Highly porous refractory bricks are ____________________?
Correct answer: D. None of these
- A. Less susceptible to chemical attack by molten fluxes and gases etc
- B. Very strong
- C. Having very high thermal conductivity
- D. None of these
Explanation
Highly porous refractory bricks have low density and low thermal conductivity, but their pores reduce mechanical strength and allow easier penetration by molten fluxes and gases. Hence none of the listed positive descriptions applies.
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