Fireclay bricks are not used in the_________________?
Answer: Wall of coke oven
Which form of silica has the highest specific gravity ?
Thermal conductivity of refractory bricks____________________?
Answer: Increases with decrease in porosity
Magnesite refractories are generally not used in the__________________?
Answer: Steel melting furnace
Which is not an acidic refractory ?
Which is a neutral refractory ?
Which is an acidic refractory ?
In panel test for spalling resistance, the average face temperature of panel assembly is maintained at _____________ °C for 24 hours?
Fireclay bricks is not used for lining the_______________?
Answer: Bottom of hot metal mixer
Silica bricks are never used for lining the_________________?
Answer: Beehive coke ovens
Refractory bricks having lower porosity have _____________________?
Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of ________________?
Pure oxide refractories are generally monocrystalline in nature and are self bonded ______________ bricks are generally used as moderator in nuclear reactors?
Answer: All A., B. and C.
With increase in the porosity, thermal spalling resistance of fireclay brick_______________?
Refractoriness/fusion points of ‘Superduty’ refractories is _____________ °C?
Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called_________________?
Answer: Spalling resistance
Permeability of bricks is a measure of the___________________?
Answer: Rate at which a fluid will pass through the pores
Carborundum used for making crucibles for melting non-ferrous metals is chemically________________?