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Home Chemical Engineering Process Control and Instrumentation Comments

  • Question
  • The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches


  • Options
  • A. -1
  • B. 0
  • C. 1
  • D. ?

  • Correct Answer



  • Process Control and Instrumentation problems


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    • 1. Polarograph is meant for the analysis of

    • Options
    • A. gaseous mixture
    • B. miscible liquids
    • C. solids
    • D. isotopes
    • Discuss
    • 2. Which of the following fluid flow measuring devices can measure the largest flow rate?

    • Options
    • A. V-notch
    • B. Rotameter
    • C. Orificemeter
    • D. Weir
    • Discuss
    • 3. Zirconia probe is used for the measurement of

    • Options
    • A. humidity of air.
    • B. % CO2 in flue gas.
    • C. % O2 in flue gas.
    • D. speed of a submarine.
    • Discuss
    • 4. Phase lag of the frequency response of a second order system to a sinusoidal forcing function

    • Options
    • A. is 30°
    • B. is 90° at the most
    • C. approaches 180° asymptotically
    • D. is 120°
    • Discuss
    • 5. Stalagmometer is used for the measurement of

    • Options
    • A. kinematic viscosity
    • B. surface tension
    • C. refractive index
    • D. optical activity
    • Discuss
    • 6. E.m.f. generated by thermocouples is of the order of

    • Options
    • A. millivolts
    • B. microvolts
    • C. volts
    • D. kilo volts
    • Discuss
    • 7. Which of the following flow-metering instru-ments is an areameter?

    • Options
    • A. Venturimeter
    • B. Rotameter
    • C. Pitot tube
    • D. Hot wire anemometer
    • Discuss
    • 8. Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the

    • Options
    • A. mercury in glass thermometer.
    • B. optical pyrometer.
    • C. iron-constantan thermocouple.
    • D. alcohol filled thermometer.
    • Discuss
    • 9. Thermal conductivity cell is the primary element of a/an __________ analyser.

    • Options
    • A. oxygen
    • B. carbon dioxide
    • C. carbon monoxide
    • D. sulphur dioxide
    • Discuss
    • 10. Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is

    • Options
    • A. water
    • B. carbon tetrachloride
    • C. paraffin
    • D. ethylene glycol
    • Discuss


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