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Chemical Engineering :: Fluid Mechanics

  1. With the increase in depth, the hydrostatic pressure in an unaccelerated incompressible fluid (in a constant gravitational field)

  2. A.
    decreases.
    B.
    increases linearly.
    C.
    increases exponentially.
    D.
    remains constant.

  3. Flow measurement in an open channel is done by a/an

  4. A.
    venturimeter
    B.
    orificemeter
    C.
    weir
    D.
    rotameter

  5. Newton's law of viscosity relates the

  6. A.
    shear stress and velocity.
    B.
    velocity gradient and pressure intensity.
    C.
    shear stress and rate of angular deformation in a fluid.
    D.
    pressure gradient and rate of angular deformation.

  7. Applicability of Bernoulli's equation is limited to a/an __________ fluid, that does not exchange shaft work with the surroundings.

  8. A.
    incompressible
    B.
    non-viscous
    C.
    both (a) and (b)
    D.
    neither (a) nor (b)

  9. The equivalent diameter for fluid flow through square cross section channel of side 'x', for pressure drop calculation purpose is given by

  10. A.
    4x
    B.
    2x
    C.
    x
    D.
    x

  11. Hydraulic radius of 6" x 12" cross-section, is __________ inches.

  12. A.
    2
    B.
    0.5
    C.
    1.5
    D.
    none of these

  13. Baffles in mixing tanks are provided to

  14. A.
    reduce swirling and vortex formation.
    B.
    increase the structural strength of the tank.
    C.
    aid in rotational flow.
    D.
    none of these

  15. Which of the following equations is valid for laminar flow of a fluid through packed bed?

  16. A.
    Fanning equation
    B.
    Kozney - Karman equation
    C.
    Hagen-Poiseuille equation
    D.
    Blake-Plummer equation

  17. A pipe has a porous section of length L as shown in the figure. Velocity at the start of this section of V0. If fluid leaks into the pipe through the porous section at a volumetric rate per unit area q(x/L)2, what will be axial velocity in the pipe at any x ? Assume incompressible one dimensional flow i.e., no gradients in the radial direction.