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Hydraulics and Fluid Mechanics - Civil Engineering - section-1
  1. The vapour pressure over the concave surface is

    2. A.

     less man the vapour pressure over the plane surface
    B.

     equal to the vapour pressure over the plane surface
    C.

     greater than the vapour pressure over the plane surface
    D.

     zero

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  2. The equation of continuity holds good when the flow

    3. A.

     is steady
    B.

     is one dimensional
    C.

     velocity is uniform at all the cross sec-tions
    D.

     all of the above

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  3. Pitot tube is used for measurement of

    4. A.

     pressure
    B.

     flow
    C.

     velocity
    D.

     dsscharge

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  4. Principle of similitude forms the basis of

    5. A.

     comparing two identical equipments
    B.

     designing models so that the result can be converted to prototypes
    C.

     comparing similarity between design and actual equipment
    D.

     hydraulic designs

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  5. Select the correct statement.

    6. A.

     The absolute roughness of a pipe de-creases with time
    B.

     A pipe becomes smooth after using for long time
    C.

     The friction factor decreases with time
    D.

     The absolute roughness increases with time

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  6. Select the incorrect statement.

    7. A.

     The pressure intensity at vena contracta is atmospheric
    B.

     Contraction is least at vena contracta
    C.

     Stream lines are parallel throughout the jet at vena contracta
    D.

     Coefficient of contraction is always less than one

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  7. Kinematic viscosity is equal to

    8. A.

     dynamic viscosity/density
    B.

     dynamicviscosity x density
    C.

     density/dynamic viscosity
    D.

     1/dynamicviscosity x density

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  8. The losses are more in

    9. A.

     laminar flow
    B.

     transition flow
    C.

     turbulent flow
    D.

     critical flow

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  9. Which of the following instrument can be used for measuring speed of a submarine moving in deep sea

    10. A.

     Venturimeter
    B.

     hot wire anemometer
    C.

     rotameter
    D.

     pitot tube

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  10. If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water

    11. A.

     51 cm
    B.

     50 cm
    C.

     52 cm
    D.

     52.2 cm

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