how to pass welding inspector, AWS-CWI, CSWIP and IWIP C,Salary of welding inspector, CWI vs. CSWIP

What is welding inspector? Different schemes in the world? AWS-CWI, CSWIP and IWIP certifications Salary of welding inspectors Choose the correct path. CWI vs. CSWIP AWS Inspector or CSWIP Inspector How To Pass The AWS CWI Exam