How to become a CWI: Tips for Success
Q:- Why is it essential to clean the surrounding parent metal adjacent to the weld metal made by MMA(SMAW) which is to be ultrasonically tested?
- Sound waves will not travel though paint
- Remove any rust
- The spatter will impede the contact of the probe and the parent material surface
- Spatter will reflect the back will echo signal and give spurious indications
Q:- Steels that have intentional addition of sulphur , lead or selenium to improve machinability :
A) Are used for truck axles only
B) Can not be welded
C) Can develop liquation crack in the HAZ after welding
D) Do not require approved procedures to be welded
Q:- A STAR test is carried out to determine which of the following
(A). A quick indication of weld quality for welder qualification test
(B). The test result can be used to verify that the material has not been adversely mechanically damaged by the heat during welding
(C). An indication of material elongation properties
(D). An indication of through thickness ductility (in the Z direction)
AWS-CWI Certification | Certified Welding Inspector Exam Training Course 