Refractory Technology Which is required in an insulating refractory? Neither A nor B Low porosity High thermal conductivity Both A & B Neither A nor B Low porosity High thermal conductivity Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not an alumino-silicate refractory? Mullite bricks Fireclay bricks Tar dolomite bricks High alumina bricks Mullite bricks Fireclay bricks Tar dolomite bricks High alumina bricks 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 Sand Chemically prepared foam Cork Saw dust Sand Chemically prepared foam Cork 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 . 450 250 150 65 450 250 150 65 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Pyrometric cone equivalent (PCE) value (Segar cone) of 'superduty refractories' is more than 33 which corresponds to a temperature of __________ °C. 1730 1670 1520 1630 1730 1670 1520 1630 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractory bricks having lower porosity have Low thermal conductivity Greater strength High insulating properties Low heat capacity Low thermal conductivity Greater strength High insulating properties Low heat capacity ANSWER DOWNLOAD EXAMIANS APP