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

  • Working principle of disappearing filament type optical pyrometer is based on the


  • Options
  • A. Wien's law
  • B. Seebeck effect
  • C. Kirchoff's law
  • D. Peltier effect

  • Correct Answer
  • Wien's law 

    • Process Control and Instrumentation problems

    Search Results

    • 1. In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.

    • Options
    • A. outlet flow rate
    • B. level
    • C. both (a) & (b)
    • D. neither (a) nor (b)
      • Discuss
    • 2. __________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'.

    • Options
    • A. Celcius
    • B. Rankine
    • C. Reumur
    • D. Farenhite
      • Discuss
    • 3. Identify an unbounded input from inputs whose transfer functions are given below

    • Options
    • A. 1
    • B. 1/S
    • C. 1/S2
    • D. 1/(S2 + 1)
      • Discuss
    • 4. A sinusoidal variation in the input passing through a linear first order system

    • Options
    • A. becomes more oscillatory (frequency increases).
    • B. becomes less oscillatory (frequency decreases).
    • C. gets amplified (magnitude increases).
    • D. gets attenuated (magnitude decreases).
      • Discuss
    • 5. Range of hydrogen gas constant volume themometer is __________ °C.

    • Options
    • A. -10 to 20
    • B. 0 to 100
    • C. 100 - 500
    • D. 400 - 1000
      • Discuss
    • 6. Configuration of Bourdon spring tube is never made of __________ shape.

    • Options
    • A. circular
    • B. semi-circular
    • C. helical
    • D. spiral
      • Discuss
    • 7. What is the overall transfer function (C/R) of the following block diagram if G = G1. G2. G3 and H = H1.H2.

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. Thermodynamic celcius scale of temperature measurement is

    • Options
    • A. defined on the basis of melting point of ice and evaporation temperature of water vapor.
    • B. defined on the basis of melting point of ice and condensation temperature of water vapor.
    • C. having an interval of 100° between ice point to steam point.
    • D. both (b) and (c)
      • Discuss
    • 9. The transfer function for an ideal proportional plus reset controller (reset time T) is

    • Options
    • A.
    • B. Kc(1 + TS)
    • C.
    • D.
      • Discuss
    • 10. Thermocouple in a thermal well behaves as a true

    • Options
    • A. first order system.
    • B. second order system (overdamped).
    • C. multiple first order system.
    • D. second order system (underdamped).
      • Discuss

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