Related Questions

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
For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally
A Decreases
B Increases
C Remains unchanged
D Increases exponentially
Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
A $$\frac{1}{{\text{k}}}$$
B k
C k2
D $$\frac{1}{{{{\text{k}}^2}}}$$
Which of the following has maximum thermal conductivity at the same temperature?
A Steel
B Petrol
C Air
D All of the above
Which of the following has maximum thermal conductivity?
A Iron
B Coal
C Nitrogen
D Tar
Which of the metals has the maximum thermal conductivity?
A Iron
B Aluminium
C Silver
D Copper
Which of the following has the highest value of thermal conductivity?
A Water
B Steam
C Solid ice
D Melting ice
________ has the highest value of thermal conductivity.
A Copper
B Aluminium
C Brass
D Steel
Among liquids, water has a comparatively high value of thermal conductivity, due to its
A Low density
B High viscosity
C Partial ionisation
D Dense structure
Which of the following commonly used condenser tube materials has the lowest thermal conductivity?
A Admirability brass
B Stainless steel
C Aluminium brass
D Titanium

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