Refractory Technology Thermal spalling mainly occurs during __________ of furnaces. Cooling down Both A & B Neither A nor B Warming up Cooling down Both A & B Neither A nor B Warming up ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Test piece for determination of RUL of a refractory is heated in a/an Electric furnace Oxidising atmosphere Reducing atmosphere Neutral atmosphere Electric furnace Oxidising atmosphere Reducing atmosphere Neutral atmosphere ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling tendency of refractories is reduced by increasing its Specific gravity Thermal conductivity Strength Porosity Specific gravity Thermal conductivity Strength Porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Sillimanite is a __________ refractory. Neutral High alumina Basic Insulating Neutral High alumina Basic Insulating ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Cermets are combination of ceramic and metallic materials due to which they have high strength & resistance to high temperature. Cermets are used in the Nuclear reactors, missiles & space crafts Hearth of the blast furnace Roof of electric furnaces Insulation of high temperature furnaces Nuclear reactors, missiles & space crafts Hearth of the blast furnace Roof of electric furnaces Insulation of high temperature furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Semi-silica bricks compared to silica bricks have Better spalling resistance Neither A nor B Both A & B Less fusion point Better spalling resistance Neither A nor B Both A & B Less fusion point ANSWER DOWNLOAD EXAMIANS APP
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