Refractory Technology Which one contains minimum percentage of SiO₂? Semi-silica Aluminous firebrick Firebrick Sillimanite Semi-silica Aluminous firebrick Firebrick Sillimanite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm² ) is __________ °C. 1000 >2000 500 >1350 1000 >2000 500 >1350 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is required in an insulating refractory? High thermal conductivity Neither A nor B Both A & B Low porosity High thermal conductivity Neither A nor B Both A & B Low porosity 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 . 250 65 150 450 250 65 150 450 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? Saw dust Cork Sand Chemically prepared foam Saw dust Cork Sand Chemically prepared foam ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silicon carbide refractories are used in the Ceramic recuperators Zinc smelting furnace Muffle furnace All of these Ceramic recuperators Zinc smelting furnace Muffle furnace All of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS