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With increase in the porosity, thermal spalling resistance of fireclay brick
Spalling hammer is used for
To resist spalling tendency, a refractory should have
Spalling resistance of a refractory can not be increased by
Spalling of a refractory means its
Spalling tendency of refractories is reduced by increasing its
Coal is pulverised before burning in large capacity boiler furnaces mainly to
Which of the following furnaces will have maximum thermal efficiency?
Thermal efficiency of furnaces can be improved by