CSWIP 3.1: What is OCV ( Open Circuit Voltage ) in welding power source?

In this topic we will talk about OCV in welding power source. We need to solve some question to clear this topic: What is OCV? Types of static characteristic of power source? How to identify? How to know which welding process use what type of it ( CC or CV )? … 1) What is … Continue reading CSWIP 3.1: What is OCV ( Open Circuit Voltage ) in welding power source?

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CSWIP 3.1: Question with Answer and Explanation – Part 20

1) A solid inclusion in a welder may be: Entrapped slag.  (answer) Entrapped gas. Lack of inter-run fusion. None of the above. This is “solid” not gas! 2) Which is the following is a planar imperfection? Lack of sidewall fusion.  (answer) Slag inclusion. Linear porosity. Root concavity.             3) For … Continue reading CSWIP 3.1: Question with Answer and Explanation – Part 20

CSWIP 3.1: Question with Answer and Explanation – Part 19

1) One of the following alloys is non-magnetic. Which? 4% Chromium Molybdenum 12% Chromium Austenitic Stainless Steel  (answer) 9% Nickle Steel 2) When TIG welding Austenitic Stainless Steel pipe, Argon gas baking is called for. This is to: Prevent oxidation ( answer ) Prevent under bead cracking Prevent porosity Control the penetration bead shape 3) The principal … Continue reading CSWIP 3.1: Question with Answer and Explanation – Part 19