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Process Control and Instrumentation problems

  • 1. Routh test

  • Options
  • A. criterion provides information about the actual location of roots.
  • B. cannot be used to test the stability of a control system containing transportation lag.
  • C. criterion is not applicable to systems with polynomial characteristic equation.
  • D. can not determine as to how many roots of the characteristics equation have positive real roots.
    • Discuss
  • 2. Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic?

  • Options
  • A. CO2
  • B. O2
  • C. NO
  • D. NO2
    • Discuss
  • 3. Number of poles in a system with transfer function Chemical Engineering Process Control and Instrumentation: Number of poles in a system with transfer function is

  • Options
  • A. 2
  • B. 5
  • C. 3
  • D. 1
    • Discuss
  • 4. The Laplace transform of a sinusoidal function (eg; sin at) is represented by the curve

  • Options
  • A.
  • B.
  • C.
  • D.
    • Discuss
  • 5. Mass spectrometer is used for the composition analysis of

  • Options
  • A. alloys
  • B. solids
  • C. isotopes
  • D. none of these
    • Discuss
  • 6. A typical example of a physical system with under damped characteristic is a

  • Options
  • A. U-tube manometer.
  • B. spring loaded diaphragm valve.
  • C. CSTR with first order reaction.
  • D. thermocouple kept immersed in a liquid filled thermowell.
    • Discuss
  • 7. Which of the following is not a differential pressure flow meter?

  • Options
  • A. Rotameter
  • B. Flow nozzle
  • C. Orificemeter
  • D. Venturimeter
    • Discuss
  • 8. A bolometer is

  • Options
  • A. used for the measurement of thermal radiation.
  • B. an element which senses optical input and delivers thermal output.
  • C. both (a) & (b).
  • D. neither (a) nor (b).
    • Discuss
  • 9. Bode diagram are generated from output response of the system subjected to which of the following input?

  • Options
  • A. Impulse
  • B. Step
  • C. Ramp
  • D. Sinusoidal
    • Discuss
  • 10. The transfer function of a process is Chemical Engineering Process Control and Instrumentation: The transfer function of a process is. If a step change is introduced into the system, then the response will be

  • Options
  • A. under damped
  • B. critically damped
  • C. over damped
  • D. none of these
    • Discuss

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