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Refractory Technology

Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of______________?

Refractory Technology /
Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of______________?

A. Segar cones
B. Muffles for muffle furnaces
C. Insulating bricks
D. Crucibles used for melting of high purity metals

Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of______________? Read More »

Refractory Technology

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?

Refractory Technology /
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?

A. 450
B. 250
C. 150
D. 65

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? Read More »

Refractory Technology