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  • Question

  • Measurement of pressure in ammonia reactor is done by


  • Options
  • A. Bourdon gauge
  • B. U-tube manometer
  • C. Inclined tube manometer
  • D. Pirani guage

  • Correct Answer
  • Bourdon gauge 

    • Process Control and Instrumentation problems

    Search Results

    • 1. "A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency." This is __________ criterion.

    • Options
    • A. Bode stability
    • B. Nyquist
    • C. Routh stability
    • D. none of these
      • Discuss
    • 2. The __________ of a vapor pressure thermometer is a primary element.

    • Options
    • A. pointer
    • B. Bourdon tube
    • C. bulb
    • D. none of these
      • Discuss
    • 3. Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C.

    • Options
    • A. mercury thermometer
    • B. bimetallic thermometer
    • C. radiation pyrometer
    • D. none of these
      • Discuss
    • 4. Feed forward controller accounts for the __________ changes.

    • Options
    • A. set point
    • B. load
    • C. both (a) & (b)
    • D. neither (a) nor (b)
      • Discuss
    • 5. The fluid used in hydraulic controller is

    • Options
    • A. water
    • B. steam
    • C. air
    • D. oil
      • Discuss
    • 6. A process is initially at steady state with its output y=l for an input u=l. The input is suddenly changed to 2 at time t=0. The output response is y(t)=1+2t. The transfer function of the process is

    • Options
    • A. 2/s
    • B.
    • C.
    • D.
      • Discuss
    • 7. What is the dynamic error in a critically damped second order instrument for a ramp input (At)?

    • Options
    • A. 0.5 AT
    • B. 2 AT
    • C. AT
    • D. 1.5 AT
      • Discuss
    • 8. Which of the following is a 'contact' pyrometer?

    • Options
    • A. resistance pyrometer
    • B. optical pyrometer
    • C. radiation pyrometer
    • D. infra red pyrometer
      • Discuss
    • 9. On-off controllers are normally used for

    • Options
    • A. low loads
    • B. temperature changes
    • C. flow rate changes
    • D. none of these
      • Discuss
    • 10. Pressure of 0.01 psi (absolute) can be measured by __________ gauge.

    • Options
    • A. ionisation
    • B. Pirani
    • C. Mcloid
    • D. none of these
      • Discuss

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