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
The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as
A Efficiency of the boiler
B Efficiency of the chimney
C Efficiency of the fan
D Power of the boiler
Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.
A CO content
B Dew point
C CO2 content
D O2 content
If oxygen content in the flue gas rises too high, fuel is being wasted by
A Incomplete combustion
B Dry gas/stack gas loss
C Moisture loss
D None of these
Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic?
A CO2
B O2
C NO
D NO2
With increase in C/H ratio of a fuel, the dew point of flue gases
A Increases
B Decreases
C Remains same
D May increase or decrease ; depends on the type of fuel
Incomplete combustion of a fuel is characterised by the high __________ in the flue gas.
A Smoke
B Temperature
C Oxygen
D Carbon monoxide
Limestone powder is injected during pulverised coal burning in boilers to __________ the flue gases.
A Reduce SO2 content in
B Catalytically convert SO2 to SO3 in
C Increase the dew point of
D None of these
Zirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace.
A Oxygen in
B Carbon dioxide in
C Carbon monoxide in
D Temperature of
Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.
A [

A.

B.

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