Question: To preheat a ceramic mold to cast with aluminum.
Options:
Preheat the ceramic mold to 1500 F which is higher than the melting temperature of Aluminum.
Preheat the ceramic mold to 1500 F which is higher than melting temperature of Steel.
Answer: Preheat the ceramic mold to 1500 F which is higher than the melting temperature of Aluminum.