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? Saw dust Chemically prepared foam Cork Sand Saw dust Chemically prepared foam Cork Sand ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology With increase in the alumina content in firebricks, its fusion point (refractoriness) Remains unchanged Increases Decreases linearly Decreases Remains unchanged Increases Decreases linearly Decreases ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which one contains maximum percentage of Al2O₃ ? Firebrick Magnesite Aluminous firebrick Sillimanite Firebrick Magnesite Aluminous firebrick Sillimanite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Carbon refractories have very high Wetting characteristics Refractoriness Both B and C Thermal conductivity Wetting characteristics Refractoriness Both B and C Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory Mortars None of these Castables Cements Mortars None of these Castables Cements ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Basic bricks are not made of Fireclay Magnesite Chromite Foresterite Fireclay Magnesite Chromite Foresterite ANSWER DOWNLOAD EXAMIANS APP
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