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Home Mechanical Engineering Thermodynamics Comments

  • Question
  • The free expansion process is __________ non-flow process.


  • Options
  • A. reversible
  • B. irreversible

  • Correct Answer
  • irreversible 


  • Thermodynamics problems


    Search Results


    • 1. Liquid fuels consist of hydrocarbons.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. The thermodynamic property of a system is said to be an intensive property whose value for the entire system __________ the sum of their value for the individual parts of the system.

    • Options
    • A. is equal to
    • B. is not equal to
    • Discuss
    • 3. The compression ratio for Diesel engines is

    • Options
    • A. 3 to 6
    • B. 5 to 8
    • C. 15 to 20
    • D. 20 to 30
    • Discuss
    • 4. The measurement of a thermodynamic property known as temperature is based on

    • Options
    • A. Zeroth law of thermodynamics
    • B. First law of thermodynamics
    • C. Second law of thermodynamics
    • D. none of these
    • Discuss
    • 5. In an isothermal process,

    • Options
    • A. there is no change in temperature
    • B. there is no change in enthalpy
    • C. there is no change in internal energy
    • D. all of these
    • Discuss
    • 6. The specific heat at constant volume is

    • Options
    • A. the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant pressure
    • B. the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant volume
    • C. the amount of heat required to raise the temperature of 1 kg of water through one degree
    • D. any one of the above
    • Discuss
    • 7. The heating and expanding of a gas is called thermodynamic system.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 8. The total energy of a molecule is shared equally by the various degrees of freedom possessed by it. This law is known as

    • Options
    • A. law of equipartition of energy
    • B. law of conservation of energy
    • C. law of degradation of energy
    • D. none of these
    • Discuss
    • 9. Otto cycle is also known as

    • Options
    • A. constant pressure cycle
    • B. constant volume cycle
    • C. constant temperature cycle
    • D. constant temperature and pressure cycle
    • Discuss
    • 10. The heat absorbed during a polytropic process is

    • Options
    • A. x Workdone
    • B.
    • C.
    • D. all of these
    • Discuss


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