Fuels and Combustion Which will have the least volatile matter and hence will be the most difficult to ignite? Bituminous coal Aanthracite Semi-bituminous coal Coke Bituminous coal Aanthracite Semi-bituminous coal Coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion If oxygen content in the flue gas rises too high, fuel is being wasted by Moisture loss None of these Dry gas/stack gas loss Incomplete combustion Moisture loss None of these Dry gas/stack gas loss Incomplete combustion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Stack heat losses can be minimised by Maintaining proper draft in the furnace Oxygen enrichment of combustion air Using low c.v. fuels Controlling the excess air Maintaining proper draft in the furnace Oxygen enrichment of combustion air Using low c.v. fuels Controlling the excess air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion For every 10% increase in the excess air; the fuel consumption increases by __________ percent. 0.1 2 5 10 0.1 2 5 10 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Main use of hard coke produced by high temperature carbonisation is in the Sinter making Cupola in foundaries Iron blast furnace Domestic ovens Sinter making Cupola in foundaries Iron blast furnace Domestic ovens ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ratio of primary air to secondary air increases with increase in the rank of coal, because the High rank coals have higher amount of volatile matter Ratio of fixed carbon to volatile matter increases Calorific value of the coal increases Oxygen content progressively decreases High rank coals have higher amount of volatile matter Ratio of fixed carbon to volatile matter increases Calorific value of the coal increases Oxygen content progressively decreases ANSWER DOWNLOAD EXAMIANS APP
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