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Civil Engineering :: Hydraulics and Fluid Mechanics - Civil Engineering

  1. Flow at constant rate through a tapering pipe is
    i) steady flow
    ii) uniform flow
    iii) unsteady flow
    iv) non-uniform flow
    The correct answer is

  2. A.

     (i) and (ii)

    B.

     (i)and(iv)

    C.

     (ii) and (iii)

    D.

     (ii) and (iv)

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  3. Drag force is a function of
    i) projected area of the body
    ii) mass density of the fluid
    iii) velocity of the body
    The correct answer is

  4. A.

     (i) and (ii)

    B.

     (i) and (iii)

    C.

     (ii) and (iii)

    D.

     (i), (ii) and (iii)

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  5. The increase in meta centric height
    i) increases stability
    ii) decreases stability
    iii) increases comfort for passengers
    iv) decreases comfort for passengers
    The correct answer is

  6. A.

     (i) and (iii)

    B.

     (i) and (iv)

    C.

     (ii) and (iii)

    D.

     (ii) and (iv)

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  7. Select the correct statement

  8. A.

     Local atmospheric pressure depends upon elevation of locality only

    B.

     Standard atmospheric pressure is the mean local atmospheric pressure a* sea level

    C.

     Local atmospheric pressure is always below standard atmospheric pressure

    D.

     A barometer reads the difference be-tween local and standard atmospheric pressure

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  9. Least possible value of correction factor for
    i) kinetic energy is zero
    ii) kinetic energy is 1
    iii) momentum is zero
    iv) momentum is 1
    The correct statements are

  10. A.

     (i) and (iii)

    B.

     (ii) and (iii)

    C.

     (i) and (iv)

    D.

     (ii) and (iv)

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  11. Choose the wrong statement

  12. A.

     fluids are capable of flowing

    B.

     fluids conform to the shape of the con-taining vessels

    C.

     when in equilibrium, fluids cannot sustain tangential forces

    D.

     when in equilibrium, fluids can sustain shear forces

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  13. For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is

  14. A.

     directly proportional to Reynolds number and independent of pipe wall roughness

    B.

     directly proportional to pipe wall roughness and independent of Reynolds number

    C.

     inversely proportional to Reynolds number and indpendent of pipe wall roughness

    D.

     inversely proportional to Reynolds number and directly proportional to pipe wall roughness

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  15. The flow which neglects changes in a transverse direction is known as

  16. A.

     one dimensional flow

    B.

     uniform flow

    C.

     steady flow

    D.

     turbulent flow

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  17. For measuring flow by a venturimeter, if should be installed in

  18. A.

     vertical line

    B.

     horizontal line

    C.

     inclined line with upward flow

    D.

     in any direction and in any location.

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  19. Which of the following instrument can be used for measuring speed of an aeroplane

  20. A.

     Venturimeter

    B.

     Orifice plate

    C.

     rotameter

    D.

     pitot tube

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