Cold crushing strength of ordinary fireclay brick is about 950 kg/cm² . On expo

Question

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 .

Options:

A . 450

B . 250

C . 150

D . 65

Answer: Option D

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