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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The specific gravity of an oil whose specific weight is 7.85 kN/m3, is

  2. A.

    0.8

    B.

    1

    C.

    1.2

    D.

    1.6


  3. The specific gravity of water is taken as

  4. A.

    0.001

    B.

    0.01

    C.

    0.1

    D.

    1


  5. The body will float if the force of buoyancy is __________ the weight of the liquid displaced.

  6. A.

    equal to

    B.

    less than

    C.

    more than


  7. According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)

  8. A.

    \(\frac { f /v^2} { 2gd }\)

    B.

    \(\frac { f /v^2} { gd }\)

    C.

    \(\frac { 3f /v^2} { 2gd }\)

    D.

    \(\frac { 4 f /v^2} { 2gd }\)


  9. The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called

  10. A.

    density of liquid

    B.

    specific gravity of liquid

    C.

    compressibility of liquid

    D.

    surface tension of liquid