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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. A pipe of 0.1 m2 cross sectional area suddenly enlarges to 0.3 m2 cross-sectional area. If the discharge of the pipe is 0.3 m3 /sec, the head loss is

    2. A.

    2/g m of water
    B.

    g/2 m of water
    C.

    1g m of water
    D.

    \(\sqrt{g}\)m of water.

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  2. Maximum efficiency of transmission of power through a pipe, is

    3. A.

    25%
    B.

    33.3%
    C.

    50%
    D.

    66.67%.

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  3. An ideal flow of a liquid obeys

    4. A.

    Continuity equation
    B.
    Newton's law of viscosity
    C.

    Newton's second law of motion
    D.

    dynamic viscosity law,

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  4. Euler's equation for motion of liquids, is given by
    5. A.

    \(\frac { d\rho } { \rho} \) - gdz +vdv= 0
    B.

    \(\frac { d\rho } { \rho} \)+ dgz- vdv=0
    C.

    \(\frac { d\rho } { \rho} \)+gdz+vdv =0
    D.

    ρdp + gdz + vdv = 0

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  5. Reynold number is the ratio of initial force and

    6. A.

    viscosity
    B.

    elasticity
    C.

    gravitational force
    D.

    surface tension.

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  6. When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal to

    7. A.

    weight of the body
    B.

    weight of the fluid displaced by the body
    C.

    weight of the body and fluild displaced by the body
    D.

    difference of weights of the fluid displaced and that of the body
    E.

    none of these.

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  7.  

    If D is the diameter of a pipe of length L and f is the coefficient of friction of pipe then diameter of the nozzle d is
    8. A.

    \([\frac { D^5 } { 8fL } ]^1/4\)
    B.

    \([\frac { D^5 } { 8fL } ]^1/3\)
    C.

    \([\frac { D^5 } { 8fL } ]^1/2\)
    D.

    none of these.

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  8. If the total head of the nozzle of a pipe is 37.5 m and discharge is 1 cumec, the power generated is
    9. A.

    400 H.P.
    B.

    450 H.P.
    C.

    500 H.P.
    D.
    550 H.P.

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  9. The phenomenon occuring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream causing a distinct rise of liquid surface, is

    10. A.

    water hammer
    B.

    hydraulic jump
    C.

    critical discharge
    D.

    none of these.

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  10. In a circular pipe of length L and diameter d, a viscous liquid is flowing with a velocity v. The loss in head, is
    11. A.

    \( \frac { 16 } { Re } \) x \(\frac { 4L} { d } \) x \(\frac { V^2 } { 2g } \)
    B.

    \( \frac { 16 } { Re } \) x \(\frac { L} { d } \) x \(\frac { V^2 } { 2g } \)
    C.

    Re \(\frac { L^2 } { d } \) x \(\frac { V } { 2g } \)
    D.

    \(\frac { ReL } { g^2 } \) x \(\frac { V^2 } { 2g } \)
    E.

    none of these.

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