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

  • The specific weight of compressible fluids does not remain constant.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • Hydraulics and Fluid Mechanics problems

    Search Results

    • 1. The specific weight is also known as weight density.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 2. When the venturimeter is inclined, then for a given flow it will show __________ reading.

    • Options
    • A. same
    • B. more
    • C. less
      • Discuss
    • 3. A flow is called super-sonic if the

    • Options
    • A. velocity of flow is very high
    • B. discharge is difficult to measure
    • C. Mach number is between 1and 6
    • D. none of these
      • Discuss
    • 4. In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

    • Options
    • A. surface tension
    • B. compressibility
    • C. capillarity
    • D. viscosity
      • Discuss
    • 6. The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.

    • Options
    • A. plus
    • B. minus
      • Discuss
    • 7. A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.

    • Options
    • A. steady
    • B. streamline
    • C. turbulent
    • D. unsteady
      • Discuss
    • 8. Venturimeter is used to

    • Options
    • A. measure the velocity of a flowing liquid
    • B. measure the pressure of a flowing liquid
    • C. measure the discharge of liquid flowing in a pipe
    • D. measure the pressure difference of liquid flowing between two points in a pipe line
      • Discuss
    • 9. According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

    • Options
    • A. Cd(L - nH)2gH
    • B. Cd(L - 0.1nH)2gH3/2
    • C. Cd(L - nH)2gH2
    • D. Cd(L - 0.2nH)2gH5/2
      • Discuss
    • 10. The dynamic viscosity of gases __________ with rise in temperature.

    • Options
    • A. remain unaffected
    • B. increases
    • C. decreases
      • Discuss

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