Refractory Technology Roof of a basic open hearth furnace is lined with __________ bricks. Dolomite Fireclay Silica Magnesite Dolomite Fireclay Silica Magnesite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology SiO₂ percentage in firebrick is about >94 35-40 55-60 80-85 >94 35-40 55-60 80-85 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which form of silica has the highest specific gravity? Quartz Cristobalite All of these Tridymite Quartz Cristobalite All of these Tridymite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Basic bricks are not made of Fireclay Foresterite Magnesite Chromite Fireclay Foresterite Magnesite Chromite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Highest melting (m.p = 3070°C) oxide refractory is Zirconia Alumina Magnesia Thoria Zirconia Alumina Magnesia Thoria ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Crushing strength of a refractory Decreases with rise in service temperature Increases with rise in service temperature Is unaffected with change in service temperature Decreases with increase in porosity Decreases with rise in service temperature Increases with rise in service temperature Is unaffected with change in service temperature Decreases with increase in porosity ANSWER DOWNLOAD EXAMIANS APP
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