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Process Control and Instrumentation problems


  • 1. Use of I-control along with P-control facilitates

  • Options
  • A. elimination of offset
  • B. reduction of offset
  • C. reduction of stability time
  • D. none of these
  • Discuss
  • 2. The transfer function for a first order process with time delay is

  • Options
  • A.
  • B.
  • C.
  • D.
  • Discuss
  • 3. Liquid discharge from a tank or reservoir can not be measured by

  • Options
  • A. orificemeters
  • B. weirs
  • C. mouthpieces
  • D. notches
  • Discuss
  • 4. The frequency response of a dynamic element shows a constant magnitude ratio at all frequencies. The element exhibits a negative phase shift at all frequencies. The absolute value of the phase shift increases linearly with frequency. The element has the transfer function

  • Options
  • A. e-?s
  • B.
  • C.
  • D.
  • Discuss
  • 5. A mercury barometer measures the __________ pressure.

  • Options
  • A. atmospheric
  • B. gauge
  • C. vacuum
  • D. absolute
  • Discuss
  • 6. __________ are analysed using a polarograph.

  • Options
  • A. Isotonic solutions
  • B. Solids
  • C. Liquids
  • D. Gases
  • Discuss
  • 7. Measurement of sub-zero Celcius temperature in industry is done most commonly by

  • Options
  • A. thermocouples
  • B. resistance thermometers
  • C. gas thermometers
  • D. bi-metallic thermometers
  • Discuss
  • 8. Which of the following is not a mechanical pressure sensing element?

  • Options
  • A. Bellows
  • B. Diaphragm
  • C. Bourdon tube
  • D. U-tube
  • Discuss
  • 9. Pirani gauge is used for the measurement of

  • Options
  • A. very high pressure.
  • B. high vacuum.
  • C. liquid level under pressure.
  • D. liquid level at atmospheric pressure
  • Discuss
  • 10. Transfer functions X/Y for which of the following block diagrams is Chemical Engineering Process Control and Instrumentation: Transfer functions X/Y for which of the following block diagrams is

  • Options
  • A.
  • B.
  • C.
  • D. none of these
  • Discuss

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