Related Questions

The thermal diffusivities for gases are generally
A More than those for liquids
B Less than those for liquids
C More than those for solids
D Dependent on the viscosity
__________ equation applies to diffusivities in liquids.
A Gilliland
B Hirschfelder
C Wilke and Chang
D None of these
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 thermal conductivity of non-metallic amorphous solids
A Decreases
B Increases
C Remains constant
D First decreases upto certain temperature and then increases
Thermal conductivity of non-metallic amorphous solids with decrease in temperature
A Increases
B Decreases
C Remain constant
D May increase or decrease depending on temperature
Mixing of plastic solids is generally facilitated by
A Dispersion
B Mastication
C Kneading
D None of these
When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called
A Zeroth law of thermodynamics
B First law of thermodynamics
C Second law of thermodynamics
D Kelvin Planck's law
Thermal efficiency of a thermal power plant is of the order of
A 15%
B 20%
C 30%
D 45%
Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.
A Copper
B Steel
C Aluminium
D Brass

Next steps