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?

Related Mcqs:

The linear thermal expansion of _______________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent?

A. Fireclay B. Silica C. Magnesite D. Corundum...

Which of the following does not occur during firing/burning of refractories ?

A. Removal of water of hydration B. Vitrification C. Decrease in crushing strength D. Development of stable mineral form...

With increase in the density of silica refractories, its_______________?

A. Resistance to slag attack increases B. Spalling resistance reduces C. Both A. and B. D. Neither A. nor B....

To resist spalling tendency, a refractory should have________________?

A. Greater diffusivity B. Low specific heat C. Low thermal co-efficient of expansion D. All A., B. and C....

The highest melting pure oxide (m.p. > 3000°C)is___________________?

A. Thoria B. Alumina C. Beryllia D. Zirconia...