Furnace Technology Turn down ratio of a burner Should be 1:1 for a batch type furnace. Should be as low as possible i.e., 1 : 2 Is normally much more for a continuous furnace as compared to a batch furnace Is the ratio of maximum to minimum permissible heat input rates Should be 1:1 for a batch type furnace. Should be as low as possible i.e., 1 : 2 Is normally much more for a continuous furnace as compared to a batch furnace Is the ratio of maximum to minimum permissible heat input rates ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace. Arc High frequency induction Resistance Low frequency induction Arc High frequency induction Resistance Low frequency induction ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology Very high pressure boilers are usually __________ boilers. Waste heat Fire tube Natural circulation Water tube Waste heat Fire tube Natural circulation Water tube ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology The purpose of controlling the furnace atmosphere is to prevent surface attack by Sulphur penetration Either of the above Decarburising Oxidation/scaling Sulphur penetration Either of the above Decarburising Oxidation/scaling ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology Heat transfer rate to the stock/charge in the furnace does not depend upon the Emissivity of the refactory walls Use of waste heat recovery equipments Size of the furance Thickness of the stock Emissivity of the refactory walls Use of waste heat recovery equipments Size of the furance Thickness of the stock ANSWER DOWNLOAD EXAMIANS APP
Furnace Technology In a muffle furnace, the muffle Permits the use of controlled atmosphere for the protection of stock All of these Assists in temperature equalisation in the charge Retards the heat transfer Permits the use of controlled atmosphere for the protection of stock All of these Assists in temperature equalisation in the charge Retards the heat transfer ANSWER DOWNLOAD EXAMIANS APP
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