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

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. 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

3. 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

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

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

5. Thermal wells are used in the temperature measurement to____________________?

   A. Guard against corrosive and oxidising action on thermocouple materials
   B. Reduce measuring lag
   C. Increase the fidelity
   D. Increase the sensitivity

6. Working principle of disappearing filament type optical pyrometer is based on the ________________?

   A. Wien’s law
   B. Seebeck effect
   C. Kirchoff’s law
   D. Peltier effect

7. Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?

   A. Water
   B. Mercury
   C. Methyl alcohol
   D. Carbon-tetrachloride

8. Working principle of radiation pyrometer is based on the ________________?

   A. Wien’s law
   B. Kirchoff’s law
   C. Stefan-Boltzmann law
   D. Seebeck effect

9. Working principle of radiation pyrometer is based on the __________________?

   A. Wien’s law
   B. Kirchoff’s law
   C. Stefan Boltzmann law
   D. Seebeck effect

10. Working principle of mercury in glass thermometer is__________________?

    A. Volumetric expansion
    B. Pressure rise with temperature
    C. Linear expansion
    D. None of these