Which method is not among the three primary inspection methods listed?

• A. Ultrasonic Testing
• B. Visual
• C. Physical
• D. Advanced

Answer: (A)

The main idea is understanding that the three primary inspection methods are broad categories, not individual techniques. Visual inspection and Physical (or functional) inspection are straightforward, hands-on ways to assess condition and performance. The third primary method refers to more specialized, advanced evaluations that use additional equipment and methods to get deeper information.

Ultrasonic Testing is a specific nondestructive testing technique that falls under the Advanced category. It’s a tool used within that advanced group to detect internal flaws or measure material properties, rather than being one of the broad primary methods themselves. That’s why it isn’t counted among the three primary inspection methods listed—the primary ones are the broad categories, and Ultrasonic Testing is a specific technique used within the Advanced category.