which of the above statements are correct ?

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