Multiple choice

The hot tearing in a metal casting is due to

  1. high fluidity

  2. high melt temperature

  3. wide range of solidification temperature

  4. low coefficient of thermal expansion

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hot tears in metal costing is a metallurgical defect which is also called hot cracking occurs as casting cools. This happens because the metal is weak when it is hot and residual stresses in the metal can cause the casting to fail as it cools. Proper mould design prevent this type of casting. So that uniform cooling rate for all parts can be maintained which reduce the range of solidification temperature.