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Pick out the wrong statement. | |
A. | In a thin spherical shell under internal pressure, hoop stress is equal to the half of axial stress. [Correct Answer] |
B. | Thermoplastic material does not follow Hooke's law of elasticity. [Wrong Answer] |
C. | Components under longitudinal compression is called 'struts' and the load under which strut fails is called crippling or buckling load. [Wrong Answer] |
D. | At low temperatures (sub-zero) in pressure vessels, the ductility of metal diminishes and brittle fracture occurs while at high temperature in pressure vessels, embrittlement of material may take place. [Wrong Answer] |