A. H2
B. CO
C. CH4
D. C2H6
Related Mcqs:
- 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 - Air/gas ratio for complete combustion will be the highest for__________________?
A. LPG
B. Gobar gas
C. Coke oven gas
D. Carburetted water gas - The heat of combustion of a fuel___________________?
A. Is equal to the heat of formation
B. Is always negative
C. Can’t be known without calculating it
D. Is always positive - If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be_____________?
A. Low
B. High
C. Very high, if the fuel is of low calorific value
D. None of these - Net calorific value is the gross calorific value less the _______________ heat of water in the product of combustion when cooled to 15°C ?
A. Sensible
B. Latent
C. Sensible and latent
D. None of these - Which of the following would require least amount of secondary air for combustion ?
A. Coke breeze containing 25% ash and 2% volatile matter
B. Anthracite containing 10% volatile matter and 8% ash
C. Bituminous coal containing 20% ash and 25% volatile matter
D. Semi-bituminous coal containing 25% ash and 20% volatile matter - 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 - Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas ?
A. Blast furnace gas
B. Natural gas
C. Producer gas
D. Water gas
