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Home ‣ Chemical Engineering ‣ Process Control and Instrumentation Comments
  • Question

  • 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

  • Correct Answer
  • Lead 

    • Process Control and Instrumentation problems

    Search Results

    • 1. 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
    • 2. 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
    • 3. When the damping co-efficient (?) is unity, the system is

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

    • Options
    • A.
    • B.
    • C.
    • D. none of these
      • Discuss
    • 5. The term analogous to voltage in a single tank system is the

    • Options
    • A. heat content of the system.
    • B. liquid volume in the tank.
    • C. flow rate.
    • D. level of liquid.
      • Discuss
    • 6. __________ is an example of distributed parameter system

    • Options
    • A. Tubular reactor
    • B. CSTR
    • C. On-off controller
    • D. none of these
      • Discuss
    • 7. "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
    • 8. Silver point temperature is __________ °C.

    • Options
    • A. 760.5
    • B. 860.5
    • C. 960.5
    • D. 1060.5
      • Discuss
    • 9. 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
    • 10. 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

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