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Civil Engineering :: Hydraulics

Hydraulics - Section 1
Hydraulics - Section 2
Hydraulics - Section 3
Hydraulics - Section 4
Hydraulics - Section 5
Hydraulics - Section 6

  1. Most economical section of a circular channel for maximum discharge

    2. A.

    depth of water = 0.95 diameter of circular section
    B.

    hydraulic mean depth = 0.286 diameter of circular section
    C.

    wetted perimeter = 2.6 diameter of circular section
    D.

    wetted perimeter = 2.83 depth of water
    E.

    all the above.

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  2. Unit of kinematic viscosity is
    3. A.

    m2/sec
    B.

    Newton sec/m2
    C.

    Newton sec/m3
    D.

    Kg sec/m2.

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  3. The moment of inertia of a floating body along its longitudinal axis and the volume of water displaced by it are I and V respectively. The height of the metacentre above centre of buoyancy of the body, is

    4. A.

    \(\frac { I } { 2V } \)
    B.

    \(\frac { 2I } { V } \)
    C.

    \(\frac { I } { V } \)
    D.

    \(\frac { 3I } { V } \)
    E.

    \([\frac { I} { V } ]^2\)

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  4. Time of emptying liquid from a hemispherical vessel through an orifice at its bottom, is

    5. A.

    \(\frac { nR^3/2 } { 15 Cd^2\sqrt{}2g} \)
    B.

    \(\frac { 2nR^3/2 } { 15 Cd^2\sqrt{}2g} \)
    C.

    \(\frac { 7nR^3/2 } { 15 Cd^2\sqrt{}2g} \)
    D.

    \(\frac { 14nR^3/2 } { 15 Cd^2\sqrt{}2g} \)

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  5. Critical depth (h) of a channel, is

     

     

    6. A.

    h = \(\frac { v^2 } { g } \)
    B.

    h = \(\frac { v^2 } { 2g } \)
    C.

    h = \(\frac { v } {2 g } \)
    D.

    h = \(\frac { v } {g } \)

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  6. The ratio of maximum velocity to average velocity of viscous fluid through a circular pipe is

    7. A.

    0.5
    B.

    0.75
    C.

    1.25
    D.

    2.00

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  7. The shear stress distribution in viscous fluid through a circular pipe is :
    8. A.

    maximum at the centre
    B.

    maximum at the inside of surface
    C.

    same throughout the section
    D.

    none of these.

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  8. Product of Renold number, Froud's number and Mach number is :
    9. A.

    \( \frac { pv^3L} { uC\sqrt{}Lg } \)
    B.

    \( \frac { pVL^3} { uC\sqrt{}Lg } \)
    C.

    \( \frac { pV^2L^2} { uC\sqrt{}Lg } \)
    D.

    \( \frac { 1.5pVL^2} { uC\sqrt{}Lg } \)

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  9. Pick up the correct statement from the following :
    10. A.

    For tranquil flow h greatet than \(\sqrt{2g}\) or  V lessthan \(\frac { V^2} { 2 g} \)
    B.

    For critical flow  h = \(\frac { V^2} { 2 g} \)
    C.

    For torrential flow h greater than \(\frac { 2} { g } \) or V lessthan \(\sqrt{gh}\)
    D.

    None of these.

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  10. The side slope of Cipolletti weir is generally kept

    11. A.

    1 to 4
    B.

    1 to 3
    C.

    1 to 2
    D.

    1 : 5

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