A. Proper fuel preparation
B. Keeping the flue gas exhaust temperature very high
C. Adopting efficient-fuel firing technique & equipment
D. Supplying correct quantity of combustion air
Related Mcqs:
- Higher fuel combustion efficiency cannot be achieved by_________________?
A. Preheating of fuel gases & combustion air
B. Reducing sulphur content in the fuel
C. Adopting proper fuel firing technique & fuel preparation
D. Supplying correct amount of combustion air - The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called ?
A. Fire point
B. Smoke point
C. Burning temperature
D. Kindling temperature - 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 - 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 - Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about _____________ °C?
A. 400-500
B. 900-1000
C. 1400-1500
D. 1700-1800 - Use of excess of combustion air in the combustion of fuels results in__________________?
A. Heat losses
B. Long flame
C. Condensation of water vapour from the fuel gas
D. None of these - Deficiency of combustion air during combustion of a gaseous fuel_____________________?
A. Lengthens the flame
B. Causes heat loss of fuel by its partial combustion
C. Both A. & B.
D. Shortens the flame - 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 - Which of the following constituents of a fuel does not contribute to its calorific value on combustion ?
A. Hydrogen
B. Sulphur
C. Carbon
D. None of these - During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the____________________?
A. Incomplete combustion
B. Complete combustion
C. High oxygen in flue gas
D. None of these
