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Chemical Engineering :: Process Control and Instrumentation

  1. Change of angle of refraction with composition comprises the working principle of a

  2. A.
    polarimeter
    B.
    polarograph
    C.
    spectrometer
    D.
    refractrometer

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  3. Which of the following instruments is not used for measuring sub-zero (<0°) temperatures ?

  4. A.
    Platinum resistance thermometer
    B.
    Mercury in glass thermometer
    C.
    Vapor pressure thermometer
    D.
    Radiation pyrometer

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  5. Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 - 1600°C ?

  6. A.
    Optical pyrometer
    B.
    Radiation pyrometer
    C.
    Photoelectric pyrometer
    D.
    Thermocouples

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  7. Find the Laplace transform of the following input function shown in figure.

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  9. Flame photometry is used for the determination of compositional analysis of

  10. A.
    solids
    B.
    alkali metals
    C.
    natural gas
    D.
    isotopes

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  11. Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively

  12. A.
    - 273° & 80°
    B.
    0° & 80°
    C.
    32° & 460°
    D.
    32° & 80°

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  13. Which of the following is not a composition measuring instrument ?

  14. A.
    Thermal conductivity cell
    B.
    Mass spectrometer
    C.
    Polarograph
    D.
    Hot wire anemometer

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  15. Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is

  16. A.
    chromel-alumel
    B.
    iron-constantan
    C.
    platinum-platinum+rhodium
    D.
    none of these.

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  17. Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature ?

  18. A.
    Chromel-alumel
    B.
    Iron-constantan
    C.
    Platinum-platinum + rhodium
    D.
    Copper-constantan

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  19. Platinum resistance thermometer is the international standard for temperature measurement between

  20. A.
    triple point of hydrogen and freezing point of antimony
    B.
    13.81°K to 903.9°K
    C.
    both (a) and (b)
    D.
    neither (a) nor (b)

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