Inspection & Testing (ET105) case studies
Inspection & Testing (ET105) · Put your knowledge to work in context.
Inspection & Testing (ET105) is a multiple-choice examination covering the knowledge an inspection or testing technician needs to verify that materials, components, and fabricated work meet specified requirements. It suits quality inspectors, NDT trainees, welding and fabrication QA staff, laboratory technicians, and engineers who sign off on test results, as well as candidates building a formal credential in inspection practice. The Inspection & Testing (ET105) case studies are 5 cases and about 2,066 words.
1Wall Thickness Verification on Seamless Pipe
An inspector is verifying the wall thickness of a lot of 200 seamless carbon steel pipes (OD 168.3 mm, nominal wall 7.11 mm, specification allows -12.5% tolerance). The inspector uses an ultrasonic thickness gauge with a dual-element transducer, calibrated on a step wedge with known thicknesses.
374 words, about 2 min2Magnetic Particle Inspection on Welded Assembly
A magnetic particle inspection (MPI) is performed on a carbon steel weld overlay on a pressure vessel. The weld is 12 mm thick and the surface is prepared by grinding.
387 words, about 2 min3Tensile Test Results and Acceptance Criteria
A tensile test is performed on a specimen machined from a steel plate to verify mechanical properties. The specimen has a original gauge length of 50 mm and a cross-sectional area of 200 mm².
476 words, about 2 min4Sampling Plan for Incoming Raw Material
A receiving inspection is performed on a lot of 500 identical machined brackets. The inspection level is II, AQL 1.0%, normal inspection, single sampling.
389 words, about 2 min5Calibration Interval and Measurement Uncertainty
A digital micrometer is used to measure the diameter of a precision shaft with a tolerance of ±0.01 mm. The micrometer has a resolution of 0.001 mm and a calibration certificate that states the expanded uncertainty (k=2) is ±0.002 mm.
440 words, about 2 min