Refractory Technology Si percentage in silica refractories used in the walls of coke oven is about 45 60 95 80 45 60 95 80 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Natural silica Is not stable at high temperature Mainly contains quartz All of these Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes Is not stable at high temperature Mainly contains quartz All of these Transforms to other allotropic forms i.e tridymite and cristoballite involving very high volume changes ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chemically, mullite refractories is ThO₂ ZrSO₄ 3Al2O₃.2SiO₂ Al2O₃ ThO₂ ZrSO₄ 3Al2O₃.2SiO₂ Al2O₃ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Mixing of ground refractory material and water is done in a __________ mill. Pug Tube Ball Rod Pug Tube Ball Rod ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Test piece for determination of RUL of a refractory is heated in a/an Neutral atmosphere Oxidising atmosphere Reducing atmosphere Electric furnace Neutral atmosphere Oxidising atmosphere Reducing atmosphere Electric furnace ANSWER DOWNLOAD EXAMIANS APP
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
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