Refractory Technology Which of the following does not occur during firing/burning of refractories? Vitrification Development of stable mineral form Decrease in crushing strength Removal of water of hydration Vitrification Development of stable mineral form Decrease in crushing strength Removal of water of hydration ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractories Do not burn/oxidise, when exposed to air on heating Are not attacked by slags, as they are not wetted by melts Have extremely low thermal & electrical conductivities Do not resist temperature fluctuations Do not burn/oxidise, when exposed to air on heating Are not attacked by slags, as they are not wetted by melts Have extremely low thermal & electrical conductivities Do not resist temperature fluctuations ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dilatometer is used for the determination of __________ of refractories. Resistance to CO attack Modulus of rupture RUL Permanent linear change Resistance to CO attack Modulus of rupture RUL Permanent linear change ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a natural insulating material? Asbestos None of these Diatomaceous earth/kieselgur Vermiculite Asbestos None of these Diatomaceous earth/kieselgur Vermiculite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology silicon carbide refractories have very low Refractoriness (< 1700°C) Resistance to thermal shock None of these Thermal conductivity Refractoriness (< 1700°C) Resistance to thermal shock None of these Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractories are dried in the Sun Rotary kilns None of these Tunnel kilns Sun Rotary kilns None of these Tunnel kilns ANSWER DOWNLOAD EXAMIANS APP
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