Related Questions

In order to maintain a reducing atmosphere in a furnace, it should have
A No O2 in flue gas
B CO in flue gas
C High excess air
D None of these
__________ bricks should not be used in oxidising atmosphere.
A Tar dolomite
B Carbon
C Silica
D Fireclay
An oxidising agent is a
A An electron acceptor
B An electron donor
C In a chemical reaction its oxidation number increases
D It releases H2 in a chemical reaction
An oxidising process used for aluminium and magnesium articles is called
A Galvanizing
B Anodizing
C Parkerising
D Sherardizing
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
Furnace atmosphere for softening temperature determination of refractories (in which segar cones are placed) should be
A Oxidising
B Neutral
C Either A or B
D Neither A nor B
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

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