Fuels and Combustion The weathering index of a coal Gives an idea of the fusion temperature of ash Is related to its calorific value Is a measure of its size stability, when stored & exposed to weather Is a measure of its caking tendency Gives an idea of the fusion temperature of ash Is related to its calorific value Is a measure of its size stability, when stored & exposed to weather Is a measure of its caking tendency ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm³ gas ? Natural gas Producer gas Blast furnace gas Water gas Natural gas Producer gas Blast furnace gas Water gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Prime coking coal is always blended with medium or non- coking coal before ear-bonisation To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls Neither A nor B Because, it alone produces unreactive coke Both A & B To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls Neither A nor B Because, it alone produces unreactive coke Both A & B ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Gray King Assay and Swelling Index of a coal is a measure of its Abradability Swelling characteristics Resistance to impact breakage Agglutinating properties Abradability Swelling characteristics Resistance to impact breakage Agglutinating properties ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Preheating of a gaseous fuel results in increased Quantity of flue gas Ignition temperature Flame length Flame temperature Quantity of flue gas Ignition temperature Flame length Flame temperature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High sulphur content in a fuel __________ of the flue gases. Decreases the dew point Reduces the combustion efficiency by limiting the permissible temperature reduction Both B & C Increases the dew point Decreases the dew point Reduces the combustion efficiency by limiting the permissible temperature reduction Both B & C Increases the dew point ANSWER DOWNLOAD EXAMIANS APP
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