Category: Refractory Technology

A. Bakelite impregnated or fused periclase
B. Silica
C. Semi-silica
D. Fireclay

A. Al2O3. 2SiO2
B. 3Al2O3. 2SiO2
C. Al2O3. SiO2
D. 2Al2O3. 3SiO2

A. Pottery furnace
B. Glass melting furnace
C. Crucibles
D. Gas retorts

A. Fireclay
B. Silica
C. Magnesite
D. Corundum

A. Beehive coke ovens
B. By-product coke ovens
C. Dome of blast furnace stoves
D. Roof of open hearth furnace

A. Less shrinkage in heating, decreased apparent porosity & increased specific gravity
B. High strength & thermal spalling resistance
C. Less addition of water to get a workable plasticity & lesser time required for drying the raw
refractories and hence increased rate of production
D. All A., B. and C.

A. Light buff to reddish buff
B. Yellow
C. Black
D. None of these

A. Thermal insulation
B. Transformers
C. Magnetic switches
D. Television sets

A. 1800
B. 2200
C. 2400
D. 2700

A. A ceramic material which becomes fluid upon heating and can be moulded in liquid/viscous
state is termed s glass
B. Ceramic materials do not undergo vitrification on heating
C. Ceramic materials are brittle in nature
D. Non-oxide ceramic materials generally act as a semi-conductor