A. Hearth of blast furnace
B. Walls of coke oven
C. Regenerators of coke oven
D. Side wall of soaking pits
Carbon refractories are exclusively used in the_________________? Read More »
Refractory Technology A. Refractoriness (< 1700°C)
B. Thermal conductivity
C. Resistance to thermal shock
D. None of these
Silicon carbide refractories have very low ___________________? Read More »
Refractory Technology A. Producing monolithic linings
B. Patch work
C. Minimising the number of joints in the structure
D. All A., B. and C.
Refractory castables are used for__________________? Read More »
Refractory Technology A. Graphite
B. Fireclay
C. Alumina
D. Zircon
Which of the following has the lowest electrical resistivity ? Read More »
Refractory Technology A. 2-3
B. 5-7
C. 7-12
D. 14-20
A. High alumina
B. Fireclay
C. Thoria
D. Silicon carbide
______________ bricks are used in the burning zone of a cement rotary kiln ? Read More »
Refractory Technology A. Inner lining of L.D. converter
B. Aluminium melting furnaces
C. Wear out lining of steel melting furnaces
D. All A., and B. and C.
Chrome magnesite is not used in the ____________________? Read More »
Refractory Technology A. Fireclay
B. Silica
C. Magnesite
D. Corundum
A. Softening
B. Fracture due to uneven expansion at high temperature
C. Resistance to compressive loads
D. Resistance to chemical action of gases and molten fluxes
Spalling of a refractory means its____________________? Read More »
Refractory Technology A. Fireclay
B. Carbon
C. 85% alumina
D. Corundum
Bauxite calcining rotary kilns are lined with ________________ bricks? Read More »
Refractory Technology