Q1: Material of construction of foundary crucible is

ANS:A - graphite

The material of construction for a foundry crucible, which is used for melting and pouring metals, is typically graphite. Graphite crucibles are preferred in foundries because of their high melting point, excellent thermal conductivity, and resistance to chemical corrosion, making them suitable for withstanding the high temperatures involved in metal casting processes. Additionally, graphite has low thermal expansion, which helps prevent cracking during heating and cooling cycles.