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Which outcome occurs when thermal expansion capacity is insufficient in a continuously welded railroad beam?

A)Beam undergoes thermal buckling
B)Damping capacity is greatly increased
C)Grain boundary slip is accelerated
D)Cryogenic creep resistance improved

💡 Explanation

The continuous welding constrains the expansion. Therefore, compressive stress generates elastic instability, triggering thermal buckling of the railroad beam rather than creep, because the material reaches its yield strength first. Damping isn't affected in a constraining manner.

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