Question

Which of the following metal has a melting point of about 420oC and latent heat of fusion 26.3 cal/g?

(a) Nickel

(b) Copper

(c) Zinc

(d) Iron

The question was asked during a job interview.

I'd like to ask this question from Furnaces for Melting topic in portion Pouring – Gating Design, Melting Furnaces, Melting and Casting Quality of Casting-Forming-Welding I

Answer 1

The correct answer is:

(c) Zinc

Explanation: Zinc has a melting point of about 420°C, and its latent heat of fusion is approximately 26.3 cal/g. These properties are consistent with zinc, which is widely used in casting processes, particularly for die-casting and galvanizing.

• Nickel has a much higher melting point of about 1455°C.
• Copper has a melting point of around 1085°C.
• Iron has a melting point of approximately 1538°C.

Therefore, the metal described in the question is zinc.