Furnace Technology Questions

• An example of shaft furnace is the
• In a muffle furnace, the muffle
• __________ atmosphere is maintained inside an iron blast furnace.
• Tunnel kilns are usually used for
• Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.
• In a furnace employing forced draught as compared to induced draught,
• In producer gas making furnace, steam is added along with air to mainly control the
• Which of the following is not an additive for flue gases from furnace to reduce its dew-point?
• Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of
• Large tonnage of refractory bricks are dried in a
• Which of the following is a batch furnace?
• Maximum thermal efficiency of boiler may be about __________ percent.
• An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
• Which of the following accentuates clinker-ing troubles on furnace grate burning coal?
• Rotary kilns are used in the
• Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures.
• Very high pressure boilers are usually __________ boilers.
• Which of the following is not a continuous waste heat recovery equipment from the flue gases going out of furnace?
• Heat transfer rate to the charge/stock in a furnace does not depend upon the
• In low or standard frequency induction furnace, heat is produced by the