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.Management Sciences
Category: Refractory Technology
Insulating refractories should have_______________?
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A. High porosity
B. Low thermal conductivity
C. Both A. and B.
D. Neither A. not B.
Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant ?
A. Soaking pits
B. Reheating furnace
C. L.D. converter
D. Rotary lime kiln
Test piece for determination of RUL of a refractory is heated in a/an____________________?
A. Oxidising atmosphere
B. Reducing atmosphere
C. Electric furnace
D. Neutral atmosphere
Refractories are dried in the _______________?
A. Rotary kilns
B. Tunnel kilns
C. Sun
D. None of these
Grog__________________?
A. Contains both alumina and silica
B. Is crushed firebrick
C. Is a non-plastic material
D. All A., B. and C.
The largest consumer of refractories is the _______________ industry?
A. Cement
B. Metallurgical
C. Fertiliser
D. Power
Furnace atmosphere for softening temperature determination of refractories (in which Seger Cones are placed) should be __________________?
A. Oxidising
B. Neutral
C. Either A. or B.
D. Neither A. nor B.
High alumina refractories are used in the ___________________?
A. Dome of blast furnace stoves
B. Electric arc furnace roof
C. Glass melting furnaces
D. All A., B. and C.
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