NDT Inspector Interview Questions and Answers

Electrochemical process refers to the degradation of materials through reactions with the environment.

• Electrochemical process involves the transfer of electrons between the material and its environment.

• This process can lead to corrosion, oxidation, or other forms of material degradation.

• For example, when metal comes into contact with moisture, an electrochemical reaction occurs, leading to rust formation.

• Electrochemical degradation can be accelerated by factors such as temper...read more

Magnetic inspection is a non-destructive testing method that uses magnetic fields to detect surface and subsurface defects in ferromagnetic materials.

• Magnetic particles are applied to the surface of the material being inspected.

• A magnetic field is then applied to the material, causing the particles to gather at areas of magnetic flux leakage.

• These gathered particles indicate the presence of defects such as cracks, inclusions, or discontinuities.

• Common techniques include magne...read more

The magnetic testing calibration device used is a gauss meter. Calibration is done by using a known magnetic field source.

• The gauss meter is used to measure the strength of a magnetic field.

• Calibration is done by using a known magnetic field source, such as a permanent magnet or an electromagnet.

• The gauss meter is placed near the magnetic field source and the reading is compared to the known value.

• Adjustments are made to the gauss meter until the reading matches the known val...read more

UT machine calibration is necessary to ensure accurate and reliable ultrasonic testing results.

• UT machine calibration involves adjusting and verifying the settings and performance of the ultrasonic equipment.

• Calibration ensures that the machine is accurately measuring and displaying the ultrasonic signals.

• It is important to calibrate the machine regularly to maintain its accuracy and reliability.

• Calibration requirements may vary depending on the specific UT machine and indust...read more

NDT is needed to ensure the safety, reliability, and quality of materials and structures in various industries.

• Detecting defects in materials and structures

• Preventing failures and accidents

• Ensuring compliance with regulations and standards

• Extending the lifespan of equipment and infrastructure

• Saving costs by identifying issues early on

Ultrasonic inspection is a non-destructive testing method that uses high frequency sound waves to detect flaws or measure thickness in materials.

• Uses high frequency sound waves

• Can detect flaws or measure thickness in materials

• Commonly used in industries like aerospace, automotive, and manufacturing

• Examples include detecting cracks in welds or measuring wall thickness of pipes

Calibration is essential in NDT to ensure accurate and reliable results.

• Calibration ensures that the equipment is functioning properly and accurately.

• It helps to detect any errors or deviations in the equipment.

• Calibration should be done regularly to maintain accuracy.

• Examples of calibration in NDT include checking the sensitivity of a radiographic film or verifying the accuracy of ultrasonic equipment.

• Calibration records should be kept for future reference and audit purposes...read more