Visual Testing
The basic ability that an inspector should posses is visual acuity. This is a crucial method in NDT which is too often over looked. An visual inspection of an operational plant can often reveal obvious problem areas such as leaks, excess vibration, corrosion or misalignment. If the inspector don't have the access VT can be done by using visual aids such as borescope, mirrors, closed-circuit tv, optical borescope etc…