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

  • When the Mach number is more than 6, the flow is called


  • Options
  • A. sub-sonic flow
  • B. sonic flow
  • C. super-sonic flow
  • D. hyper-sonic flow

  • Correct Answer
  • hyper-sonic flow 

    • Hydraulics and Fluid Mechanics problems

    Search Results

    • 1. The total pressure on the bottom of a closed cylindrical vessel completely filled up with a liquid is the sum of the total centrifugal pressure and the weight of the liquid in the vessel.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 2. The specific gravity of water is taken as

    • Options
    • A. 0.001
    • B. 0.01
    • C. 0.1
    • D. 1
      • Discuss
    • 3. A moving fluid mass may be brought to a static equilibrium position, by aplying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called

    • Options
    • A. Pascal's law
    • B. Archimede's principle
    • C. D-Alembert's principle
    • D. none of these
      • Discuss
    • 4. The velocity of liquid flowing through an orifice varies with the available head of the liquid.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 5. The force of buoyancy is always __________ the weight of the liquid displaced by the body.

    • Options
    • A. equal to
    • B. less than
    • C. more than
      • Discuss
    • 6. When the Mach number is equal to unity, the flow is called sonic flow.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. Poise is the unit of viscosity in C.G.S. system of units.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 8. The reciprocal of Euler's number is called Newton number.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 9. When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called

    • Options
    • A. Pascal's law
    • B. Archimede's principle
    • C. principle of floatation
    • D. Bernoulli's theorem
      • Discuss
    • 10. The unit of surface tension is

    • Options
    • A. N/m
    • B. N/m2
    • C. N/m3
    • D. N-m
      • Discuss

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