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

  • Starting temperature of optical radiation pyrometer is __________ °C.


  • Options
  • A. 800
  • B. 400
  • C. 1200
  • D. 1500

  • Correct Answer
  • 800 

    • Process Control and Instrumentation problems

    Search Results

    • 1. Liquid argon level in a pressurised storage tank (at 3 kg/cm2 ) is measured by a/an

    • Options
    • A. gage glass
    • B. external float gage
    • C. differential pressure gage
    • D. none of these
      • Discuss
    • 2. Which of the following controllers has maximum offset?

    • Options
    • A. P-controller
    • B. P-I controller
    • C. P-D controller
    • D. P-I-D controller
      • Discuss
    • 3. The amplitude ratio for the sinusoidal response of __________ is < 1.

    • Options
    • A. transportation lag
    • B. first order system
    • C. second order system
    • D. none of these
      • Discuss
    • 4. __________ thermometer can not measure sub-zero (< 0° C) temperature,

    • Options
    • A. Mercury in glass
    • B. Bimetallic
    • C. Vapor pressure
    • D. Resistance
      • Discuss
    • 5. The unit step response of the transfer function 1/(s2 + 2s + 3)

    • Options
    • A. has a non-zero slope at the origin.
    • B. has a damped oscillatory characteristics.
    • C. is overdamped
    • D. is unstable
      • Discuss
    • 6. Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their

    • Options
    • A. low thermal conductivity.
    • B. low electrical conductivity.
    • C. high viscosity index.
    • D. low flash point.
      • Discuss
    • 7. The calibration data of a thermocouple with its cold junction at 0°C are given below.

      The hot junction of the thermocouple is placed in a bath at 80°C, while its cold junction is at 20°C. What is the emf of thermocouple?

    • Options
    • A. 3.26 mv
    • B. 0.80 mv
    • C. 2.46 mv
    • D. 2.43 mv
      • Discuss
    • 8. Turbine flow meters are suitable for

    • Options
    • A. very limited flow ranges.
    • B. cryogenic flow measurements.
    • C. aerospace and in air borne applications.
    • D. both (b) and (c).
      • Discuss
    • 9. Which of the systems having the following transfer function is stable?

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. Use of I-control along with P-control facilitates

    • Options
    • A. elimination of offset
    • B. reduction of offset
    • C. reduction of stability time
    • D. none of these
      • Discuss

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