PCE value (Segar cone) of Superduty refractories is more than 33, which is equivalent to a temperature of ____________ °C?
2
Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of______________?
3
Cold crushing strength of ordinary fireclay brick is about 950 kg/cm2. On exposure to a temperature of about 1500°C, its crushing strength may come down to as low as ______________ kg/cm2?
These are just sample questions. The actual quiz contains 25 questions.
