Fuels and Combustion Highly reactive coke have lower Coke reactivity index (CRI) Critical air blast (CAB) value Both B and C Porosity Coke reactivity index (CRI) Critical air blast (CAB) value Both B and C Porosity ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coking time in narrow by-product coke ovens is around __________ hours. 8 18 80 48 8 18 80 48 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion One kg of carbon for theoretically complete combustion requires __________ kg of air. 23 12 11.5 0.5 23 12 11.5 0.5 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion 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. None of these < 37% >71% In between 37 & 71% None of these < 37% >71% In between 37 & 71% ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Beehive coke oven Facilitates by-products recovery Takes 2-3 days for coking of coal but requires no external fuel for heating Gives larger yield of coke (around 85%) as compared to by-product ovens Produces coke with very poor strength Facilitates by-products recovery Takes 2-3 days for coking of coal but requires no external fuel for heating Gives larger yield of coke (around 85%) as compared to by-product ovens Produces coke with very poor strength ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Pick out the wrong statement. Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing None of these Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing None of these Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal ANSWER DOWNLOAD EXAMIANS APP
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