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Mechanical Engineering :: Thermodynamics

  1. To ensure complete and rapid combustion of a fuel, some quantity of air, in excess of the theoretical or minimum air is supplied.

  2. A.

    Yes

    B.

    No

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  3. According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) __________ with the change in pressure and temperature of the gas.

  4. A.

    change

    B.

    do not change

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  5. One molecule of oxygen is __________ times heavier than the hydrogen atom.

  6. A.

    12

    B.

    14

    C.

    16

    D.

    32

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  7. Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant)

  8. A.

    \(\frac { C_v } { C_p } = R\)

    B.

    cp - cv = R

    C.

    \(C_v = \frac{R}{(Y-1)}\)

    D.

    Both (B) and (C)

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  9. The heat and work are mutually convertible. This statement is called __________ law of thermodynamics.

  10. A.

    Zeroth

    B.

    First

    C.

    Second

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