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 ?

Related Mcqs:

1. 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

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

   A. Oxygen
   B. Carbon dioxide
   C. Carbon monoxide
   D. Sulphur dioxide

3. Zirconia probe is used for the continuous measurement of ______________ flue gases going out of the furnace?

   A. Oxygen in
   B. Carbon dioxide in
   C. Carbon monoxide in
   D. Temperature of

4. 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

5. 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

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

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

7. Smoke density of the flue gas going out of the chimney is measured by a __________________?

   A. Polarograph
   B. Thermal conductivity meter
   C. Photo electric cell
   D. Chromatograph

8. Compositional analysis of flue gas coming out of a furnace in respect of O2 and CO2% can be continuously done by a/an___________________?

   A. Orsat apparatus
   B. Thermal conductivity cell
   C. Zirconia probe
   D. Chromatograph

9. Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant) ?

   A. V/nRT
   B. nRT/V
   C. nRT/P
   D. P/nRT

10. To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with ________________?

    A. Air
    B. A metal powder or graphite
    C. Oil
    D. Mercury