Thermal conductivity cell is the primary element of a/an _____________ analyser?

Related Mcqs:

1. Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity ?

   A. CO2
   B. N2
   C. O2
   D. CO

2. The frequency response of a dynamic element shows a constant magnitude ratio at all frequencies. The element exhibits a negative phase shift at all frequencies. The absolute value of the phase shift increases linearly with frequency. The element has the transfer function ?

   A. e-ηS
   B. (T1S + 1)/(T2S + 1)
   C. (T1S/(T2S + 1)
   D. (T1S + 1)/(T2S

3. Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic ?

   A. CO2
   B. O2
   C. NO
   D. NO2

4. Thermal conductivity measurement is used for the determination of________________?

   A. O2 percentage in the flue gas
   B. Specific gravity of petrofuels
   C. Composition of an alloy
   D. CO2 percentage in the flue gas

5. Thermal conductivity measurement com-prises the working principle of a_________________?

   A. CO2 analyser
   B. Polarimeter
   C. Spectrometer
   D. Chromatograph

6. Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion ?

   A. Nickel
   B. Brass
   C. Chromel
   D. Invar

7. The ______________ of a vapor pressure thermometer is a primary element?

   A. Pointer
   B. Bourdon tube
   C. Bulb
   D. None of these

8. Thermal well made of _____________ gives the fastest speed of response, while measuring temperature by thermocouples?

   A. Steel
   B. Vycor (a glass)
   C. Nichrome
   D. Inconel

9. With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer ?

   A. Increases
   B. Decreases
   C. Remain constant
   D. Increases exponentially

10. The _____________ of a vapor pressure thermometer is a functioning element?

    A. Pointer
    B. Bourdon tube
    C. Bulb
    D. None of these