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Home Chemical Engineering Process Control and Instrumentation Comments

  • Question
  • Sub-zero temperature (< 0°C) can be measured by a constant volume gas thermometer employing


  • Options
  • A. helium
  • B. nitrogen
  • C. hydrogen
  • D. none of these

  • Correct Answer
  • helium 


  • Process Control and Instrumentation problems


    Search Results


    • 1. 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
    • 2. 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
    • 3. 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
    • 4. A simple pitot tube measures the

    • Options
    • A. average velocity
    • B. maximum velocity
    • C. point velocity
    • D. static pressure
    • Discuss
    • 5. 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
    • 6. The term analogous to voltage in a single tank system is the

    • Options
    • A. heat content of the system.
    • B. liquid volume in the tank.
    • C. flow rate.
    • D. level of liquid.
    • Discuss
    • 7. Which is the symbol for "pneumatic control valve"?

    • Options
    • A.
    • B.
    • C.
    • D. none of these
    • Discuss
    • 8. When the damping co-efficient (?) is unity, the system is

    • Options
    • A. Overdamped.
    • B. Critically damped.
    • C. Underdamped.
    • D. Highly fluctuating.
    • Discuss
    • 9. Compositional analysis of flue gas coming out of a furnace in respect of O2 and CO2% can be continuously done by a/an

    • Options
    • A. orsat apparatus
    • B. thermal conductivity cell
    • C. zirconia probe
    • D. chromatograph
    • Discuss
    • 10. Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called

    • Options
    • A. dielectrics
    • B. insulators
    • C. semi conductors
    • D. conductors
    • Discuss


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