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Chemical Engineering :: Process Control and Instrumentation

  1. Mass spectrometer is used for the composition analysis of

  2. A.
    alloys
    B.
    solids
    C.
    isotopes
    D.
    none of these

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  3. A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is

  4. A.
    45°
    B.
    -90°
    C.
    -180°
    D.
    -45°

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  5. __________ stability method uses open loop transfer function.

  6. A.
    Nyquist
    B.
    Mikhalov
    C.
    Ruth
    D.
    none of these

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  7. A pyranometer is an instrument used for measuring the

  8. A.
    beam radiation.
    B.
    global radiation.
    C.
    bright sunshine period.
    D.
    none of these.

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  9. All the thermocouples used for temperature measurement use dissimilar metal

  10. A.
    strips
    B.
    bars
    C.
    wires
    D.
    beads

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  11. The transfer function of a first order system is

  12. A.
    B.
    C.
    D.
    none of these

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  13. Composition of alloys can be determined by

  14. A.
    polarograph
    B.
    chromatograph
    C.
    refractrometer
    D.
    none of these

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  15. Optical activity of a solution can be determined using a

  16. A.
    polarimeter
    B.
    polarograph
    C.
    dilatometer
    D.
    refractrometer

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  17. Stability of a control system containing a transportation lag can be best analysed by

  18. A.
    Routh test
    B.
    root locus methods
    C.
    frequency response methods
    D.
    none of these

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  19. Stabilising time for the controllers is the time required for the response to reach __________ percent of its ultimate value.

  20. A.
    63.2
    B.
    87.5
    C.
    95
    D.
    100

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