Non-Destructive Testing (NDT) Practice Test

What is the primary use of ultrasonic inspection?

1. Surface cleaning and preparation

2. Dimensional measurements and flaw detection

3. Material strength testing

4. Heat treatment evaluation

The correct answer is: Dimensional measurements and flaw detection

Ultrasonic inspection is primarily utilized for dimensional measurements and flaw detection in various materials. This technique involves the use of high-frequency sound waves that are transmitted into a material. When these sound waves encounter a flaw, such as a crack, void, or inclusion, they are reflected back to the sensor, allowing the technician to identify and evaluate the nature of the flaw. In addition to detecting flaws, ultrasonic inspection is also adept at providing precise dimensional measurements of components, including wall thickness assessments, which are crucial in industries such as aerospace, manufacturing, and construction. This dual capability of flaw detection and measurement highlights the versatility and effectiveness of ultrasonic inspection in ensuring the integrity and safety of structures and components. Other options, while relevant to material assessment, do not capture the primary function of ultrasonic inspection. For instance, surface cleaning and preparation are typically performed using different methods, and while material strength testing and heat treatment evaluation are important aspects of material science, they do not align directly with the ultrasonic inspection technique as it is primarily focused on the detection of internal flaws and measurement.