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Process Control and Instrumentation problems

  • 1. 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
  • 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. 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
  • 4. 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
    • Discuss
  • 5. Configuration of Bourdon spring tube is never made of __________ shape.

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

  • Options
  • A.
  • B.
  • C.
  • D.
    • Discuss
  • 7. 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
  • 8. The transfer function for an ideal proportional plus reset controller (reset time T) is

  • Options
  • A.
  • B. Kc(1 + TS)
  • C.
  • D.
    • Discuss
  • 9. 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
  • 10. Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.

  • Options
  • A. Peltier
  • B. Thomson
  • C. Seebeck
  • D. none of these
    • Discuss

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