Non-Destructive Testing (NDT)

The non-destructive testing field consists of several NDT methods employed by industry to evaluate the properties of materials by testing to determine the serviceability of components parts without causing damage.

It is a comprehensive way to locate surface, subsurface flaws, and defects that may impact safety and reliability of parts. It plays a crucial role in many fields to include aviation, pipelines, bridges, refineries, power stations and more.

Graduates of the program here at GTCC will be instructed to the American Society Nondestructive Testing (ASNT) level of training. The course length for each NDT program will vary and dependent upon the NDT technique being trained.

Common NDT methods include:

  • visual testing,
  • eddy current,
  • liquid penetrant,
  • magnetic particle,
  • ultrasonic,
  • radiographic.


Liquid Penetrant Testing (PT) Level I, Level II

This is a 32-hour course that allows the user to detect surface-breaking defects such as hairline cracks.  This method will transpose invisible defects to visible defects by using a liquid dye and describes the principles, limitations and advantages of liquid penetrant non-destructive testing (NDT) as applied to industrial/aviation components such as pipes, valves, hangers, and supports.

Emphasis is placed on the liquid penetrant testing techniques, including the use of color contrast solvent removable and water washable penetrant techniques. Upon completion, students should be able to demonstrate a basic understanding of various NDE liquid penetrant techniques and their applications.

No courses available at this time.

Electromagnetic Testing (ET) Level I, Level II

Also known as "Eddy Current" testing, this NDT technique is commonly used to inspect components by detecting flaws using the principle of electromagnetic induction. The course is broken down into two area, Level I and Level II. Level I is the first level that requires the Level-I ET technician to have the skills and knowledge to be able to perform specific tests and calibrations. Level II requires the ET technician to have the skills and knowledge to be able to perform specific tests and calibrations.

Course Name Dates Days Hours Campus Room Register
NDE-3153-B01 Electromagnetic Testing Level I

3/27/23 - 3/31/23

M-F M-Th 8 a.m. – 4:30 p.m.; F 8 a.m. - 6:30 p.m. Aviation II Bldg 141 Register Now

Cost: $133.00

Ultrasonic Testing (UT) Level I, Level II

The UT Level I course introduces the fundamentals of ultrasonic testing reinforcing the guidelines provided by the American Standards for Nondestructive Testing (ASNT). Level II describes the principles, limitations, and advantages of nondestructive testing as applied to industrial components. Emphasis placed on ultrasonic testing (UT) techniques, the testing instrumentation and factors that affect UT Level II.

No courses available at this time.

Frequently Asked Questions

The two main levels being instructed here at GTCC, Level I and Level II.

There are three main levels of qualifications: Level-I, Level-II, and Level-III.

Level-I is the first certifiable qualification level and requires that the Level-I technician have the skills and knowledge to be able to perform specific tests and specific calibrations.

The Level-II technician is required to have the skills necessary to be able to set up and calibrate equipment, conduct tests, interpret, evaluate and document results.

It depends on the technique being trained. The minimum training hours in a classroom/lab environment can vary from 12 to 40 hours for each level of certification. In addition, on-the-job training hours are required to become fully certified which is dependent upon the NDT technique.

The practical exam requires the student to demonstrate their proficiency in performing tasks that are typical of those to be accomplished in the performance of his/her duties.

The general exam for all levels is a closed book exam covering the cross section of the applicable method and level.

The specific exam for all levels is an open book exam covering the requirements and use of specifications, codes, equipment, operating procedures and test techniques.