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
Incomplete combustion of a fuel is characterised by the high __________ in the flue gas.
A Smoke
B Temperature
C Oxygen
D Carbon monoxide
Which furnace employs an I.D. fan for the removal of flue gases from the furnace?
A Coke oven
B Blast furnace stoves
C Beehive coke oven
D High pressure boiler
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is known as
A Superheater
B Air-preheater
C Economizer
D Injector
Incomplete combustion can be best judged by
A Smoky chimney exit
B Excess air in flue gases
C Measuring carbon monoxide in flue gases
D Measuring temperature of flue gases at exit of furnace
When incomplete combustion loss is high, the flue gas analysis shows large amount of
A CO2
B CO
C O2
D C
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
High sulphur content in a fuel __________ of the flue gases.
A Decreases the dew point
B Increases the dew point
C Reduces the combustion efficiency by limiting the permissible temperature reduction
D Both B & C
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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