Spalling resistance of a refractory can not be increased by
3. Spalling resistance of a refractory can not be increased by
o using a coarser grog during its manufacture
o increasing its porosity
o decreasing its thermal co-efficient of expansion
o making it denser
Ans: D
o using a coarser grog during its manufacture
o increasing its porosity
o decreasing its thermal co-efficient of expansion
o making it denser
Ans: D
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