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  • Question

  • Emf generated in a thermocouple depends on the temperature


  • Options
  • A. of cold junction only.
  • B. of hot junction only.
  • C. difference between hot and cold junctions.
  • D. difference between cold junction and atmospheric temperature.

  • Correct Answer
  • difference between hot and cold junctions. 

    • Process Control and Instrumentation problems

    Search Results

    • 1. The transfer function of a second order system is

    • Options
    • A.
    • B.
    • C.
    • D. none of these
      • Discuss
    • 2. Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?

    • Options
    • A. CO2
    • B. N2
    • C. O2
    • D. CO
      • Discuss
    • 3. __________ stability method uses open loop transfer function.

    • Options
    • A. Nyquist
    • B. Mikhalov
    • C. Ruth
    • D. none of these
      • Discuss
    • 4. Water is entering a storage tank at a temperature T0 and flow rate Q0 and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. The area of cross-section of the tank is A0. The model that describes the dynamic variation of temperature of water in the tank with time is given as :

    • Options
    • A. Q0(T0 - T) = Ac .
    • B. Q0T0 - QT = Ac .
    • C. Q(T0 - T) = Ac .
    • D. Q(T0 - T) = Ac .
      • Discuss
    • 5. Optical activity of a solution can be determined using a

    • Options
    • A. polarimeter
    • B. polarograph
    • C. dilatometer
    • D. refractrometer
      • Discuss
    • 6. A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is

    • Options
    • A. 45°
    • B. -90°
    • C. -180°
    • D. -45°
      • Discuss
    • 7. A system with a double pole at the origin is unstable since the corresponding term in the time domain

    • Options
    • A. is a constant.
    • B. grows exponentially with time.
    • C. grows linearly with time.
    • D. decays linearly with time.
      • Discuss
    • 8. A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in

    • Options
    • A. light intensity
    • B. current
    • C. flux density
    • D. voltage
      • Discuss
    • 9. pH meter has

    • Options
    • A. one cell
    • B. two cells
    • C. three cells
    • D. no cell
      • Discuss
    • 10. Radiation thermometer can not measure the temperature

    • Options
    • A. inside a pressure vessel.
    • B. of an object without coming in contact with it.
    • C. of liquid oxygen.
    • D. of moving objects at high temperature.
      • Discuss

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