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

Related Mcqs:

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

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

2. Which of the following velocity potentials satisfies continuity equation ?

   A. x2y
   B. x2-y2
   C. cosx
   D. x2 + y2

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. The boundary layer thickness in turbulent flow varies as______________?

   A. x”7
   B. x,/2
   C. x4/5
   D. x3/5

   where x is the distance from leading edge

5. 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

6. For laminar flow in circular pipes, the Darcy’s friction factor f is equal to_________________?

   A. 16/Re
   B. 32/ Re
   C. 64/ Re
   D. none of the above where R,, is Reynolds number

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. 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

9. 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

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)