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Civil Engineering :: Hydraulics

  1. The horizontal component of the force on a curved surface is equal to

  2. A.

    weight of liquid vertically below the curved surface

    B.
    force on a vetical projection of the curved surface
    C.

    product of pressure at its centroid and the area

    D.

    weight of liquid retained by the curved area.

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  3. The radius of gyration of the water line of a floating ship is 4 m and its metacentric height is 72.5 cm. The period of oscillation of the ship, is

  4. A.
    π
    B.
    C.

    D.
    E.

    π/2

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  5. A pipe consisting of several pipes of varying diameters and lengths, may be replaced by an equivalent pipe of diameter D of length

  6. A.

    L = \(D^4\) [ \(\frac { l1 } { d1^4 } \)+\(\frac { l2 } { d2^4 } \)+\(\frac { l3 } { d3^4 } \)+......]

    B.

    L =\(D^3\) [\(\frac { l1 } { d1^3} \)+\(\frac { l2 } { d2^3 } \)+\(\frac { l3 } { d3^3 } \)+......]

    C.

    L = \(D^5\)\(\frac { l1 } { d1^5 } \)+\(\frac { l2 } { d2^5 } \)+\(\frac { l3 } { d3^5 } \)+......]

    D.

    L = \(D^2\)\(\frac { l1 } { d1^2 } \)+\(\frac { l2 } { d2^2 } \)+\(\frac { l3 } { d3^2} \)+.....]

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  7. The Empirical formula Q = [.405-\(\frac { 0.003 } { Q } \)\(\sqrt2gH^3/2{}\)for discharge over large rectangular weirs, is known as

  8. A.

    Francis formula

    B.

    Bazin formula

    C.

    Rehbook formula

    D.

    Kutter's formula.

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  9. The diameter (d) of a nozzle fixed at the end of a pipe (diameter D, length L) for maximum energy, is

  10. A.

    \( 3\sqrt \frac { D^3} { 8fL } \)

    B.

    \(\sqrt \frac { D^2} { 8fL } \)

    C.

    \( 4\sqrt \frac { D^2} { 8fL } \)

    D.

    \(\sqrt \frac { D^2} { 4fL } \)

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  11. Pick up the correct statement regarding Borda's mouth piece running full from the following :

  12. A.

    Actual velocity at the out let is\(\sqrt{gH}\)

    B.

    Theoretical velocity at the outlet is \(\sqrt{2gH}\)

    C.

    Coefficient of velocity is \(1/\sqrt{2}\)

    D.

    Coefficient of contraction is 1

    E.

    All the above.

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  13. Differential manometers are used to measure

  14. A.

    pressure in water channels, pipes, etc.

    B.

    difference in pressure at two points

    C.
    atmospheric pressure
    D.

    very low pressure.

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  15. A tank 4m x 3m x 2m containing an oil of specific gravity 0.83 is moved with an acceleration g/2 m sec2. The ratio of the pressures at its bottom when it is moving vertically up and down, is

  16. A.

    2

    B.

    3

    C.

    1/2

    D.

    1/3

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  17. The most familiar form of Bernoulli's equation, is

  18. A.

    \(\frac { P1 } { w } \)+z1 +\(\frac { V1^2 } { 2g }\)+\(\frac { P2 } { w } \)+z2+\(\frac { V2^2 } { 2g }\)

    B.

    \( \frac { d\rho } {\rho}\)+g.dz+vdv = 0

    C.

    \( \frac { p } { w } \)+z +\(\frac { V^2 } { 2g }\)]any section = constant head 

    D.

    none of these.

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  19. Highest dam in India, is

  20. A.

    Bhakra dam

    B.

    Hirakund dam

    C.

    Nagarjuna Sagar dam

    D.

    Iddiki dam.

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