How many subjects do I need to take to get a welder's license?

The welder's license examination test 2 subjects: theory examination and practical examination. Theoretical examination of the implementation of the way the machine test, candidates in the examination, the computer randomly selected from the question bank inside 100 questions. Practical test mainly assess the candidate's practical hands-on ability and practical operation ability.

Welder's special operations license examination theory and practical license two exams;

Theory is a microcomputer test, automatically extracted from the question bank.

The actual operating license examination is generally oral expression.

Before 2014, the total score of the two exams was 60 points to pass.

In the latter half of 2014 it was changed to two total scores of 80 to pass.

And the questions are 75% by the National Safety Administration, 25% by the Regional Safety Administration

I. Preventive measures before operation:

Wearing a professional welding mask to protect the welder must wear a welding mask or light filtering glasses. The mask must be kept intact, no gaps or cracks, remain intact. In addition, a mask with a curved front is used to effectively reduce the amount of fumes entering the welder's breathing zone. Must be used with filters to protect the eyes, welding masks are equipped with filters solid for fixing and installing the protective plate and filter glass. Filters and filters can transmit a certain amount of light, while filtering out part of the arc light. Filter filter coefficient should be selected according to the size of the welding current. Operations must wear protective clothing, protective clothing is mainly to prevent the sparks generated by welding splash to the body to burn the skin, through the spectral analysis of the arc, found that the intensity of ultraviolet light is very large, ultraviolet rays will cause great harm to the human skin and eyes, and in severe cases, will also lead to blindness. It is also necessary to wear protective clothing, because its penetrating and thermal effects are also very strong, and can burn ordinary clothing across the skin. So, not only should you wear a mask, but also protective clothing.

Two, welding operations are as follows:

Melting welding and thermal cutting operations are applicable to gas welding and gas cutting, welding rod arc welding and carbon arc gas planing, submerged arc welding, gas shielded welding, plasma arc welding, electroslag welding, electron beam welding, laser welding, oxyfuel cutting, and excitation. High-pressure welding is used for resistance welding, pneumatic pressure welding, explosive welding, friction welding, cold pressure welding, ultrasonic welding, forging welding, etc. Welding operations are applicable to flame brazing operations, resistance brazing operations, induction brazing operations, dip brazing operations, brazing operations in the furnace, excluding.