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should be paved should be cleaned should be dismantled should be welded
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hell place of great heat and fire furnace for smelting iron fireball
water-tube fire-tube exhaust gas None of the above is true
help preheat the air for the furnaces help preheat the feedwater protect economizer from excessive heat prevent excessive furnace heat losses
hell place of great heat and fire furnace for smelting iron fireball
blow clean scavenge purge
air or water in the furnace combustion pulses fuel oil pump failure flame failure
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cyclone furnace boiler type dry back boiler type water-tube type critical circulation boiler type
Vaporize metal atoms to be analyzed Cause the metal species to form carbides which are more volatile Convert the graphite furnace to ash to avoid carbide formation Burn off organic species that would interfere with the elemental analysis
cool the furnace to prevent pre-ignition remove explosive vapors from the furnace evaporate accumulated unburned fuel oil provide sufficient air in the furnace to allow ignition of the fuel
extended emphasized distorted illustrated
filled with water purged cleared of air None of the above is true
relight the boiler immediately to prevent loss of steam pressure relight the fire off the brickwork as the bricks are cherry red purge the furnace of any combustible gases before attempting to relight the fire speed up the feed pump to prevent dry firing when the burner flame is reestablished
paved cleaned welded dismantled
hell place of great heat and fire furnace for smelting iron fireball
extended emphasized distorted illustrated
It directed air at melted iron in a furnace, removing all impurities. It slowly heated iron ore then stirred it and heated it again. It changed iron ore into iron which was a substitute for steel. It could quickly find deposits of iron ore under the ground.
proper combustion water in the fuel excess air cold fuel oil
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