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  • Question
  • The unit step response of the transfer functionThe unit step response of the transfer functionreaches its final steady state assymptotically after reaches 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.

  • Correct Answer
  • a monotonic increase. 


  • Process Control and Instrumentation problems


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    • 1. The term analogous to the electrical current in a thermal system is the

    • Options
    • A. temperature difference
    • B. heat flow rate
    • C. heat content in the system
    • D. none of these
    • Discuss
    • 2. The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly

    • Options
    • A. linear
    • B. non-linear
    • C. parabolic
    • D. hyperbolic
    • Discuss
    • 3. Which of the following is not a speed measuring instrument?

    • Options
    • A. Psychrometer
    • B. Stroboscope
    • C. Tachometer
    • D. All (a), (b) and (c)
    • Discuss
    • 4. An amplitude ratio of 0.1 corresponds to __________ decibels.

    • Options
    • A. 20
    • B. -20
    • C. 10
    • D. -10
    • Discuss
    • 5. The response of two tanks of same size and resistance in series is

    • Options
    • A. under damped
    • B. critically damped
    • C. over damped
    • D. none of the above
    • Discuss
    • 6. Positioning controllers are used for

    • Options
    • A. low loads
    • B. temperature changes
    • C. high loads
    • D. flow rate changes
    • Discuss
    • 7. Which of the following judges the accuracy of an instrument?

    • Options
    • A. Dead zone
    • B. Drift
    • C. Static error
    • D. None of these
    • Discuss
    • 8. 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
    • 9. 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
    • 10. 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
    • Discuss


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