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  1. Which of the following is the most suitable for removing fine particles (< 1 micron diameter) from air below its dew point ?

  2. A.
    Venturi scrubber
    B.
    Electrostatic precipitator
    C.
    Cyclone separator
    D.
    Fabric filter

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  3. Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?

  4. A.
    Critical temperature.
    B.
    Recrystallisation temperature.
    C.
    Phase transformation temperature.
    D.
    Transition temperature.

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  5. Puddling process is used for converting pig iron into

  6. A.
    cast iron
    B.
    wrought iron
    C.
    mild steel
    D.
    semi-steel

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  7. Addition of __________ in steel can help in increasing the depth of hardness.

  8. A.
    nickel
    B.
    chromium
    C.
    vanadium
    D.
    tungsten

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  9. On-off control

  10. A.
    fully opens the final control element, when the measured variable is below the set point.
    B.
    fully closes the final control element, when the measured variable is above the set point.
    C.
    is a two position control (fully open or fully closed) control adequate to control a process with slow reaction and minimum dead time or transfer lag.
    D.
    none of these.

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  11. The tensile load-elongation curve of a metal does not describe

  12. A.
    work hardening
    B.
    yield stress
    C.
    anisotropy index
    D.
    necking strain

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  13. Usual value of the resistance suitable for a wire resistance strain gauge is __________ ohms.

  14. A.
    20
    B.
    80
    C.
    120
    D.
    500

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  15. Permanent set in a material is produced by subjecting it to

  16. A.
    triaxial loading.
    B.
    fatigue loading.
    C.
    stresses beyond the elastic limit.
    D.
    tensile & compressive loads simultaneously.

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  17. The following is a typical anionic collector used in flotation.

  18. A.
    Ethyl dixanthogen.
    B.
    Trimethyl cetyl ammonium bromide.
    C.
    Potassium ethyl xanthate.
    D.
    lAuryl amine hydrochloride.

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