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Home ‣ Mechanical Engineering ‣ Thermodynamics Comments
  • Question

  • In S. I. units, the value of the universal gas constant is


  • Options
  • A. 8.314 J/kg mole-K
  • B. 83.14 J/kgmole-K
  • C. 831.4 J/kgmole-K
  • D. 8314 J/kgmole-K

  • Correct Answer
  • 8314 J/kgmole-K 

    • Thermodynamics problems

    Search Results

    • 1. The atomic mass of nitrogen is __________ oxygen.

    • Options
    • A. equal to
    • B. less than
    • C. more than
      • Discuss
    • 2. In a reversible adiabatic process, the ratio of T1/T2 is equal to

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 3. The heat energy stored in the gas and used for raising the temperature of the gas is known as

    • Options
    • A. external energy
    • B. internal energy
    • C. kinetic energy
    • D. molecular energy
      • Discuss
    • 4. Petrol is distilled at

    • Options
    • A. 65° to 220°C
    • B. 220° to 345°C
    • C. 345° to 470°C
    • D. 470° to 550°C
      • Discuss
    • 5. The workdone in a free expansion process is zero.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. A cycle consisting of two constant pressure and two isentropic processes is known as

    • Options
    • A. Carnot cycle
    • B. Stirling cycle
    • C. Otto cycle
    • D. none of these
      • Discuss
    • 7. The value of one bar (in S. I. units) is equal to

    • Options
    • A. 1 x 102 N/m2
    • B. 1 x 103 N/m2
    • C. 1 x 104 N/m2
    • D. 1 x 105 N/m2
      • Discuss
    • 8. A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is

    • Options
    • A. -140 kJ
    • B. -80 kJ
    • C. -40 kJ
    • D. +60 kJ
      • Discuss
    • 9. The throttling process is __________ process.

    • Options
    • A. reversible
    • B. irreversible
    • C. reversible or irreversible
      • Discuss
    • 10. The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.

    • Options
    • A. Boyle's law
    • B. Charle's law
    • C. Gay-Lussac law
    • D. Joule's law
      • Discuss

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