Related Questions

Faster rate of drying of moulded refractories results in high __________ of refractories.
A Green strength
B Voids
C Shrinkage
D Both B and C
Which of the following bricks has the most close values of RUL and PCE?
A Silica bricks
B Fireclay bricks
C High alumina bricks
D Tar dolomite bricks
Test specimen for determination of refractoriness under load (RUL) of a refractory is heated in a
A Furnace employing neutral atmosphere
B Carbon resistance furnace
C Reducing atmosphere
D Furnace employing negative pressure
Refractoriness under load (RUL) is the most important property for the refractory bricks
A At the hearth bottom of the furnace on which stock is placed
B Used for furnace insulation
C Used in the roof of the furnace
D None of these
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
Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for __________ bricks.
A Fireclay
B Silica
C Dolomite
D Very low alumina
Cold crushing strength of refractories depends upon its
A Composition
B Texture
C Firing temperature
D All of the above
Magnesite refractories are generally not used in the
A Electric furnace walls
B Steel melting furnace
C Open hearth furnace
D Burning zone of cement kilns
Silicon carbide refractories are used in the
A Muffle furnace
B Zinc smelting furnace
C Ceramic recuperators
D All of the above
Carbon refractories are exclusively used in the
A Hearth of blast furnace
B Walls of coke oven
C Regenerators of coke oven
D Side wall of soaking pits

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