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  • Question

  • 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.

  • Correct Answer
  • spring loaded diaphragm valve. 

    • Process Control and Instrumentation problems

    Search Results

    • 1. Mass spectrometer is used for the composition analysis of

    • Options
    • A. alloys
    • B. solids
    • C. isotopes
    • D. none of these
      • Discuss
    • 2. The Laplace transform of a sinusoidal function (eg; sin at) is represented by the curve

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 3. Number of poles in a system with transfer function is

    • Options
    • A. 2
    • B. 5
    • C. 3
    • D. 1
      • Discuss
    • 4. 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
    • 5. 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
    • 6. Which of the following is not a differential pressure flow meter?

    • Options
    • A. Rotameter
    • B. Flow nozzle
    • C. Orificemeter
    • D. Venturimeter
      • Discuss
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. Stability of a control system containing a transportation lag can be best analysed by

    • Options
    • A. Routh test
    • B. root locus methods
    • C. frequency response methods
    • D. none of these
      • Discuss

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