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Process Control and Instrumentation problems

  • 1. Thermal conductivity measurement com-prises the working principle of a

  • Options
  • A. CO2 analyser
  • B. polarimeter
  • C. spectrometer
  • D. chromatograph
    • Discuss
  • 2. Which of the following is the dynamic characteristics of an instrument?

  • Options
  • A. Reproducibility
  • B. Sensitivity
  • C. Dead zone
  • D. Fidelity
    • Discuss
  • 3. The second order system with the transfer function Chemical Engineering Process Control and Instrumentation: The second order system with the transfer function has a damping ratio of

  • Options
  • A. 2.0
  • B. 0.5
  • C. 1.0
  • D. 4.0
    • Discuss
  • 4. Response of a system to a sinusoidal input is called __________ response.

  • Options
  • A. impluse
  • B. unit step
  • C. frequency
  • D. none of these
    • Discuss
  • 5. Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a

  • Options
  • A. thermocouple
  • B. reistance thermometer
  • C. mercury in glass thermometer
  • D. vapor pressure thermometer
    • Discuss
  • 6. Strain gage pressure transducers are used to measure __________ pressures.

  • Options
  • A. gage as well as vacuum
  • B. absolute as well as differential
  • C. both (a) and (b)
  • D. neither (a) nor (b)
    • Discuss
  • 7. Transfer function of transportation lag is

  • Options
  • A. eTS
  • B. e-TS
  • C.
  • D. none of these
    • Discuss
  • 8. Flapper nozzle is used in a/an __________ controller.

  • Options
  • A. electronic
  • B. hydraulic
  • C. pneumatic
  • D. none of these
    • Discuss
  • 9. Which of the following temperature measuring instruments need not touch the object whose temperature is being measured?

  • Options
  • A. Radiation/infrared pyrometer
  • B. Filled system thermometer
  • C. Mercury in glass thermometer
  • D. Thermo electric pyrometer
    • Discuss
  • 10. Select the correct statement from the following.

  • Options
  • A. The frequency response of a pure capacity process is unbounded.
  • B. The phase lag of a pure time delay system decreases with increasing frequency.
  • C. The amplitude ratio of a pure capacity process is inversely proportional to frequency.
  • D. The amplitude ratio of a pure time delay system increases with frequency.
    • Discuss

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