Refractory Technology Semi-silica bricks compared to silica bricks have Better spalling resistance Less fusion point Neither A nor B Both A & B Better spalling resistance Less fusion point Neither A nor B Both A & B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology An indication of degree of firing in silica brick is its None of these Specific gravity Fusion point RUL None of these Specific gravity Fusion point RUL ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Resistance to slag attack of a refractory Decreases, if defective joints & cracks exist in the refractory Decreases at higher temperature Depends on the nature of slag & refractory All of these Decreases, if defective joints & cracks exist in the refractory Decreases at higher temperature Depends on the nature of slag & refractory All of these 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? Saw dust Cork Sand Chemically prepared foam Saw dust Cork Sand Chemically prepared foam ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Test piece for determination of RUL of a refractory is heated in a/an Neutral atmosphere Reducing atmosphere Oxidising atmosphere Electric furnace Neutral atmosphere Reducing atmosphere Oxidising atmosphere Electric furnace ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity). Chromite Graphite Carborundum Fireclay Chromite Graphite Carborundum Fireclay ANSWER DOWNLOAD EXAMIANS APP
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