Weight of a porous sample is 325 g when wet and 315 g when dry. The sample in th

Question

Weight of a porous sample is 325 g when wet and 315 g when dry. The sample in the suspended condition weighs 200 Apparent porosity for this sample is {(W_w - W_d)/(W_w - W_s)} times 100 12% 30% 20% 10% Bulk density in the previous question is (B = W_d/(W_w - W_s)) 2.52 4.0 5.0 4.6 What is the true porosity of the sample in questions 23 and 24 if density of the sample is 5.6? [(rho - B)/rho] times 100 25% 35% 45% 55% Consolidation in ceramics is done by Sintering Firing Both A and B None of the above Which ceramic materials show lowest Coefficient of Thermal Expansion (CTE) ZrO_2 and Al_2O_3 Diamond and BN TiO_2 and Mull SiC and Al_2O_3

Explanation / Answer

25) 8%

26) 2.52

27) 55%

28) sintering

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