Refractory Technology Porosity is induced in insulating refractories by adding Ammonium chloride/sulphate All of these Powdered naphthalene Calcium phosphate Ammonium chloride/sulphate All of these Powdered naphthalene Calcium phosphate ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture? Sand Cork Saw dust Chemically prepared foam Sand Cork Saw dust Chemically prepared foam ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Ferromagnetic ceramic material is not used in the Magnetic switches Thermal insulation Television sets Transformers Magnetic switches Thermal insulation Television sets Transformers ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractory Can not be used as an insulator Is produced from baddeleyite Does not react with basic slags Has poor electrical conductivity at high temperature Can not be used as an insulator Is produced from baddeleyite Does not react with basic slags Has poor electrical conductivity at high temperature ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology silicon carbide refractories have very low None of these Thermal conductivity Refractoriness (< 1700°C) Resistance to thermal shock None of these Thermal conductivity Refractoriness (< 1700°C) Resistance to thermal shock ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology High density refractory bricks have lower Slag penetration resistance Spalling resistance Fusion point Thermal conductivity Slag penetration resistance Spalling resistance Fusion point Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
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