Fuels and Combustion Temperature of preheated air used for the transportation of pulverised coal through pipes to the burner of a boiler furnace is restricted to a maximum limit of about 300° C to avoid the Risk of explosion Requirement of large volume combustion chamber Incomplete combustion of coal Chances of clinker formation Risk of explosion Requirement of large volume combustion chamber Incomplete combustion of coal Chances of clinker formation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is not a by-product recovered in a high temperature coal carbonisation plant? Pitch-cresosote mixture (PCM) Ethylene Benzol Napthalene Pitch-cresosote mixture (PCM) Ethylene Benzol Napthalene ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Hard coke is manufactured from Anthracite Semi-anthracite Lignite Bituminous coal Anthracite Semi-anthracite Lignite Bituminous coal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its Yield of carbonised products Caking index Calorific value Friability & oxygen content Yield of carbonised products Caking index Calorific value Friability & oxygen content ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Turndown ratio of a gas burner is equal to the Minimum to maximum heat input ratio Maximum to minimum permissible gas flow rate Both A & B Maximum to minimum heat input ratio Minimum to maximum heat input ratio Maximum to minimum permissible gas flow rate Both A & B Maximum to minimum heat input ratio ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The gasification reaction represented by, C + H₂O = CO + H₂, is Exothermic Autocatalytic Endothermic Catalytic Exothermic Autocatalytic Endothermic Catalytic ANSWER DOWNLOAD EXAMIANS APP
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