Related Questions

Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for __________ bricks.
A Fireclay
B Silica
C Dolomite
D Very low alumina
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
A red house is built from red bricks . A blue house is built from blue bricks. A white house is built from white bricks. Then what is a greenhouse made from ?
A green bricks
B wood
C glass
D steel
The solid brick shown is made of small square shaped bricks of side 1. when the large brick is disassembled into its component small bricks. the total surface area of all the small bricks is how much greater than the surface area of the large brick?
A 32
B 40
C 60
D 72
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
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
RUL of refractories depends on the
A Chemical composition
B Physical structure
C Presence of impurities like iron & alkali
D All of the above
Pyrometric cone equivalent (PCE) of a refractory is the measure of its
A Spalling resistance
B Fusion point
C Resistance to slag penetration
D Resistance to carbon monoxide attack
A courtyard 25 m long and 16 m broad is to be paved with bricks of dimensions 20 cm by 10 cm. The total number of bricks required is
A 25000
B 20000
C 18000
D None of these
A will will 8m long, and 22.5 cm thick is made of bricks, each measuring 25 cm X 11.5 cm X 6cm. The numbe of bricks will be required to surround the plot?
A 21
B 22
C 23
D 24

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