Refractory Technology Chromite refractories are used in Neither A nor B Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other Both A & B Bottom of soaking pits Neither A nor B Between acid & basic linings in basic open hearth furnaces to prevent their chemical action with each other Both A & B Bottom of soaking pits ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C. 770 570 270 70 770 570 270 70 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology A steel member used in the furnace construction to take the thrust of the brickwork is called Buckstay Breast wall Baffle Armouring Buckstay Breast wall Baffle Armouring ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns. 2700 1800 2200 2400 2700 1800 2200 2400 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Presence of MgO in alumino-silicate refractories __________ its refractoriness. Lowers Does not affect Increases Either A or B; depends on its quantity Lowers Does not affect Increases Either A or B; depends on its quantity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity of fireclay refractories is __________ percent. 43961 25-35 35-50 44129 43961 25-35 35-50 44129 ANSWER DOWNLOAD EXAMIANS APP
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