Which furnace consumes maximum refractory annually in an integrated steel plant ?

Use of higher percentage of lime for bonding silica bricks, reduces their

Magnesite refractories have low resistance to

Highest melting (m.p = 3070°C) oxide refractory is

Maximum apparent porosity of magnesite bricks is about __________ percent.

Which brick undergoes maximum shrinkage on drying ?

The main raw material for manufacture of silicon carbide refractories is

Fireclay bricks are used in the

Lower part of hot metal mixer are lined with __________ bricks.

Grog addition in fireclay during brick manufacture is done to

Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves ?

Chrome magnesite brick is not used for lining the

Which one contains minimum percentage of SiO₂?

Dilatometer is used for the determination of __________ of refractories.

Which is the stable form of silica upto 1470°C ?

Chromite refractories are used in

Carbon refractories have very high

Pick out the wrong statement.

The maximum linear expansion of silica bricks during firing is about __________ percent.

With decrease in porosity, the __________ of the refractories decreases.

Hot face insulating linings of high purity alumina fused mullite are used, where

Which of the following has the lowest electrical resistivity ?

Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory

Silica bricks have low spalling resistance below 600°C, due to its

Thermal diffusivity of a refractory brick is high, when its __________ is high.

Which one expands on heating ?

High porosity refractory bricks have

Walls, roofs & combustion chambers of annealing furnaces are made of __________ bricks.

Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C.

Panel test determines the __________ of refractories.