Thermodynamics Quiz for Fun and Quiz Competition Practice 4

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#1. Efficiency of a perfectly reversible heat engine operating between absolute temperatures T and zero is equal to ______.

#2. A reversible heat engine can have 100% efficiency if the temperature of the sink is ______.

#3. For an infinitesimal process,

#4. In a heat engine, the maximum heat that can be converted into mechanical work

#5. The efficiency of a heat engine working between heat reservoirs at temperature 327 oC and 27 oC respectively is

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Thermodynamics Quiz Answers 4

  1. Efficiency of a perfectly reversible heat engine
    operating between absolute temperatures T and
    zero is equal to __.
    a. 0
    b. 0.5
    c. Infinity
    d. None of the above()
  2. A reversible heat engine can have 100% efficiency
    if the temperature of the sink is __.
    a. Less than that of source
    b. 0 K
    c. 0
    oC
    d. Equal to that of source
  3. For an infinitesimal process,
    a. dU = dq – dW
    b. dq = dU + dW
    c. dU= dW – dq
    d. dU= dq + dW()
  4. In a heat engine, the maximum heat that can be
    converted into mechanical work
    a. depends upon friction()
    b. depends upon working temperatures
    c. is 100%
    d. depends upon the working
  5. The efficiency of a heat engine working between
    heat reservoirs at temperature 327
    oC and 27
    oC
    respectively is
    a. 25%
    b. 50%()
    c. 75%
    d. 100%
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