Fuels and Combustion Beehive coke oven Takes 2-3 days for coking of coal but requires no external fuel for heating Produces coke with very poor strength Gives larger yield of coke (around 85%) as compared to by-product ovens Facilitates by-products recovery Takes 2-3 days for coking of coal but requires no external fuel for heating Produces coke with very poor strength Gives larger yield of coke (around 85%) as compared to by-product ovens Facilitates by-products recovery ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High temperature in gasification of coal favours High production of CO₂ High production of CO Both B and C Low production of CO₂ High production of CO₂ High production of CO Both B and C Low production of CO₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coke compared to the coal from which it has been made, contains Less volatile matter More carbon All of these Greater percentage of ash Less volatile matter More carbon All of these Greater percentage of ash ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following reactions occuring during coal gasification is called the Neumann reversal reaction? C + 2H₂O ⟷ CO₂ + 2H₂ 2CO ⟷ C + CO₂ C + H₂O ⟷ CO + H₂ CO + H₂O ⟷ CO₂ + H₂ C + 2H₂O ⟷ CO₂ + 2H₂ 2CO ⟷ C + CO₂ C + H₂O ⟷ CO + H₂ CO + H₂O ⟷ CO₂ + H₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A sooty flame can be made non-luminous by Admitting more air Shutting air supply Shutting gas supply Admitting more gas Admitting more air Shutting air supply Shutting gas supply Admitting more gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon None of these Is more difficult to ignite and produces a shorter flame Is less liable to spontaneous combustion on storage Requires smaller combustion space and less secondary air None of these Is more difficult to ignite and produces a shorter flame Is less liable to spontaneous combustion on storage Requires smaller combustion space and less secondary air ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS