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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

  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°

  5. __________ stability method uses open loop transfer function.

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

  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.

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

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

  11. The transfer function of a first order system is

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

  13. Composition of alloys can be determined by

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

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

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

  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

  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