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  • Question

  • When gas is heated at constant pressure, the heat supplied is utilised in


  • Options
  • A. increasing the internal energy of gas
  • B. doing some external work
  • C. increasing the internal energy of gas and also for doing some external work
  • D. none of the above

  • Correct Answer
  • increasing the internal energy of gas and also for doing some external work 

    • Thermodynamics problems

    Search Results

    • 1. It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 2. The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and ? = Ratio of specific heats)

    • Options
    • A. 1 - r? - 1
    • B. 1 + r? - 1
    • C.
    • D.
      • Discuss
    • 3. First law of thermodynamics deals with

    • Options
    • A. conservation of heat
    • B. conservation of momentum
    • C. conservation of mass
    • D. conservation of energy
      • Discuss
    • 4. The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

    • Options
    • A. 0.086
    • B. 1.086
    • C. 3.086
    • D. 4.086
      • Discuss
    • 5. A close cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.

    • Options
    • A. same
    • B. lower
    • C. higher
      • Discuss
    • 6. Both the Ericsson and Joule's cycle have two constant pressure processes.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. The atomic mass of sulphur is

    • Options
    • A. 12
    • B. 14
    • C. 16
    • D. 32
      • Discuss
    • 8. When the gas is heated at constant pressure, the heat supplied

    • Options
    • A. increases the internal energy of the gas
    • B. increases the temperature of the gas
    • C. does some external work during expansion
    • D. Both (B) and (C)
      • Discuss
    • 9. It is __________ to make an engine working on a Carnot cycle.

    • Options
    • A. possible
    • B. impossible
      • Discuss
    • 10. If the carbon content in the bituminous coal is 78 to 81%, it is said to be coking bituminous coal.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss

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