Refractory Technology Pyrometric cone equivalent (PCE) value (Segar cone) of 'superduty refractories' is more than 33 which corresponds to a temperature of __________ °C. 1630 1730 1520 1670 1630 1730 1520 1670 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Silica bricks have low spalling resistance below 600°C, due to its Very high thermal conductivity Low refractoriness High co-efficient of expansion upto this temperature High thermal diffusivity Very high thermal conductivity Low refractoriness High co-efficient of expansion upto this temperature High thermal diffusivity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Which of the following impurities reduces the refractoriness of magnesite bricks? All of these SiO₂ CaO Al2O₃ All of these SiO₂ CaO Al2O₃ ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Zirconia refractories are not used in Lining high temperature ceramic kilns Furnaces subjected to fluctuating temperature High frequency induction furnaces in the form of inductors Making sheaths for thermocouple Lining high temperature ceramic kilns Furnaces subjected to fluctuating temperature High frequency induction furnaces in the form of inductors Making sheaths for thermocouple ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Spalling resistance of a refractory can not be increased by Using a coarser grog during its manufacture Making it denser Increasing its porosity Decreasing its thermal co-efficient of expansion Using a coarser grog during its manufacture Making it denser Increasing its porosity Decreasing its thermal co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Panel test determines the __________ of refractories. Refractoriness under load (RUL) Fusion point Slag penetration resistance Spalling resistance Refractoriness under load (RUL) Fusion point Slag penetration resistance Spalling resistance ANSWER DOWNLOAD EXAMIANS APP