Fuels and Combustion The temperature at which plastic layer formation takes place during carbonisation of coal varies from __________ °C. 350 to 450 550 to 650 700 to 850 100 to 150 350 to 450 550 to 650 700 to 850 100 to 150 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fixed carbon in coal is defined as The total quantity of carbon present in the coal Hundred minus the percentage of volatile matter, ash and moisture The one which is present in the residue after combustion That present in volatile matters The total quantity of carbon present in the coal Hundred minus the percentage of volatile matter, ash and moisture The one which is present in the residue after combustion That present in volatile matters ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Combustion of pulverised coal compared to the lumpy coal Provides better control of furnace temperature Facilitates combustion with lower excess air All of these Provides higher thermal efficiency & flame temperature Provides better control of furnace temperature Facilitates combustion with lower excess air All of these Provides higher thermal efficiency & flame temperature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg. 8000 4000 1000 6000 8000 4000 1000 6000 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Pulverised coal used in boiler firing need not have Lower ash content High fusion point of its ash High bulk density Less moisture content Lower ash content High fusion point of its ash High bulk density Less moisture content ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion __________ prohibits the use of alcohols directly in petrol engines. Low flash point Low calorific value High cost & availability Low octane number Low flash point Low calorific value High cost & availability Low octane number ANSWER DOWNLOAD EXAMIANS APP
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