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

  • Flapper nozzle is used in a/an __________ controller.


  • Options
  • A. electronic
  • B. hydraulic
  • C. pneumatic
  • D. none of these

  • Correct Answer
  • pneumatic 

    • Process Control and Instrumentation problems

    Search Results

    • 1. Transfer function of transportation lag is

    • Options
    • A. eTS
    • B. e-TS
    • C.
    • D. none of these
      • Discuss
    • 2. 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
    • 3. 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
    • 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. 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
    • 6. 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
    • 7. 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
    • 8. Load cells are used for the measurement of

    • Options
    • A. stress
    • B. weight
    • C. strain
    • D. velocity
      • Discuss
    • 9. The symbol for "capillary line" in instrumentation diagram is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. The __________ of a vapor pressure thermometer is a functioning element.

    • Options
    • A. pointer
    • B. bourdon tube
    • C. bulb
    • D. none of these
      • Discuss

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