A 50 mm × 10 mm × 4 mm copper bar, free to expand, is heated from 20 – McqOptions

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1.	A 50 mm × 10 mm × 4 mm copper bar, free to expand, is heated from 20°C to 50°C, what shall be developed?
A.	shear stress
B.	tensile stress
C.	no stress
D.	compressive stress
Answer» D. compressive stress

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