Related Questions

Semi-silica bricks compared to silica bricks have
A Less fusion point
B Better spalling resistance
C Both A & B
D Neither A nor B
An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?
A Cork
B Saw dust
C Sand
D Chemically prepared foam
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
Maximum apparent porosity of magnesite bricks is about __________ percent.
A 8
B 24
C 44
D 58
The maximum linear expansion of silica bricks during firing is about __________ percent.
A 0.5
B 1
C 2
D 3.5
Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C.
A 770
B 570
C 270
D 70
Refractory bricks having lower porosity have
A High insulating properties
B Low heat capacity
C Low thermal conductivity
D Greater strength
High porosity refractory bricks have
A Poor resistance to the peneration of molten slag, metal & flue gases
B Poor heat conductivity & low strength
C Better thermal spalling resistance
D All of the above
Silica bricks are never used for lining the
A Beehive coke ovens
B By-product coke ovens
C Dome of blast furnace stoves
D Roof of open hearth furnace

Next steps