Fuels and Combustion Increase in ash content of blast furnace coke Reduces its consumption in the furnace Decreases its hardness and abrasion resistance Does not affect its consumption in the furnace Increases its consumption in the furnace Reduces its consumption in the furnace Decreases its hardness and abrasion resistance Does not affect its consumption in the furnace Increases its consumption in the furnace ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker. 1400 1250 1100 1350 1400 1250 1100 1350 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 Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel None of these 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 Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel None of these Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal ANSWER DOWNLOAD EXAMIANS APP
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 Which of the following accentuates clinker-ing trouble on furnace grate burning coal? Low forced draught and fuel bed temperature Thick fire bed and preheated primary air All of these Low reactivity of carbonised residue containing high proportions of iron & sulphur Low forced draught and fuel bed temperature Thick fire bed and preheated primary air All of these Low reactivity of carbonised residue containing high proportions of iron & sulphur ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is not endothermic? Cracking Reforming Partial oxidation Gasification Cracking Reforming Partial oxidation Gasification ANSWER DOWNLOAD EXAMIANS APP
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