Fuels and Combustion Questions

• Which of the following is not a by-product recovered in a high temperature coal carbonisation plant?
• Combustion reaction of fuels is a/an __________ reaction.
• Higher efficiency in the combustion of solid fuel can not be achieved by
• High temperature in gasification of coal favours
• Which of the following is used for making the explosive 'TNT'?
• Gray King Assay and Swelling Index of a coal is a measure of its
• Junker's calorimeter is used to determine the calorific value of
• Which of the following accentuates clinker-ing trouble on furnace grate burning coal?
• 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.
• Actual flame temperature is always lower than the adiabatic flame temperature, because there is
• A coal having high amount of volatile matter
• Higher percentage of ash in coal meant for the production of metallurgical grade coke
• Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its
• A coal with high ash content is undesirable, as
• Laboratory gas is obtained by the cracking of
• When incomplete combustion loss is high, the flue gas analysis shows large amount of
• The internal energy of the combustion products is __________ compared to that of reactants.
• Combustion of pulverised coal as compared to that of lump coal
• Pick out the wrong statement.
• 'Wobbe index' is a characteristic of