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Home Chemical Engineering Process Control and Instrumentation Comments

  • Question
  • __________ is an example of distributed parameter system


  • Options
  • A. Tubular reactor
  • B. CSTR
  • C. On-off controller
  • D. none of these

  • Correct Answer
  • Tubular reactor 


  • Process Control and Instrumentation problems


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    • 1. Which of the following is never used as an element of industrial resistance thermometer?

    • Options
    • A. Lead
    • B. Nickel
    • C. Copper
    • D. 30% iron + 70% nickel
    • Discuss
    • 2. Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called

    • Options
    • A. dielectrics
    • B. insulators
    • C. semi conductors
    • D. conductors
    • Discuss
    • 3. Compositional analysis of flue gas coming out of a furnace in respect of O2 and CO2% can be continuously done by a/an

    • Options
    • A. orsat apparatus
    • B. thermal conductivity cell
    • C. zirconia probe
    • D. chromatograph
    • Discuss
    • 4. When the damping co-efficient (?) is unity, the system is

    • Options
    • A. Overdamped.
    • B. Critically damped.
    • C. Underdamped.
    • D. Highly fluctuating.
    • Discuss
    • 5. Which is the symbol for "pneumatic control valve"?

    • Options
    • A.
    • B.
    • C.
    • D. none of these
    • Discuss
    • 6. "An emf of the order of mV is generated when two solutions of different hydrogen ion concentration are separated by a thin glass wall". This is the working principle of a

    • Options
    • A. pH meter
    • B. polarimeter
    • C. chromatograph
    • D. polarograph
    • Discuss
    • 7. Silver point temperature is __________ °C.

    • Options
    • A. 760.5
    • B. 860.5
    • C. 960.5
    • D. 1060.5
    • Discuss
    • 8. Platinum resistance thermometer can be used upto antimony point which is __________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure.

    • Options
    • A. 961.93
    • B. 630.74
    • C. 1064.43
    • D. 1261.93
    • Discuss
    • 9. Block diagram of a simple standard control system is shown below in the figure.

      Which of the following statement about the above control system is wrong?

    • Options
    • A. The transfer functions of the measuring element and the process is represent by H and G2 respectively
    • B. The overall transfer function for the change in load (X = 0) is given by
    • C. The overall transfer function for the change in set point (X1 = 0) is given by
    • D. Manipulated variable is represented by C.
    • Discuss
    • 10. Bimetal strips are not used in

    • Options
    • A. bimetallic thermometers.
    • B. thermocouples.
    • C. thermostats.
    • D. relays for opening & closing of electrical circuits.
    • Discuss


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