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Which of the following patterns has high compressive strength?(a) Plastic pattern(b) Wax pattern(c) Polystyrene pattern(d) Plaster patternThis question was posed to me in exam.The origin of the question is Pattern Materials in section Pattern and Pattern Making of Casting-Forming-Welding I

Answer»

The correct CHOICE is (d) Plaster pattern

Explanation: Among plastic PATTERNS, WAX patterns and polystyrene pattern, it is plaster pattern which has the HIGHEST compressive strength. The CALCULATED compressive strength is as high as up to 285kg/cm^2.



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