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Home Chemical Engineering Process Control and Instrumentation Comments

  • Question
  • A magnetic flowmeter is


  • Options
  • A. based on the principle of Faraday's law.
  • B. capable of measuring the flow rate of slurries and electrolytes.
  • C. based on the linear relationship between the fluid flow rate and the induced voltage.
  • D. all (a), (b) and (c).

  • Correct Answer
  • all (a), (b) and (c). 


  • Process Control and Instrumentation problems


    Search Results


    • 1. Working principle of radiation pyrometer is based on the

    • Options
    • A. Wien's law
    • B. Kirchoffs law
    • C. Stafan-Boltzman law
    • D. Seebeck effect
    • Discuss
    • 2. The closed loop pole of a stable second order system could be

    • Options
    • A. both real and positive.
    • B. complex conjugate with positive real parts.
    • C. both real and negative.
    • D. one real positive and the other real negative.
    • Discuss
    • 3. Pick out the wrong statement.

    • Options
    • A. O2, NO and NO2 exhibit paramagnetic properties as a result of unpaired electrons.
    • B. CO2 is the strongest paramagnetic gas.
    • C. Paramagnetic susceptibility of gases decreases with temperature.
    • D. Paramagnetic susceptibility of gases permits the measurement of their concentration.
    • Discuss
    • 4. The __________ of a vapor pressure thermometer is a secondary element.

    • Options
    • A. pointer
    • B. Bourdon tube
    • C. bulb
    • D. none ofthese
    • Discuss
    • 5. The transfer function for a PID controller is (where, ? i is the integral (reset) time and ?D is the derivative time.)

    • Options
    • A. Kc(1 + ?is + ?D ). s
    • B.
    • C.
    • D.
    • Discuss
    • 6. In a single tank system, the transfer function of level to inlet flow rate is

    • Options
    • A. R/TS
    • B. R/(TS + 1)
    • C. l(TS + l)
    • D. 1/TS
    • Discuss
    • 7. Volumetric expansion is the working principle of the __________ thermometers.

    • Options
    • A. mercury in glass
    • B. constant volume gas
    • C. vapor pressure
    • D. bimetallic
    • Discuss
    • 8. Nichol's chart deals with

    • Options
    • A. A.R. vs. phase lag of first order.
    • B. A.R. vs. phase lag of second order.
    • C. closed loop values vs. open loop values.
    • D. frequency response values of controllers.
    • Discuss
    • 9. Compositional analysis of __________ is done using mass spectrometer.

    • Options
    • A. an isotope
    • B. natural gas
    • C. a solid
    • D. an alloy
    • Discuss
    • 10. The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.

    • Options
    • A. 250
    • B. 500
    • C. 750
    • D. 1000
    • Discuss


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