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

  • The unit step response of the transfer function 1/(s2 + 2s + 3)


  • Options
  • A. has a non-zero slope at the origin.
  • B. has a damped oscillatory characteristics.
  • C. is overdamped
  • D. is unstable

  • Correct Answer
  • has a damped oscillatory characteristics. 

    • Process Control and Instrumentation problems

    Search Results

    • 1. Paramagnetism method is not used for the composition determination of __________ in gases.

    • Options
    • A. oxygen
    • B. oxides of nitrogen
    • C. carbon dioxide
    • D. any of these
      • Discuss
    • 2. The amplitude ratio for the sinusoidal response of a __________ is 1.

    • Options
    • A. first order system
    • B. second order system
    • C. transportation lag
    • D. none of these
      • Discuss
    • 3. Which of the following judges the accuracy of an instrument?

    • Options
    • A. Dead zone
    • B. Drift
    • C. Static error
    • D. None of these
      • Discuss
    • 4. Positioning controllers are used for

    • Options
    • A. low loads
    • B. temperature changes
    • C. high loads
    • D. flow rate changes
      • Discuss
    • 5. The unit step response of the transfer functionreaches its final steady state assymptotically after

    • Options
    • A. a monotonic increase.
    • B. a monotonic decrease.
    • C. initially increasing and then decreasing.
    • D. increasing decreasing and then increasing.
      • Discuss
    • 6. __________ thermometer can not measure sub-zero (< 0° C) temperature,

    • Options
    • A. Mercury in glass
    • B. Bimetallic
    • C. Vapor pressure
    • D. Resistance
      • Discuss
    • 7. The amplitude ratio for the sinusoidal response of __________ is < 1.

    • Options
    • A. transportation lag
    • B. first order system
    • C. second order system
    • D. none of these
      • Discuss
    • 8. Which of the following controllers has maximum offset?

    • Options
    • A. P-controller
    • B. P-I controller
    • C. P-D controller
    • D. P-I-D controller
      • Discuss
    • 9. Liquid argon level in a pressurised storage tank (at 3 kg/cm2 ) is measured by a/an

    • Options
    • A. gage glass
    • B. external float gage
    • C. differential pressure gage
    • D. none of these
      • Discuss
    • 10. Starting temperature of optical radiation pyrometer is __________ °C.

    • Options
    • A. 800
    • B. 400
    • C. 1200
    • D. 1500
      • Discuss

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