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. In between 37 & 71% >71% < 37% None of these In between 37 & 71% >71% < 37% None of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Percentage of methane in coke oven gas may be around 15 5 25 50 15 5 25 50 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent. 10 & 20 15 & 8 10 & 3 3 & 10 10 & 20 15 & 8 10 & 3 3 & 10 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent. 15 to 25 75 55 to 75 35 to 45 15 to 25 75 55 to 75 35 to 45 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion C.V. (kcal/Nm³) of gaseous fuels __________ with increase in molecular weight. Remains constant Decreases Increases May increase or decrease, depends on combustibles Remains constant Decreases Increases May increase or decrease, depends on combustibles ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Pick out the wrong statement. None of these 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 Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal None of these 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 Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal ANSWER DOWNLOAD EXAMIANS APP
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