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Mechanical Engineering :: Thermodynamics

  1. Hydrogen is the __________ substance.

  2. A.

    lightest

    B.

    heaviest


  3. Otto cycle is also known as

  4. A.

    constant pressure cycle

    B.

    constant volume cycle

    C.

    constant temperature cycle

    D.

    constant temperature and pressure cycle


  5. For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)

  6. A.

    p v = constant, if T is kept constant

    B.

    v/T = constant, if p is kept constant

    C.

    p/T = constant, if v is kept constant

    D.

    T/p = constant, if v is kept constant


  7. Producer gas is obtained by

  8. A.

    partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

    B.

    carbonisation of bituminous coal

    C.

    passing steam over incandescent coke

    D.

    passing air and a large amount of steam over waste coal at about 650°C


  9. The efficiency of a dual combustion cycle __________ upon cut-off ratio.

  10. A.

    depends

    B.

    does not depend