Fuels and Combustion Rate of low temperature oxidation of coal due to bad storage conditions Does not vary with increase in surface area Is accelerated by storage in large heaps with small surface to volume ratio Decreases with increase in surface area Is more for low volatile coal compared to high volatile coal Does not vary with increase in surface area Is accelerated by storage in large heaps with small surface to volume ratio Decreases with increase in surface area Is more for low volatile coal compared to high volatile coal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Stack heat losses can be minimised by 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 Maintaining proper draft in the furnace ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Efficiency of the combustion of a fuel is judged by the __________ the flue gas. Temperature of % of O₂in %of CO₂ in Colour of Temperature of % of O₂in %of CO₂ in Colour of ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis. 550 950 750 1150 550 950 750 1150 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Short/intense flame is produced during combustion of gaseous fuel by using Low amount/current of combustion air Very little excess air Preheated secondary air High amount/current of combustion air Low amount/current of combustion air Very little excess air Preheated secondary air High amount/current of combustion air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent. 6 18 12 24 6 18 12 24 ANSWER DOWNLOAD EXAMIANS APP
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