Fuels and Combustion In general, the limit of inflammability/explosion limit of fuel gases is widened by the Increase in temperature (i.e. preheating) Increase in gas pressure All of these Use of pure oxygen for combustion instead of air Increase in temperature (i.e. preheating) Increase in gas pressure All of these Use of pure oxygen for combustion instead of air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will Increase or decrease depending on the fuel type Decrease Increase Not change Increase or decrease depending on the fuel type Decrease Increase Not change 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. In between 37 & 71% < 37% >71% None of these In between 37 & 71% < 37% >71% None of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to Make it look attractive Avoid radiation heat loss None of these Minimise its corrosion Make it look attractive Avoid radiation heat loss None of these Minimise its corrosion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During combustion of coal on grate, clinker formation is increased by the Low fusion point of ash (< 1100° C) Use of preheated primary air All of these Use of thick fire bed Low fusion point of ash (< 1100° C) Use of preheated primary air All of these Use of thick fire bed 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. 1350 1250 1100 1400 1350 1250 1100 1400 ANSWER DOWNLOAD EXAMIANS APP
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