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  1. Addition of __________ to steel does not impart hardness.

  2. A.
    nickel
    B.
    copper
    C.
    chromium
    D.
    silicon

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  3. For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

  4. A.
    increases.
    B.
    decreases.
    C.
    remains constant.
    D.
    increases to a maximum before decreasing.

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  5. Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

  6. A.
    Mach
    B.
    Froude
    C.
    Reynolds
    D.
    Euler

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  7. Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.

  8. A.
    copper
    B.
    steel
    C.
    aluminium
    D.
    brass

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  9. Wavelength of radiation emitted by a body depends on the __________ of its surface.

  10. A.
    temperature
    B.
    area
    C.
    nature
    D.
    all 'a', 'b' & 'c'

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  11. Out of the following, which will fracture most readity, when hit with a hard hammer ?

  12. A.
    Brass
    B.
    Bronze
    C.
    German silver
    D.
    Cast iron

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  13. A pycnometer is used for the measurement of

  14. A.
    flow rate of molten metal.
    B.
    specific gravity of a liquid.
    C.
    composition of alloys.
    D.
    concentration of a solution.

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  15. For infinite parallel planes having emis-sivities ε1 & ε2, the interchange factor for radiation from surface 1 to surface 2 is given by

  16. A.
    1 + ε2)/ε12
    B.
    ε12/(ε1 + ε2 - ε12)
    C.
    ε12
    D.
    ε1 + ε2

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  17. Working of linear variable differential transducer (LVDT) is based on the principle of variable

  18. A.
    capacitance
    B.
    resistance
    C.
    mutual inductance
    D.
    none of these

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  19. A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?

  20. A.
    Steel
    B.
    Glass
    C.
    Rubber
    D.
    Brass

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