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Pick out the wrong statement.

A. Cold cracking of a weld is due to the presence of hydrogen gas in the weld

B. True stress is given by, σ = σE (1 + εE), where σE and εE are engineering stress and engineering strain respectively

C. Phosphorous can be easily recovered in the iron blast furnace

D. High residual stress at the surface is beneficial for fatigue properties of a material

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
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  13. Viscoelastic behaviour is observed in __________ materials.
  14. Most of the phosphorous present in the blast furnace burden enters into
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  16. Specific __________ is a dimensionless quantity.
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  22. Hot extrusion of aluminium is done in the temperature range of __________ °C.
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