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