Outcome+2

Home ** FAB 2060 - Arc Welding 2 – Review Questions ** ** Outcome 2 **

[|**http://nptel.iitm.ac.in/courses/Webcourse-contents/IIT-ROORKEE/MANUFACTURING-PROCESSES/index.htm**]

**Reference - Welder 120102a - SMAW Equipment**

1. Compare straight and reverse polarity and the resulting heat distribution.

2. Describe the advantages and disadvantages of using alternating and direct current.

3. Describe the effects of a short and long arc on mild steel.

4. Describe the effects of improper:

· Amperage setting

· Arc length

· Travel speed

5. Explain the importance of removing the following from a joint before welding: · Oil

· Paint

· Rust

· Mill scale