Which statement about nondestructive testing is true?

• A. Nondestructive testing uses methods that do not impair future usefulness.
• B. Destructive testing is required for all structural components.
• C. Nondestructive testing measures only chemical composition.
• D. Nondestructive testing cannot detect flaws.

Answer: (A)

Nondestructive testing evaluates a part without causing damage that would limit its future use. The goal is to inspect and assess integrity while keeping the item ready for continued service, so the test methods are chosen specifically to avoid impairing usefulness. Through techniques like ultrasonic, radiographic, magnetic particle, liquid penetrant, and eddy current testing, inspectors can detect flaws, corrosion, thickness changes, or other defects without destroying the component.

The other statements don’t fit because destructive testing isn’t required for all structural components, and nondestructive testing isn’t limited to measuring chemical composition; it also assesses integrity and detects flaws. And nondestructive testing is indeed used to find flaws, not to prove there are none.