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Home ‣ Mechanical Engineering ‣ Hydraulics and Fluid Mechanics Comments
  • Question

  • The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number.


  • Options
  • A. Yes
  • B. No

  • Correct Answer
  • Yes 

    • Hydraulics and Fluid Mechanics problems

    Search Results

    • 1. Re-entrant or Borda's mouthpiece is an __________ mouthpiece.

    • Options
    • A. internal
    • B. external
      • Discuss
    • 2. When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid

    • Options
    • A. remains horizontal
    • B. becomes curved
    • C. falls on the front end
    • D. falls on the back end
      • Discuss
    • 3. The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 4. The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. Euler's number is the ratio of __________ force to pressure force.

    • Options
    • A. inertia
    • B. gravity
    • C. viscous
      • Discuss
    • 6. The specific weight of water in S.I. units is taken as

    • Options
    • A. 9.81 kN/m3
    • B. 9.81 x 103 kN/m3
    • C. 9.81 x 10-6 N/mm3
    • D. any one of these
      • Discuss
    • 7. The density of air is same at different heights.

    • Options
    • A. Correct.
    • B. Incorrect
      • Discuss
    • 8. The ratio of the inertia force to the surface tension force is called Weber's number.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 9. The rise, in water level, which occurs during the transformation of the unstable shooting flow to the stable streaming flow is called hydraulic jump.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 10. If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, The body is said to be in __________ equilibrium.

    • Options
    • A. neutral
    • B. stable
    • C. unstable
      • Discuss

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