Refractory Technology Which of the following has the lowest electrical resistivity? Alumina Zircon Fireclay Graphite Alumina Zircon Fireclay Graphite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Crushing strength of a refractory 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 Decreases with rise in service temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness/fusion points of 'superduty' refractories is __________ °C. 1630-1670 > 1730 1520-1630 > 2000 1630-1670 > 1730 1520-1630 > 2000 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal diffusivity of a refractory brick is high, when its __________ is high. Specific heat Thermal conductivity Density None of these Specific heat Thermal conductivity Density None of these ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Conversion of silica mineral to cristobalite is accompanied by reduction in its Both A & B Specific gravity Volume Neither A nor B Both A & B Specific gravity Volume Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Chromite refractories are used in 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 Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
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