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Mechanical Engineering :: Hydraulics and Fluid Mechanics

Hydraulics and Fluid Mechanics - Section 1
Hydraulics and Fluid Mechanics - Section 2
Hydraulics and Fluid Mechanics - Section 3
Hydraulics and Fluid Mechanics - Section 4
Hydraulics and Fluid Mechanics - Section 5
Hydraulics and Fluid Mechanics - Section 6
Hydraulics and Fluid Mechanics - Section 7
Hydraulics and Fluid Mechanics - Section 8
Hydraulics and Fluid Mechanics - section-5

  1. The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcy 's coefficient of friction for pipe, and l = Length of pipe )

    2. A.

    d = \((\frac { D^5 } { 8 f l })^\frac{1}{2}\)
    B.

    d = \((\frac { D^5 } { 8 f l })^\frac{1}{3}\)
    C.

    d = \((\frac { D^5 } { 8 f l })^\frac{1}{4}\)
    D.

    d = \((\frac { D^5 } { 8 f l })^\frac{1}{5}\)

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  2. The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)

    3. A.

    \(\frac { 8 } { 15 }\) Cd \(\sqrt2g \) x H
    B.

      \(\frac { 8 } { 15 }\) Cd \(\sqrt2g \) x  H3/2
    C.

      \(\frac { 8 } { 15 }\) Cd \(\sqrt2g \) x  H2
    D.

       \(\frac { 8 } { 15 }\) Cd \(\sqrt2g \) x H5/2

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  3. A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

    4. A.

    equal to.
    B.

    less than
    C.

    more than

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  4. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)

    5. A.

    wH
    B.

    wH/2
    C.

    wH2/2
    D.

    wH2/3

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  5. An error of 1% in measuring head over the apex of the notch (H) will produce an error of __________ in discharge over a triangular notch.

    6. A.

    1%
    B.

    1.5%
    C.

    2%
    D.

    2.5%

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