Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around ______________ percent?

Related Mcqs:

A coal having high volatile matter content will ________________?

A. Give less yield of tar and gas on carbonisation B. Burn with a small non-smoky flame C. Have a very high calorific value D. None of these...

Low temperature oxidation of stored coal results in the________________?

A. Decrease in its caking power & calorific value B. Decrease in its carbon & hydrogen content C. Increase in its oxygen content D. All A., B. and A....

Too much of excess air in combustion results in high___________________?

A. Fuel consumption for the same heat load B. Stack gas temperature C. Percentage of oxygen in flue gases D. All A., B. and C....

Main constituent of natural gas is ________________?

A. CH4 (upto 90%) B. C2H6 C. C3H8 D. H2...

Which of the following is not a manufactured fuel ?

A. Furnace oil B. Bagasse C. Semi-coke D. Kerosene...