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Home Chemical Engineering Process Control and Instrumentation Comments

  • Question
  • Nitrogen gas constant volume thermometer is suitable for measuring a temperature of __________ °C.


  • Options
  • A. 0-100
  • B. < 0
  • C. > 100.
  • D. > 50

  • Correct Answer
  • > 100. 


  • Process Control and Instrumentation problems


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    • 1. Concentration of sugar solution can be determined by the

    • Options
    • A. polarimetry
    • B. flame photometry
    • C. emission spectroscopy
    • D. oscillometry
    • Discuss
    • 2. Humidity of air can be determined by a

    • Options
    • A. chromatograph
    • B. sling psychrometer
    • C. mass spectrometer
    • D. polarimeter
    • Discuss
    • 3. In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction

    • Options
    • A. heavy distillates
    • B. intermediate distillates
    • C. light ends
    • D. residues
    • Discuss
    • 4. Visbreaking

    • Options
    • A. uses natural gas as feed.
    • B. is carried out at atmospheric pressure.
    • C. produces fuel oil of lower viscosity.
    • D. produces gasoline only.
    • Discuss
    • 5. Which of the following processes is used for the production of petroleum coke?

    • Options
    • A. Stabilisation
    • B. Visbreaking
    • C. Cracking
    • D. Reforming
    • Discuss
    • 6. Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in __________ in the electrical resistance of the wire.

    • Options
    • A. no change
    • B. decrease
    • C. increase
    • D. exponential decrease
    • Discuss
    • 7. Specific gravity of a liquid can not be measured by a/an

    • Options
    • A. anemometer
    • B. specific gravity bottle
    • C. pycnometer
    • D. hydrometer
    • Discuss
    • 8. The frequency response of a first order system, has a phase shift with lower and upper bounds given by

    • Options
    • A. - ?, ?/2
    • B. -?/2, ?/2
    • C. -?/2, 0
    • D. 0, ?/2
    • Discuss
    • 9. Which of the following can not measure a temperature of 1600°C?

    • Options
    • A. Platinum resistance thermometer
    • B. Thermocouple
    • C. Photo-electric pyrometer
    • D. Radiation pyrometer
    • Discuss
    • 10. Degree to which an instrument indicates the changes in measured variable without dynamic error is called its

    • Options
    • A. speed of response
    • B. reproducibility
    • C. fidielity
    • D. static characteristics
    • Discuss


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