1. high calorific value
2. produce minimum smoke and gases
3. ease in storing
4. high ignition point
high ignition point
1. causing clinkering and slagging
2. corroding air heaters
3. spontaneous combustion during coal storage
4. all of the above
all of the above
1. form lumps or masses of coke
2. burn freely
3. show little or no fusing action
4. burn completely
form lumps or masses of coke
1. heated sufficiently
2. burnt in excess air
3. heated to its ignition point
4. burnt as powder
heated to its ignition point
1. various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume
2. various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight
3. fuel constituents as percent by volume of moisture, volatile, fixed carbon and ash
4. fuel constituents as percent by weight of moisture, volatile, fixed carbon and ash
various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight
1. various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume
2. various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight
3. fuel constituents as percent by volume of moisture, volatile, fixed carbon and ash
4. fuel constituents as percent by weight of moisture, volatile, fixed carbon and ash
fuel constituents as percent by weight of moisture, volatile, fixed carbon and ash
1. provide air around burners for obtaining optimum combustion
2. transport and dry the coal
3. cool the scanners
4. supply air for seigniors
supply air for seigniors
1. same value
2. higher value
3. lower value
4. lower/higher depending on steam flow
higher value
1. high burning rate is possible
2. heat release can be easily controlled
3. fuel burns economically
4. it is the best technique for burning high ash content fuel having low fusion ash
it is the best technique for burning high ash content fuel having low fusion ash
1. temperature, time, and turbulence
2. total air, true fuel, and turbulence
3. thorough mixing, total air, and temperature
4. total air, time, and temperature
temperature, time, and turbulence