Related Questions

The main function of a muffle in the muffle furnace is to
A Protect the charge from the effects of the products of combustion
B Smooth out temperature inequalities on the combustion side of the muffle wall
C Both A & B
D Neither A nor B
In a muffle furnace, the muffle
A Retards the heat transfer
B Assists in temperature equalisation in the charge
C Permits the use of controlled atmosphere for the protection of stock
D All of the above
Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns.
A 1800
B 2200
C 2400
D 2700
The heating capacity of continuous reheating furnace depends upon the
A Hearth area and furnace temperature
B Emissivity of the stock
C Ratio of wall surface to stock surface
D All of the above
Which furnace employs an I.D. fan for the removal of flue gases from the furnace?
A Coke oven
B Blast furnace stoves
C Beehive coke oven
D High pressure boiler
Black smoke coming out of the chimney of a furnace is an indication of the use of __________ in the furnace.
A Low amount of excess combustion air
B Large quantity of excess combustion air
C Hydrocarbon fuel
D Pulverised coal as fuel
The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace.
A Arc
B Resistance
C Low frequency induction
D High frequency induction
An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
A Resistance
B Arc
C Low frequency induction
D None of these
An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.
A Walking beam
B Shaft
C Tunnel
D Rotary hearth
__________ furnace is not an electric furnace.
A Arc
B Induction
C Pot
D Resistance

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