10+ NDT Engineer Interview Questions and Answers

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

• Ultrasonic testing is used to detect internal flaws or defects in materials such as cracks, voids, and inclusions.

• The procedure involves sending high-frequency sound waves through the material and measuring the time it takes for the waves to bounce back.

• The reflected waves are then analyzed to determine the location and size of any defects.

• Ultras...read more

Ultrasonic testing uses high frequency sound waves to detect flaws or measure thickness in materials.

• Ultrasonic waves are sent into the material being tested

• The waves bounce back differently depending on the material's thickness or any flaws present

• The reflected waves are analyzed to determine the material's properties

• Commonly used in non-destructive testing of metals, plastics, and composites

LPT is Liquid Penetrant Testing used to detect surface defects. DP is Differential Pressure used to measure flow rate.

• LPT involves applying a liquid penetrant to the surface of a material and then removing the excess to reveal any surface defects.

• DP measures the difference in pressure between two points in a system to determine the flow rate.

• DP can be used in various applications such as measuring the flow rate of fluids in pipes or detecting leaks in a system.

• Both LPT and DP...read more

Acceptance criteria of UT refers to the minimum standards that a material or component must meet to be considered acceptable for use.

• The acceptance criteria of UT is based on the size, shape, and location of the defects found in the material or component being inspected.

• The criteria may vary depending on the industry and application of the material or component.

• The acceptance criteria may be specified in codes, standards, or customer requirements.

• Examples of acceptance criter...read more

DAC stands for Digital Acquisition System, used in NDT to convert analog signals to digital signals for analysis.

• DAC is used in NDT to convert analog signals to digital signals for analysis

• It is an important component of the inspection system

• DAC is used to improve the accuracy of flaw detection and sizing

• It can be used in ultrasonic, eddy current, and other NDT methods

• DAC curves are used to calibrate the inspection system

Welding defects can be detected and prevented through proper training, inspection, and quality control measures.

• Proper training of welders to ensure they are using correct techniques and equipment

• Inspection of welds using non-destructive testing methods such as ultrasonic testing or X-ray inspection

• Quality control measures such as monitoring welding parameters and ensuring proper materials are used

• Prevention through proper preparation of materials, maintaining equipment, and ...read more

Designing a 3-floor building involves considering structural stability, functionality, and aesthetics.

• Start by determining the purpose of the building and its layout requirements.

• Consider the load-bearing capacity of the structure and ensure proper foundation design.

• Plan the floor layout, including rooms, corridors, and staircases.

• Incorporate safety measures like fire exits and emergency evacuation routes.

• Choose suitable materials for construction, considering durability and ...read more

BHEL manufactures a wide range of products including power generation equipment, industrial motors, transformers, and more.

• Power generation equipment

• Industrial motors

• Transformers

• Boilers

• Turbines

NDT process is a non-destructive testing method used to detect defects in materials without causing damage.

• NDT methods include ultrasonic testing, radiography, magnetic particle testing, and visual inspection.

• Limitations of NDT include the inability to detect subsurface defects in certain materials, the need for trained personnel to perform the tests, and the cost of equipment.

• NDT is commonly used in industries such as aerospace, automotive, and construction to ensure the saf...read more

Frequency is the number of occurrences of a repeating event per unit of time.

• Frequency is measured in Hertz (Hz).

• It is commonly used in physics, engineering, and signal processing.

• For example, the frequency of a sound wave determines its pitch.

• In NDT, frequency is important for determining the resolution and depth of penetration of the inspection method.