Question

Naval brass contains around ____________ of lead.

(a) 0.5%

(b) 0.10%

(c) 0.20%

(d) 10%

I got this question during an interview.

My doubt is from Properties of Copper and its Alloys-2 in section Copper and its Alloys of Aerospace Materials & Processes

Answer 1

Correct choice is (c) 0.20%

To explain I would say: Naval brass consists of around 0.2 per-cent lead. It also contains approximately 0.10 per-cent iron. Naval brass also has some impurities present that account for about not more than 0.1 per-cent.