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
Thermal efficiency of a thermal power plant is of the order of
A 15%
B 20%
C 30%
D 45%
There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would
A Remain same
B Decrease
C Increase
D None of the above
The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called
A Net efficiency
B Efficiency ratio
C Relative efficiency
D Overall efficiency
The ratio of the indicated thermal efficiency to the air standard efficiency is known as
A Mechanical efficiency
B Overall efficiency
C Volumetric efficiency
D Relative efficiency
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
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
Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
A $$\frac{1}{{\text{k}}}$$
B k
C k2
D $$\frac{1}{{{{\text{k}}^2}}}$$
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
Which of the following furnaces will have maximum thermal efficiency?
A Soaking pits
B Walking beam reheating furnace
C Boiler furnace
D Rotary kilns

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