Refractory Technology Presence of MgO in alumino-silicate refractories __________ its refractoriness. Lowers Either A or B; depends on its quantity Increases Does not affect Lowers Either A or B; depends on its quantity Increases Does not affect ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fusion point of a basic refractory material is Reduced by the addition of acid oxides Increased by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides Reduced by the addition of acid oxides Increased by the addition of acid oxides Always less than 1000°C Not affected by the addition of acid oxides ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which is not a natural insulating material? None of these Vermiculite Asbestos Diatomaceous earth/kieselgur None of these Vermiculite Asbestos Diatomaceous earth/kieselgur ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractories are not used in High frequency induction furnaces in the form of inductors Lining high temperature ceramic kilns Furnaces subjected to fluctuating temperature Making sheaths for thermocouple High frequency induction furnaces in the form of inductors Lining high temperature ceramic kilns Furnaces subjected to fluctuating temperature Making sheaths for thermocouple ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica refractories are not used in Dome and upper portion of B.F. stoves Beehive coke ovens Open hearth furnace roof Coke oven walls Dome and upper portion of B.F. stoves Beehive coke ovens Open hearth furnace roof Coke oven walls ANSWER DOWNLOAD EXAMIANS APP
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