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  • Question

  • 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).

  • Correct Answer
  • multiple first order system. 

    • Process Control and Instrumentation problems

    Search Results

    • 1. The transfer function for an ideal proportional plus reset controller (reset time T) is

    • Options
    • A.
    • B. Kc(1 + TS)
    • C.
    • D.
      • Discuss
    • 2. 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
    • 3. 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
    • 4. Configuration of Bourdon spring tube is never made of __________ shape.

    • Options
    • A. circular
    • B. semi-circular
    • C. helical
    • D. spiral
      • Discuss
    • 5. 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
    • 6. 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
    • 7. Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. According to Bode stability criterian, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is

    • Options
    • A. 0°
    • B. 45°
    • C. 90°
    • D. 180°
      • Discuss
    • 9. Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a

    • Options
    • A. magnetic flowmeter
    • B. pitot tube
    • C. flow nozzle type flowmeter
    • D. turbine flowmeter
      • Discuss
    • 10. The fluid used in hydraulic controller is

    • Options
    • A. water
    • B. steam
    • C. air
    • D. oil
      • Discuss

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