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Mechanical Engineering :: Thermodynamics

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Thermodynamics - Section 4
Thermodynamics - Section 5
Thermodynamics - Section 6
Thermodynamics - Section 7
Thermodynamics - section-8
  1. The efficiency of the Carnot cycle may be increased by

    2. A.

     Increasing the highest temperature
    B.

     Decreasing the highest temperature
    C.

     Increasing the lowest temperature
    D.

     Keeping the lowest temperature constant

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  2. Carnot cycle efficiency is maximum when

    3. A.

     Initial temperature is 0°K
    B.

     Final temperature is 0°K
    C.

     Difference between initial and final temperature is 0°K
    D.

     Final temperature is 0°C

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  3. The efficiency of Diesel cycle depends upon

    4. A.

     Pressure ratio
    B.

     Cut-off ratio and compression ratio
    C.

     Temperature limits
    D.

     Compression ratio

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  4. The work ratio of simple gas turbine cycle depends upon

    5. A.

     Maximum cycle temperature
    B.

     Minimum cycle temperature
    C.

     Pressure ratio
    D.

     All of these

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  5. The efficiency of Carnot cycle depends upon

    6. A.

     Temperature limits
    B.

     Volume compression ratio
    C.

     Cut-off ratio and compression ratio
    D.

     Pressure ratio

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  6. One kg of hydrogen requires 8 kg of oxygen and produces

    7. A.

     1 kg of water
    B.

     7 kg of water
    C.

     8 kg of water
    D.

     9 kg of water

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  7. One kg of carbon monoxide requires 4/7 kg of oxygen and produces

    8. A.

     11/3 kg of carbon dioxide gas
    B.

     7/3 kg of carbon monoxide gas
    C.

     11/7 kg of carbon dioxide gas
    D.

     8/3 kg of carbon monoxide gas

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