Fuels and Combustion Height of coke oven is limited (say maximum upto 7 metres) mainly by the Problem in door cleaning Structural strength of silica bricks Problem of uniform heating along its height Buckling of ram of pusher car at the time of coke pushing Problem in door cleaning Structural strength of silica bricks Problem of uniform heating along its height Buckling of ram of pusher car at the time of coke pushing ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in Closed space without any ventilation facility Fine sizes without the presence of any lump Shallow and small piles Large heaps with small surface to volume ratio Closed space without any ventilation facility Fine sizes without the presence of any lump Shallow and small piles Large heaps with small surface to volume ratio ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion 'Fat coals' are those coals which have very high Fusion point of its ash Volatile matter content Inherent moisture content Caking capacity Fusion point of its ash Volatile matter content Inherent moisture content Caking capacity ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because There are chances of explosion during preheating The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot It reduces its calorific value tremendously It reduces its flame temperature tremendously There are chances of explosion during preheating The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot It reduces its calorific value tremendously It reduces its flame temperature tremendously ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion 'Wobbe index' is a characteristic of Solid fuels Liquid fuels Gaseous fuels Fat coals Solid fuels Liquid fuels Gaseous fuels Fat coals ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Use of excess of combustion air in the combustion of fuels results in Heat losses None of these Long flame Condensation of water vapour from the fuel gas Heat losses None of these Long flame Condensation of water vapour from the fuel gas ANSWER DOWNLOAD EXAMIANS APP
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