Actually there is a list of "Duties of a Welding Inspector" that AWS has put together. If you remember from your CWI exam a book published by AWS- AWS QC1:96, it states the following:
4.2 Duties
The welding Inspector's specific duties are defined by the employer; however, applicants shall be able to demonstrate their abilities to perform the following duties:
4.2.1 Interpet drawings and other documents.
4.2.2 Verify that the base materials and consumable welding materials conform to the specifications and that welding filler metals used are as specified for each base material or combination of base materials.
4.2.3 Verify that the welding equipment to be used for the work is appropriate for use with the welding procedure and has the capability to meet the applicable requirements of the welding procedure.
4.2.4 Verify that the welding procdures are as specified and are qualified, and thatthe welding is performed in conformance to the applicable procedure.
4.2.4.1 Witness performance and testing of procedure qualification test assemblies, or supervise these activities when performed by outside agencies.
4.2.4.2 Verify documentation of procedure qualification test results.
4.2.5 Verify that welders, welding operators, and tack welders have been qualified in conformance to the applicable standards, and that they are qualified to use the welding procedures specified for the work.
4.2.5.1 Witness testing of the welder test assemblies and/or welding operator qualification test assemblies, or superivise these activities when performed by outside agencies.
4.2.5.2 Verify documentation of performance qualification test results.
4.2.5.3 Require requalification if there is evidence the welder's or welding operator's work does not conform to the requirements of the applicable standard.
4.2.5.4 Require requalification if the welder's or welding operator's qualification is not current.
4.2.6 Inspection of work
4.2.6.1 Verify that only approved or qualified welding procedures are used for the work.
4.2.6.2 Verify that the edge preparation or joint geometry meet the requirements of the welding procedure and drawings.
4.2.6.3 Verify that the specified filler metals are used and that the filler metals are maintained in proper condition, per requirements, or as recommended by the manufacturer.
4.2.6.4 Verify that the technique and performance of each welder or welding operator, and tack welder are as specified.
4.2.6.5 Verify that the work conforms to requirements of the applicable standards, drawings, or other documents.
4.2.6.6 Verify that the work inspected is identified and documented in accordance with specified reqyuirements.
4.2.7 Nondestructive Examination
4.2.7.1 Perform the required visual examinations.
4.2.7.2 Verify that the required visual and other nondestructive examinations have been performed by qualified personnel in the specified manner. Review the resulting information to ensure that the results are complete.
4.2.7.3 Perform any further nondestructive examinations that are required, provided qualifications are in conformance to the specified requirements.
4.2.8 Records
4.2.8.1 Prepare clear and concise reports and verify that the records of the welding procedure, the welding procedure qualification, the welder's, welding operator's and tack welder's qualifications, the control of welding materials, and the results of examinations are maintained.
<<Whew,>> (quote from AWS, mis-spellings and typo's are mine)
John Wright