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Home ‣ Mechanical Engineering ‣ Thermodynamics See What Others Are Saying!
  • Question

  • A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is


  • Options
  • A. 30 kJ
  • B. 54 kJ
  • C. 84 kJ
  • D. 114 kJ

  • Correct Answer
  • 54 kJ 

    • More questions

    • 1. The ability of a material to absorb energy in the plastic range is called

    • Options
    • A. resilience
    • B. creep
    • C. fatigue strength
    • D. toughness
      • Discuss
    • 2. Structural sections such as rails, angles, I-beams are made by

    • Options
    • A. hot rolling
    • B. hot drawing
    • C. hot piercing
    • D. hot extrusion
      • Discuss
    • 3. The absolute pressure is equal to

    • Options
    • A. gauge pressure + atmospheric pressure
    • B. gauge pressure - atmospheric pressure
    • C. atmospheric pressure - gauge pressure
    • D. gauge pressure - vacuum pressure
      • Discuss
    • 4. A compound steam engine requires a heavier flywheel than simple steam engines.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The discharge through a nozzle is maximum for a certain value of exit pressure. This pressure is known as critical pressure.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 6. The mechanical advantage of a lifting machine is the ratio of

    • Options
    • A. distance moved by effort to the distance moved by load
    • B. load lifted to the effort applied
    • C. output to the input
    • D. all of the above
      • Discuss
    • 7. The advantage of the fuel injection system over the carburetor system is

    • Options
    • A. improved fuel efficiency
    • B. improved emission
    • C. improved power output
    • D. all of these
      • Discuss
    • 8. A maintenance free battery

    • Options
    • A. has lead-antimony plate grid
    • B. has lead-calcium plate grid
    • C. does not contain acid
    • D. does not contain water
      • Discuss
    • 9. Drilling is an example of

    • Options
    • A. orthogonal cutting
    • B. oblique cutting
    • C. simple cutting
    • D. uniform cutting
      • Discuss
    • 10. Reactors for propulsion applications are designed for

    • Options
    • A. any form of uranium
    • B. natura uranium
    • C. enriched uranium
    • D. plutonium
      • Discuss

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