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  1. Gas turbine normally employs a constant __________ cycle.

  2. A.
    pressure
    B.
    temperature
    C.
    volume
    D.
    none of these

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  3. Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio) ?

  4. A.
    E = 2G (1 + v)
    B.
    E = G (1 + v)
    C.
    E = G (1 + v)/2
    D.
    E = 2G (1 + 2v)

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  5. Electrostatic separation of minerals from each other is based on their differences in the following property.

  6. A.
    Densities.
    B.
    Magnetic permeabilities.
    C.
    Electrical conductivities.
    D.
    Hardness.

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  7. Natural water contains approximately __________ percent of heavy water.

  8. A.
    0.015
    B.
    0.71
    C.
    1.2
    D.
    3.5

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  9. The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.

  10. A.
    ambient
    B.
    dry bulb
    C.
    dew point
    D.
    wet bulb

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  11. The order of a chemical reaction

  12. A.
    can be determined only experimentally
    B.
    can be determined from the stoichiometry of the reaction.
    C.
    can not be zero.
    D.
    can be fractional.

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  13. Pick out the wrong statement.

  14. A.
    Lead can creep under its own weight at room temperature.
    B.
    The electrical conductivity of gold is considerably reduced by alloying additions due to the decrease in electron movement.
    C.
    Recrystallisation temperature decreases with decrease in strain in a cold worked metal.
    D.
    With increase in temperature, the electrical conductivity of intrinsic semi-conductor will increase.

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  15. Pick out the wrong statement.

  16. A.
    Reflectivity of gases is very low.
    B.
    Absorptivity for metals is very high.
    C.
    Reflectivity for non-conducting materials is low.
    D.
    Reflectivity of polished surfaces is very high.

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  17. For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be

  18. A.
    100% indirect reduction.
    B.
    100% direct reduction.
    C.
    50-60% indirect reduction.
    D.
    30-40% indirect reduction.

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  19. Identify the false statement

  20. A.
    Martensitic steels are less susceptible to pitting corrosion than austenitic steels.
    B.
    Pitting corrosion is usually very localised.
    C.
    Hydrogen embrittlement is facilitated by tensile stress.
    D.
    Stress corrosion cracking is facilitated by tensile stress.

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