11. Which of the following is a heat treatment furnace?
12. The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace.
13. An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
14. Calcination of limestone to produce lime is done in a __________ kiln.
15. Pot furnace which is either regenerative or recupterative, is used in the manufacture of
16. Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by
17. The heating capacity of muffle furnace depends on the
18. Fuel economy in an industrial furnace operation can not be achieved by the use of
19. Oxygen enrichment of combustion air does not result in increase of the
20. Size of the combustion chamber of a furnace depends upon the
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