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Week 4-5 - Energy Transformations, Efficiency, and PV Diagrams Capabilities

Usuario eliminado 10 preguntas Actualizado el 3 feb 2020

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Preguntas del test (10)

  1. 1What does the area inside a closed cycle on a PV Diagram tell us?
    1. AThe work done during the cycle
    2. BThe energy lost in one cycle
    3. CThe pressure and volume of a system
    4. DThe velocity of a cycle
  2. 2Which of the following processes are isothermal?Imagen de la pregunta 2
    1. Aab
    2. Bbc
    3. Ccd
    4. Dda
    5. ENone of the processes are isothermal
  3. 3Which of the following processes are isobaric?Imagen de la pregunta 3
    1. Aab
    2. Bbc
    3. Ccd
    4. Dda
    5. ENone of the processes are isobaric
  4. 4Which of the following processes are isochoric?Imagen de la pregunta 4
    1. Aab
    2. Bbc
    3. Ccd
    4. Dda
    5. ENone of the processes are isochoric
  5. 5What is the total change in energy for a closed cycle PV diagram?
    1. AAlways equal to zero
    2. BEqual to the work done by the system
    3. CEqual to the work done on the system
    4. DThe total area under the PV diagram curves
  6. 6We define thermal efficiency as:
    1. AThe ratio of heat input to work output
    2. BThe ratio of heat input to cold output
    3. CThe ratio of cold input to heat output
    4. DThe ratio of work done to cold output
  7. 7An automobile engine has an efficiency of 20% and produces an average of 23,000 J of mechanical work per second during operation. How much heat input is required?

    3 SF.

    E = [blank_start]115,000[blank_end] Joules
    1. A115,000
  8. 8An automobile engine has an efficiency of 20% and produces an average of 23,000 J of mechanical work per second during operation. How much heat is discharged as waste heat from this engine per second?

    2 SF.

    E = [blank_start]92,000[blank_end] Joules
    1. A92,000
  9. 9What is unique about a Carnot Cycle heat engine?
    1. AIt has no energy loss and is 100% efficient
    2. BIt has equal hot and cold work inputs
    3. CIt has double the heat input as cold output
    4. DIt has the maximum possible efficiency of 99%
  10. 101200 J of heat flowing spontaneously through a copper rod from a hot reservoir 650 K to a cold reservoir at 350 K. Determine
    the amount by which this irreversible process changes the entropy of the universe, assuming that no other changes occur.

    First blank is for the numeric value. The second blank is for the units, putting a space between all characters.

    s = [blank_start]1.6[blank_end] [blank_start]J / K[blank_end]
    1. A1.6
    2. BJ / K

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El usuario ha eliminado su información de asignaturas Test sobre Week 4-5 - Energy Transformations, Efficiency, and PV Diagrams Capabilities, creado por Usuario eliminado el 28/01/2020.
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Usuario eliminado
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Creado el 28 ene 2020 · actualizado el 3 feb 2020
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