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Chemical Engineering :: Fluid Mechanics

Fluid Mechanics - Section 1
Fluid Mechanics - Section 2
Fluid Mechanics - Section 3
Fluid Mechanics - Section 4
Fluid Mechanics - Section 5
Fluid Mechanics - Section 6
Fluid Mechanics - Section 7
Fluid Mechanics - Section 8
Fluid Mechanics - Section 9
Fluid Mechanics - Section 10
Fluid Mechanics - Section 11
Fluid Mechanics - Section 12
Fluid Mechanics - Section 13
Fluid Mechanics - Section 14
Fluid Mechanics - Section 15
Fluid Mechanics - Section 16
Fluid Mechanics - Section-17

  1. The peripherial velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec.

    2. A.
    1.8
    B.
    12.4
    C.
    186.2
    D.
    736.4

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  2. Laminar flow is characterised by the nonexistence of

    3. A.
    pressure fluctuation.
    B.
    eddies.
    C.
    deviating velocities.
    D.
    all (a), (b)&(c).

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  3. The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the __________ length.

    4. A.
    equivalent
    B.
    transition
    C.
    Prandtl mixing
    D.
    none of these

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  4. Select the correct practical example of steady non-uniform flow.

    5. A.
    Motion of water around a ship in a lake.
    B.
    Motion of river around bridge piers.
    C.
    Steadily decreasing flow through a reducing section.
    D.
    Steadily increasing flow through a pipe.

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  5. Hydraulic diameter for non-circular ducts is equal to __________ times the area of flow divided by the perimeter.

    6. A.
    two
    B.
    three
    C.
    four
    D.
    eight

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  6. Terminal velocity is

    7. A.
    a constant velocity with no acceleration.
    B.
    a fluctuating velocity.
    C.
    attained after moving one-half of total distance.
    D.
    none of these.

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  7. Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f1 and that for smooth pipe is f2. Pick out the correct statement.

    8. A.
    f1 = f2
    B.
    f1 < f2
    C.
    f1 > f2
    D.
    data not sufficient to relate f1 & f2

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  8. For an incompressible fluid, the bulk modulus of elasticity is

    9. A.
    5 kg/m3
    B.
    ∞ N/m2
    C.
    1 N
    D.
    0 N/m

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  9. A fluid is a substance, that

    10. A.
    has to be kept in a closed container.
    B.
    is almost incompressible.
    C.
    has zero shear stress.
    D.
    flows when even a small shear is applied to it.

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  10. The pressure intensity is the same in all directions at a point in a fluid

    11. A.
    only when the fluid is frictionless.
    B.
    only when the fluid is at rest having zero velocity.
    C.
    when there is no motion of one fluid layer relative to an adjacent layer.
    D.
    regardless of the motion of one fluid layer relative to an adjacent layer.

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