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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. Pick out the wrong statement.

    2. A.
    Momentum transfer in laminar flow results from veclocity gradient.
    B.
    A fluid in equilibrium is not free from shear stress.
    C.
    The viscosity of a non-Newtonion fluid is a function of temperature only.
    D.
    both (b) and (c)

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  2. Pressure drag does not depend upon the

    3. A.
    roughness of surface of the body.
    B.
    pressure of main flow only.
    C.
    length of the body in flow direction.
    D.
    all (a), (b) and (c)

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  3. Dimension of absolute viscosity is

    4. A.
    ML-1T-1
    B.
    MLT-1
    C.
    ML-1T
    D.
    MLT

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  4. __________ pumps are axial flow pumps.

    5. A.
    Turbine
    B.
    Propeller
    C.
    Diffuser
    D.
    none of these

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  5. Brownian movement is prominent in the particle size range of __________ microns in case of settling of a particle in a fluid.

    6. A.
    2 to 3
    B.
    0.01 to 0.10
    C.
    200 to 300
    D.
    100 to 1000

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  6. For a particle settling in water at its terminal settling velocity, which of the following is true ?

    7. A.
    Buoyancy = weight + drag
    B.
    Weight = buoyancy + drag
    C.
    Drag = buoyancy + weight
    D.
    Drag = weight

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  7. A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is

    8. A.
    10 KPa
    B.
    20 KPa
    C.
    30 KPa
    D.
    40 KPa

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  8. Pick out the correct statement.

    9. A.
    A forced vortex occurs when fluid rotates as a solid about an axis.
    B.
    In laminar flow, Newton's law of viscosity does not apply.
    C.
    A free vortex occurs, when fluidrotates as a solid.
    D.
    In turbulent flow, there are neither cross-currents nor eddies.

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  9. Shear stress in a fluid flowing in a round pipe

    10. A.
    varies parabolically across the cross-section.
    B.
    remains constant over the cross-section.
    C.
    is zero at the centre and varies linearly with the radius.
    D.
    is zero at the wall and increases linearly to the centre.

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  10. The resistance wire used in a hot wire anemometer for conducting electrical current is made of

    11. A.
    copper
    B.
    tungsten
    C.
    chromium
    D.
    aluminium

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