ASNT NDT Level II case studies
ASNT NDT Level II · Put your knowledge to work in context.
ASNT NDT Level II is one of the certifications offered through ASNT Certification Services, which describes its Level II and Level III certifications as globally recognized, impartial qualifications that validate an NDT technician's competence. ASNT calls these "comprehensive, two-part certifications": candidates sit an NDT General computer-based exam plus specific computer-based exams for one or more test methods. The ASNT NDT Level II case studies are 5 cases and about 3,901 words.
1RFET Signal 30 mm from a Support Plate
You are scanning the tubes of a carbon steel shell-and-tube heat exchanger with remote-field eddy current testing. Tubes are 19 mm OD, 2.1 mm wall; carbon steel support plates sit at 600 mm intervals and are the only tube supports.
728 words, about 4 min2Toe Line on a Coated Nozzle Weld
An AC electromagnetic yoke is used on a 25 mm thick SA-516 Grade 70 nozzle-to-shell weld after welding. The surface was wire-brushed and still carries a 0.10 mm primer coat.
793 words, about 4 min3Cold-Shift Penetrant Results on Aluminium Forgings
On the night shift the shop is at 9 degrees C and the penetrant in the tank measures 8 degrees C. The written procedure states a qualified temperature range of 10 to 50 degrees C.
754 words, about 4 min4Ir-192 Weld Radiograph with Two Problems
A 25 mm thick double-V butt weld in carbon steel is shot with Ir-192 at 500 mm source-to-object distance, film in contact on the far side, 3 mm effective source size. Density measures 2.8 in the parent metal but 4.2 under the weld cap; your procedure requires 1.8 to 4.0 in the area of interest.
776 words, about 4 min5Root-Region Signal in a Backed Single-V Weld
A 25 mm thick carbon steel single-V butt weld, welded from one side onto ceramic backing, is examined with a 45 degree, 2.5 MHz shear wave probe against a DAC built from 1.5 mm side-drilled holes. At 25 mm surface distance the probe shows a signal at 35 mm sound path, amplitude DAC + 4 dB.
850 words, about 4 min