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

  • A system with transfer function A system with transfer function is of __________ order. zero 1st 2nd 3rd is of __________ order.


  • Options
  • A. zero
  • B. 1st
  • C. 2nd
  • D. 3rd

  • Correct Answer
  • 1st 

    • Process Control and Instrumentation problems

    Search Results

    • 1. The thermal emf-temperature relationship of most thermocouples is

    • Options
    • A. linear
    • B. parabolic
    • C. exponential
    • D. square root
      • Discuss
    • 2. Change of angle of refraction with composition comprises the working principle of a

    • Options
    • A. polarimeter
    • B. polarograph
    • C. spectrometer
    • D. refractrometer
      • Discuss
    • 3. Find the Laplace transform of the following input function shown in figure.

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 4. A first order system with unity gain and time constant ? is subjected to a sinusoidal input of frequency w = 1/?. The amplitude ratio for this system is

    • Options
    • A. 1
    • B. 0.5
    • C. 1/2
    • D. 0.25
      • Discuss
    • 5. For the time domain function f(t) = t, the Laplace transform of is given by

    • Options
    • A. 1/2 S3
    • B. 2/S3
    • C. 1/S3
    • D. 2/S2
      • Discuss
    • 6. If response of a control system is to be free of offset and oscillation, the most suitable controller is

    • Options
    • A. proportional controller.
    • B. proportional-derivative(PD)controller.
    • C. proportional-integral (PI) controller.
    • D. proportional integral-derivative (PID) controller.
      • Discuss
    • 7. Conversion formula for converting amplitude ratio (AR) into decibels is

    • Options
    • A. Decibel = 20 log10 (AR)
    • B. Decibel = 20 loge (AR)
    • C. Decibel = 20 log10 (AR)0.5
    • D. Decibel = 20 loge (AR)0.5
      • Discuss
    • 8. Flame photometry is used for the determination of compositional analysis of

    • Options
    • A. solids
    • B. alkali metals
    • C. natural gas
    • D. isotopes
      • Discuss
    • 9. Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 - 1600°C?

    • Options
    • A. Optical pyrometer
    • B. Radiation pyrometer
    • C. Photoelectric pyrometer
    • D. Thermocouples
      • Discuss
    • 10. Gain margin is equal to the

    • Options
    • A. amplitude ratio
    • B. reciprocal of amplitude ratio
    • C. gain in P controller
    • D. gain in P-I controller
      • Discuss

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