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
With increase in temperature, the electrical conductivity would
A Increase in metals as well as in intrinsic semiconductor
B Increase in metals but decrease in intrinsic semiconductor
C Decrease in metals but increase in intrinsic semiconductor
D Decrease in metals as well as in intrinsic semiconductor
With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer
A Increases
B Decreases
C Remains constant
D Increases exponentially
With increase in temperature, the electrical conductivity of a __________ decreases.
A Semi-conductor
B Metal or alloy
C Dielectric
D None of these
The electrical conductivity of a __________ decreases with rise in temperature.
A Metal/alloy
B Semi-conductor
C Dielectric
D None of these
With rise in temperature the resistance of semiconductors
A Decreases
B Increases
C First increases and then decreases
D Remains constant
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

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