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 Thermal spalling mainly occurs during __________ of furnaces. Cooling down Warming up Both A & B Neither A nor B Cooling down Warming up Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Hollow refractory bricks are made by Pressing/machine moulding Slip casting Hand moulding Extrusion Pressing/machine moulding Slip casting Hand moulding Extrusion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology To resist spalling tendency, a refractory should have Greater diffusivity Low specific heat All of these Low thermal co-efficient of expansion Greater diffusivity Low specific heat All of these Low thermal co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Resistance to slag attack of a refractory Decreases, if defective joints & cracks exist in the refractory Depends on the nature of slag & refractory All of these Decreases at higher temperature Decreases, if defective joints & cracks exist in the refractory Depends on the nature of slag & refractory All of these Decreases at higher temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cold crushing strength of fireclay bricks is about __________ kgf/cm². 200-400 50-100 500-1000 100-150 200-400 50-100 500-1000 100-150 ANSWER DOWNLOAD EXAMIANS APP
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