Related Questions

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 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
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
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows __________ law.
A Hyperbolic
B Parabolic
C Linear
D Logarithmic
With increase in temperature, the thermal conductivity of fresh lubricating oil
A Increases
B Decreases
C Remains unchanged
D May increase or decrease; depends on its composition
With increase in temperature, the thermal conductivity of non-metallic amorphous solids
A Decreases
B Increases
C Remains constant
D First decreases upto certain temperature and then increases
With increase in temperature, the thermal conductivity of a gas
A Increases
B Decreases
C Remains same
D May increase or decrease depending on the type of gas
With increase in temperature, the thermal conductivity of steel
A Increases
B Decreases
C Remains unchanged
D Increases exponentially
Thermal conductivity of a gas at low density, __________ with increase in temperature.
A Decreases
B Increases
C Remains unchanged
D May increase or decrease; depends on the gas
Thermal conductivities of most of the liquids __________ with rise in temperature.
A Increases
B Decreases
C Remains unchanged
D May increase or decrease; depends on the liquid

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