Fuels and Combustion Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal. Gasification Hydrogenation None of these Carbonisation Gasification Hydrogenation None of these Carbonisation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A good coking coal should have high __________ content. Moisture None of these Sulphur & phosphorus Ash Moisture None of these Sulphur & phosphorus Ash ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing? Ash disposal problem Erosion of induced draft fan blades High power consumption in its transportation Excessive fly-ash discharge from the stack Ash disposal problem Erosion of induced draft fan blades High power consumption in its transportation Excessive fly-ash discharge from the stack ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Anthracite can be used for Making carbon electrodes All of these Recarbonising steel Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke Making carbon electrodes All of these Recarbonising steel Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon None of these Requires smaller combustion space and less secondary air Is more difficult to ignite and produces a shorter flame Is less liable to spontaneous combustion on storage None of these Requires smaller combustion space and less secondary air Is more difficult to ignite and produces a shorter flame Is less liable to spontaneous combustion on storage ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C. 900-1000 1700-1800 400-500 1400-1500 900-1000 1700-1800 400-500 1400-1500 ANSWER DOWNLOAD EXAMIANS APP
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