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  • Question
  • In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be


  • Options
  • A. running full
  • B. running free
  • C. partially running full
  • D. partially running free

  • Correct Answer
  • running free 


  • Hydraulics and Fluid Mechanics problems


    Search Results


    • 1. The mass per unit volume of a liquid at a standard temperature and pressure is called

    • Options
    • A. specific weight
    • B. mass density
    • C. specific gravity
    • D. none of these
    • Discuss
    • 2. A body floating in a liquid is said to be in neutral equilibrium, if its metacentre

    • Options
    • A. coincides with its centre of gravity
    • B. lies above its centre of gravity
    • C. lies below its centre of gravity
    • D. lies between the centre of buoyancy and centre of gravity
    • Discuss
    • 3. The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid)

    • Options
    • A. wH/2
    • B. wH
    • C. wH2/2
    • D. wH2/4
    • Discuss
    • 4. The highest efficiency is obtained with a channel of __________ section.

    • Options
    • A. circular
    • B. square
    • C. rectangular
    • D. trapezoidal
    • Discuss
    • 5. The centre of pressure acts __________ the centre of gravity of immersed surface.

    • Options
    • A. at
    • B. above
    • C. below
    • Discuss
    • 6. The shear stress between the two liquid layers is __________ proportional to the distance between two layers.

    • Options
    • A. directly
    • B. indirectly
    • Discuss
    • 7. According to Kelvin-Planck's statement of second law of thermodynamics,

    • Options
    • A. it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
    • B. it is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
    • C. it is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body
    • D. none of the above
    • Discuss
    • 8. The area under the temperature-entropy curve (T - s curve) of any thermodynamic process represents

    • Options
    • A. heat absorbed
    • B. heat rejected
    • C. either (a) or (b)
    • D. none of these
    • Discuss
    • 9. For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)

    • Options
    • A. p v = constant, if T is kept constant
    • B. v/T = constant, if p is kept constant
    • C. p/T = constant, if v is kept constant
    • D. T/p = constant, if v is kept constant
    • Discuss
    • 10. According to Gay-Lussac law, the absolute pressure of a given mass of a perfect gas varies __________ as its absolute temperature, when the volume remains constant.

    • Options
    • A. directly
    • B. indirectly
    • Discuss


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