Refractory Technology Which form of silica has the highest specific gravity? All of these Tridymite Quartz Cristobalite All of these Tridymite Quartz Cristobalite ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following bricks should not be used, if the furnace is to be used intermit-tantly? Sillimanite Silicon carbide bricks Silica bricks Firebricks Sillimanite Silicon carbide bricks Silica bricks Firebricks ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Porosity is induced in insulating refractories by adding All of these Ammonium chloride/sulphate Calcium phosphate Powdered naphthalene All of these Ammonium chloride/sulphate Calcium phosphate Powdered naphthalene ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Dilatometer is used for the determination of __________ of refractories. Modulus of rupture RUL Permanent linear change Resistance to CO attack Modulus of rupture RUL Permanent linear change Resistance to CO attack ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of Insulating bricks Crucibles used for melting of high purity metals Segar cones Muffles for muffle furnaces Insulating bricks Crucibles used for melting of high purity metals Segar cones Muffles for muffle furnaces ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness/fusion points of 'superduty' refractories is __________ °C. > 1730 1630-1670 1520-1630 > 2000 > 1730 1630-1670 1520-1630 > 2000 ANSWER DOWNLOAD EXAMIANS APP
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