REFRACTORY TECHNOLOGY QUIZ

Periclase is

MgCO₃

Crystalline form of MgO

Amorphous magnesite

ZrSO₄

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Carborundum

High alumina

Superduty fireclay

Silica

TRUE ANSWER : ?
YOUR ANSWER : ?

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

None of these

Density

Thermal conductivity

Specific heat

TRUE ANSWER : ?
YOUR ANSWER : ?

Outer combustion chamber of blast furnace stove is lined with __________ bricks.

Chrome magnesite

Silica

Fireclay

Zirconia

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ nozzles are used in continuous casting of steel,

Beryllia

Carborundum

Zircon

Thoria

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Soaking pit

Coke ovens

Blastfurnace

L.D. converter

TRUE ANSWER : ?
YOUR ANSWER : ?

Porosity is induced in insulating refractories by adding

Powdered naphthalene

Calcium phosphate

All of these

Ammonium chloride/sulphate

TRUE ANSWER : ?
YOUR ANSWER : ?

Alumina-graphite bricks are used for lining the

Both A & B

Slide gate in teeming laddies

Neither A nor B

Continuous casting systems

TRUE ANSWER : ?
YOUR ANSWER : ?

With increase in the density of silica refractories, its

Both A & B

Neither A nor B

Spalling resistance reduces

Resistance to slag attack increases

TRUE ANSWER : ?
YOUR ANSWER : ?

Roof of a basic open hearth furnace is lined with __________ bricks.

Dolomite

Fireclay

Silica

Magnesite

TRUE ANSWER : ?
YOUR ANSWER : ?

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