Refractory Technology Furnace atmosphere for softening temperature determination of refractories (in which segar cones are placed) should be Neither A nor B Either A or B Oxidising Neutral Neither A nor B Either A or B Oxidising Neutral ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture? Chemically prepared foam Cork Saw dust Sand Chemically prepared foam Cork Saw dust Sand ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology __________ bricks are used in the burning zone of a cement rotary kiln. High alumina Fireclay Thoria Silicon carbide High alumina Fireclay Thoria Silicon carbide ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Segar cones are used for the determination of __________ of refractories. Electrical conductivity Spalling resistance Resistance to slag attack Softening temperature Electrical conductivity Spalling resistance Resistance to slag attack Softening temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale. Silicon carbide Chrome or magnesite Silica Lowduty fireclay Silicon carbide Chrome or magnesite Silica Lowduty fireclay ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cold crushing strength of ordinary fireclay brick is about 950 kg/cm² . On exposure to a temperature of about 1500°C, its crushing strength may come down to as low as __________ kg/cm² . 450 65 250 150 450 65 250 150 ANSWER DOWNLOAD EXAMIANS APP
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