The welder's certificate mainly tests practice+theory, that is, the knowledge about welders. You can buy related books to review. \x0d\ welder certificate: welding and hot cutting operations (electric welding, gas welding, arc welding, electric welding, gas cutting, etc. ), also known as employment permit, the issuing authority-Safety Production Supervision and Administration Bureau, is a necessary document for employment. Without certificate, it can be divided into fusion welding and hot cutting operations, pressure welding operations and brazing operations. The certificate is equipped with a magnetic card for national use. \x0d\ is also called vocational qualification grade certificate, issued by labor bureau, which is a necessary certificate for promotion and salary increase. The salary of senior is 200-500 higher than that of junior high school, which is divided into five levels: mechanic and technician, and the certificate is common throughout the country. \x0d\x0d\ application conditions \ x0d \ intermediate vocational qualification certificate application \x0d\ 1. 18 years old, under 55 years old \x0d\2. Good health, no diseases and physical defects that hinder electrician's work, such as epilepsy, mental illness, heart disease, sudden fainting and color disorder. \x0d\3。 Possess the post operation certificate of this type of work (only certain types of work need this condition) \x0d\ Apply for the intermediate vocational qualification certificate (only meet one of the following conditions) \x0d\ 1. Have the post operation certificate of the same type of work (this condition is only required for certain types of work) \x0d\2. Have the same type of primary certificate \ x0.