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Home Chemical Engineering Process Control and Instrumentation Comments

  • Question
  • __________ is the static characteristics of an instrument,


  • Options
  • A. Response
  • B. Tine lag
  • C. Drift
  • D. dynamic error

  • Correct Answer
  • Drift 


  • Process Control and Instrumentation problems


    Search Results


    • 1. The open loop transfer function of a control system is . This represents

    • Options
    • A. a first order system.
    • B. dead time system.
    • C. a first order time lag.
    • D. a second order system.
    • Discuss
    • 2. Presence of a small amount of water in the organic systems can be determined by the __________ method.

    • Options
    • A. electrical conductivity
    • B. polarimetry
    • C. emission spectroscopy
    • D. dielectric constant end loss factor
    • Discuss
    • 3. 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
    • 4. Thermal conductivity cell is the primary element of a/an __________ analyser.

    • Options
    • A. oxygen
    • B. carbon dioxide
    • C. carbon monoxide
    • D. sulphur dioxide
    • Discuss
    • 5. 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
    • 6. A pyrheliometer is an instrument used for measuring the

    • Options
    • A. bright sunshine period.
    • B. beam radiation.
    • C. diffuse radiation.
    • D. none of these.
    • Discuss
    • 7. A simple pitot tube measures the

    • Options
    • A. average velocity
    • B. maximum velocity
    • C. point velocity
    • D. static pressure
    • Discuss
    • 8. Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature

    • Options
    • A. emf produced is very low of the order of microvolt.
    • B. embrittlement of iron occurs.
    • C. rusting of iron takes place.
    • D. both (b) and (c).
    • Discuss
    • 9. Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an

    • Options
    • A. venturimeter
    • B. orificemeter
    • C. magnetic flow meter
    • D. hot wire anemometer
    • Discuss
    • 10. The level of a liquid under pressure can be determined using

    • Options
    • A. bubbler system
    • B. differential pressure manometer
    • C. diaphragm box system
    • D. air-trap system
    • Discuss


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