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  • Question

  • A bolometer is


  • Options
  • A. used for the measurement of thermal radiation.
  • B. an element which senses optical input and delivers thermal output.
  • C. both (a) & (b).
  • D. neither (a) nor (b).

  • Correct Answer
  • both (a) & (b). 

    • Process Control and Instrumentation problems

    Search Results

    • 1. Which of the following is not a differential pressure flow meter?

    • Options
    • A. Rotameter
    • B. Flow nozzle
    • C. Orificemeter
    • D. Venturimeter
      • Discuss
    • 2. A typical example of a physical system with under damped characteristic is a

    • Options
    • A. U-tube manometer.
    • B. spring loaded diaphragm valve.
    • C. CSTR with first order reaction.
    • D. thermocouple kept immersed in a liquid filled thermowell.
      • Discuss
    • 3. Mass spectrometer is used for the composition analysis of

    • Options
    • A. alloys
    • B. solids
    • C. isotopes
    • D. none of these
      • Discuss
    • 4. The Laplace transform of a sinusoidal function (eg; sin at) is represented by the curve

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. Number of poles in a system with transfer function is

    • Options
    • A. 2
    • B. 5
    • C. 3
    • D. 1
      • Discuss
    • 6. Bode diagram are generated from output response of the system subjected to which of the following input?

    • Options
    • A. Impulse
    • B. Step
    • C. Ramp
    • D. Sinusoidal
      • Discuss
    • 7. The transfer function of a process is . If a step change is introduced into the system, then the response will be

    • Options
    • A. under damped
    • B. critically damped
    • C. over damped
    • D. none of these
      • Discuss
    • 8. Stability of a control system containing a transportation lag can be best analysed by

    • Options
    • A. Routh test
    • B. root locus methods
    • C. frequency response methods
    • D. none of these
      • Discuss
    • 9. When a bare thermocouple is covered by a protective sheath, the response becomes

    • Options
    • A. faster and oscillatory.
    • B. faster and non-oscillatory.
    • C. slower and oscillatory.
    • D. slower and non-oscillatory.
      • Discuss
    • 10. Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by

    • Options
    • A. making the volume of thermometer bulb as large as conveniently possible.
    • B. reducing the volume of the capillary to a minimum.
    • C. reducing the volume of the receiving element to a minimum.
    • D. all 'a', 'b' & 'c'.
      • Discuss

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