Fuels and Combustion Which of the following has the highest calorific value (kcal/Nm³) ? LPG Natural gas Gobar gas Carburetted water gas LPG Natural gas Gobar gas Carburetted water gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following would require least amount of secondary air for combustion? Semi-bituminous coal containing 25% ash and 20% volatile matter Coke breeze containing 25% ash and 2% volatile matter Bituminous coal containing 20% ash and 25% volatile matter Anthracite containing 10% volatile matter and 8% ash Semi-bituminous coal containing 25% ash and 20% volatile matter Coke breeze containing 25% ash and 2% volatile matter Bituminous coal containing 20% ash and 25% volatile matter Anthracite containing 10% volatile matter and 8% ash ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its All of these Emissivity factor is higher Sulphur content is lower Flue gas has lower dew point thereby facilitating more waste heat recovery All of these Emissivity factor is higher Sulphur content is lower Flue gas has lower dew point thereby facilitating more waste heat recovery ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Most of the coking coals are Anthracite None of these Lignite Bituminous Anthracite None of these Lignite Bituminous ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Preheating of coal charge for the coke ovens reduces the Time of carbonisation Yield of gas and tar All of these Fuel consumption in coking Time of carbonisation Yield of gas and tar All of these Fuel consumption in coking ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of Less air for combustion Too much air for combustion Pulverised coal in boilers Correct amount of air for combustion Less air for combustion Too much air for combustion Pulverised coal in boilers Correct amount of air for combustion ANSWER DOWNLOAD EXAMIANS APP
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