The purpose of sometimes adding exothermic materials to sand is
A)To dry the mould
B)To produce directional solidification by the generation of heat
C)To produce chilled surfaces
D)To heat the core
E)To heat the sand

Question

Quizplus · Accepted Answer

Exothermic materials are added to sand to generate heat, which helps in producing directional solidification by maintaining the temperature gradient necessary for controlled solidification of the metal.

The Purpose of Sometimes Adding Exothermic Materials to Sand Is