Fuels and Combustion A sample of natural gas containing 80% methane (CH₄) and rest nitrogen (N₂) is burnt with 20% excess air. With 80% of the combustibles producing CO₂ and the reminder going to CO, the Orsat analysis in volume percent is CO₂ : 7.42, CO : 1.86, O₂ : 4.64, N₂:86.02 CO₂ : 6.26, CO : 1.56, O₂ : 3.91, H₂O :15.66, N₂ : 72.60 CO₂ : 6.39, CO : 1.60, O₂ : 3.99, H₂O:25.96, N₂:72.06 CO₂ : 7.60, CO : 1.90, O₂ : 4.75, N₂ : 85.74 CO₂ : 7.42, CO : 1.86, O₂ : 4.64, N₂:86.02 CO₂ : 6.26, CO : 1.56, O₂ : 3.91, H₂O :15.66, N₂ : 72.60 CO₂ : 6.39, CO : 1.60, O₂ : 3.99, H₂O:25.96, N₂:72.06 CO₂ : 7.60, CO : 1.90, O₂ : 4.75, N₂ : 85.74 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of free moisture in coal during its high temperature carbonisation Increases the loss of fine coal dust from the ovens when charging Reduces the coking time Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls None of these Increases the loss of fine coal dust from the ovens when charging Reduces the coking time Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls None of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm³. 10000 2500 6500 4000 10000 2500 6500 4000 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The calorific value is the highest out of the following for Producer gas Blast furnace gas Coke oven gas Water gas Producer gas Blast furnace gas Coke oven gas Water gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of force moisture in coal is most disadvantageous during its Storage Washing Pulverisation Transportation and handling Storage Washing Pulverisation Transportation and handling ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Actual flame temperature is always lower than the adiabatic flame temperature, because there is Neither A nor B Both A & B Always loss of heat from the flame No possibility of obtaining complete combustion at high temperature Neither A nor B Both A & B Always loss of heat from the flame No possibility of obtaining complete combustion at high temperature ANSWER DOWNLOAD EXAMIANS APP
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