4690Chemical EngineeringMedium
Pick out the wrong statement?
ACrane hooks are normally made of wrought iron
BCold working of a metal decreases its fatigue strength
CThe temperature at which new grains are formed in a metal is known as the recrystallisation
DThe toughness of a material decreases, when it is heated
Correct answer
B. Cold working of a metal decreases its fatigue strength
Explanation
The correct answer is Cold working of a metal decreases its fatigue strength.