A. CO
B. CO2
C. H2O
D. Both B. & C.
Related Mcqs:
- Incomplete combustion of a fuel is characterised by the high _______________ in the flue gas?
A. Smoke
B. Temperature
C. Oxygen
D. Carbon monoxide - Efficiency of the combustion of a fuel is judged by the ______________ the flue gas?
A. % of CO2 in
B. % of O2in
C. Temperature of
D. Colour of - Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO2, 20%CO and 10%O2. The percent excess oxygen used is __________________?
A. 20
B. 12.5
C. 0
D. 10 - For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will_____________________?
A. Increase
B. Decrease
C. Increase or decrease depending on the fuel type
D. Not change - 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 - Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around ______________ percent?
A. 4
B. 96
C. 20
D. 40 - When incomplete combustion loss is high, the flue gas analysis shows large amount of ________________?
A. CO2
B. CO
C. O2
D. C - Supply of excess air for complete combustion of fuel is necessitated to facilitate___________________?
A. Its thorough mixing with air
B. Attainment of chemical equilibrium
C. Attainment of high temperature
D. None of these - Which of the following will generate maximum volume of product of complete combustion (Nm3/Nm3 of fuel) ?
A. Carburetted water gas
B. Blast furnace gas
C. Natural gas
D. Producers’ gas - Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?
A. 71%
C. In between 37 & 71%
D. None of these
