ORDERING OF SENTENCES QUIZ

Fireclay refractories

All of these

Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc

Shrink during firing

Are not resistant to the action of basic slags

TRUE ANSWER : ?
YOUR ANSWER : ?

Magnesite refractories have low resistance to

Disintegration on sudden change of temperature

Attack by basic slag

Both B and C

Abrasion

TRUE ANSWER : ?
YOUR ANSWER : ?

Which is a basic refractory?

Fireclay

Chrome magnesite

Silica

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Hollow refractory bricks are made by

Slip casting

Extrusion

Pressing/machine moulding

Hand moulding

TRUE ANSWER : ?
YOUR ANSWER : ?

Chrome magnesite is not used in the

All of these

Inner lining of L.D. converter

Aluminium melting furnaces

Wear out lining of steel melting furnaces

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ is not a single oxiderefractory.

None of these

Magnesia

Zirconia

Silicon carbide

TRUE ANSWER : ?
YOUR ANSWER : ?

Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale.

Lowduty fireclay

Silicon carbide

Silica

Chrome or magnesite

TRUE ANSWER : ?
YOUR ANSWER : ?

Which is not an acidic refractory?

Silica

Fireclay

High alumina refractory

Carbon black

TRUE ANSWER : ?
YOUR ANSWER : ?

Thermal spalling mainly occurs during __________ of furnaces.

Cooling down

Both A & B

Neither A nor B

Warming up

TRUE ANSWER : ?
YOUR ANSWER : ?

Grog

Contains both alumina and silica

Is a non-plastic material

Iscrushed firebrick

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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