Cermets are combination of ceramic and metallic materials due to which they have high strength & resistance to high temperature. Cermets are used in the

Firing temperature of magnesite bricks is about __________ °C.

Maximum alumina content in high alumina refractory can be as high as __________ percent.

Magnesite refractories are used for the construction of those furnaces, which are

Which is not a basic refractory ?

Thoria

Hot metal runner in blast furnace are lined with __________ bricks.

Hollow refractory bricks are made by

Roof of a basic electric furnace is made of __________ bricks.

Which property of refractories is the most important for top section of the blast furnace?

Spray test determines the __________ of refractories.

Quartz is

An indication of degree of firing in silica brick is its

High density refractory bricks have lower

Cold crushing strength of refractories depends upon its

Periclase is

Maximum water percentage in refractory mix meant for hand moulding may be as high as __________ percent.

Si percentage in silica refractories used in the walls of coke oven is about

Bottom of basic open hearth furnace are constructed of

Silliminite (Al₂O₃.SiO₂) refractory, which is a neutral refractory, is not used in

Tar bonded dolomite bricks

Which of the following is not a neutral refractory ?

Fireclay bricks are never used in the

Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material?

Which form of silica has the highest specific gravity ?

Refractories used in/for __________ should have low thermal conductivity.

Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of __________ percent respectively.

Which is not a high alumina refractory ?

Zircon refractories have

Cermets are