Question

Pick out the wrong statement.

a.

The toughness of a material decreases, when it is heated.

b.

Crane hooks are normally made of wrought iron.

c.

Cold working of a metal decreases its fatigue strength.

d.

The temperature at which new grains are formed in a metal is known as the recrystallisation temperature.

Answer: (c).Cold working of a metal decreases its fatigue strength.

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Q. Pick out the wrong statement.

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