Question

What is the density of the plastic used in speed tip welding?

(a) 916 kg/m^3

(b) 923 kg/m^3

(c) 946 kg/m^3

(d) 982 kg/m^3

I had been asked this question by my school teacher while I was bunking the class.

I want to ask this question from Types of Welding in portion Welding and Related Processes of Casting-Forming-Welding II

Answer 1

The correct option is (c) 946 kg/m^3

Explanation: The plastic which is used in the process of speed tip welding is polypropylene or polypropene. It is classified under thermoplastics materials. The density of polypropylene is 946 kg/m^3 and it starts melting at 130°C.