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Home ‣ Mechanical Engineering ‣ Heat Transfer, Refrigeration and Air Conditioning See What Others Are Saying!
  • Question

  • The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles due to difference of density caused by temperature of the particle is known as


  • Options
  • A. conduction
  • B. free convection
  • C. forced convection
  • D. radiation

  • Correct Answer
  • free convection 

    • More questions

    • 1. The amount by which the outer edge of the rail is raised, is known as super-elevation.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 2. Process layout is also known as

    • Options
    • A. analyticallayout
    • B. synthetic layout
    • C. static product layout
    • D. none of these
      • Discuss
    • 3. There is no change in internal energy in an isothermal process.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 4. Combustuion of fuel takes place __________ the engine cylinder of a steam engine.

    • Options
    • A. outside
    • B. inside
      • Discuss
    • 5. The neutral axis of the cross-section a beam is that axis at which the bending stress is

    • Options
    • A. zero
    • B. minimum
    • C. maximum
    • D. infinity
      • Discuss
    • 6. The refrigerant used in small-tonnage commercial machines (hermetically sealed units) is

    • Options
    • A. ammonia
    • B. carbon dioxide
    • C. sulphur dioxide
    • D. R-12
      • Discuss
    • 7. A centrifugal compressor is an axial flow compressor.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 8. Second law of thermodynamics defines

    • Options
    • A. heat
    • B. work
    • C. internal energy
    • D. entropy
      • Discuss
    • 9. An open structure of a grinding wheel is denoted by the number 1 to 8.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 10. The ratio of total useful heat drop to the total isentropic heat drop, is called

    • Options
    • A. stage efficiency
    • B. internal efficiency
    • C. Rankine efficiency
    • D. none of these
      • Discuss

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