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 Both A & B Because, it alone produces unreactive coke Neither A nor B To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls Both A & B Because, it alone produces unreactive coke Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Bomb calorimeter is used for the determination of calorific value of the __________ fuels. Both B and C Liquid Gaseous Solid Both B and C Liquid Gaseous Solid ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The heat of combustion of a fuel Can't be known without calculating it Is always positive Is equal to the heat of formation Is always negative Can't be known without calculating it Is always positive Is equal to the heat of formation Is always negative ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During combustion of gaseous fuels, deficiency of air Does not affect the flame length Tends to shorten the flame Increases the flame temperature Lengthens the flame Does not affect the flame length Tends to shorten the flame Increases the flame temperature Lengthens the flame ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion As the C/H ratio of the fuel increases, the amount of CO₂ formed on combustion __________ for the same percentage of excess air. Remains same May increase or decrease depending on the type of fuel Decreases Increases Remains same May increase or decrease depending on the type of fuel Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coal is pulverised before burning in large capacity boiler furnaces mainly to Enhance its calorific value Facilitate easy ash removal Provide trouble free operation Ensure its complete combustion Enhance its calorific value Facilitate easy ash removal Provide trouble free operation Ensure its complete combustion ANSWER DOWNLOAD EXAMIANS APP
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