What are CADs inspected for?

What are CADs inspected for?

• A. Expiration date
• B. Roundness
• C. Material hardness
• D. Surface finish

Answer: (A)

Some components have a limited service life, and CADs are one of them. The key requirement is to verify that the device is still within its guaranteed life and calibration period. The expiration date on a CAD indicates how long its sensing materials or internal electronics are expected to remain reliable. After that date, performance cannot be guaranteed, so the device should be replaced rather than trusted to function correctly. The other properties listed—roundness, material hardness, surface finish—are relevant to different types of mechanical parts where wear, fit, or surface quality affect performance. They don’t determine whether a CAD detector will provide accurate or timely readings, which is why expiration dating is the appropriate inspection criterion.

Some components have a limited service life, and CADs are one of them. The key requirement is to verify that the device is still within its guaranteed life and calibration period. The expiration date on a CAD indicates how long its sensing materials or internal electronics are expected to remain reliable. After that date, performance cannot be guaranteed, so the device should be replaced rather than trusted to function correctly.

The other properties listed—roundness, material hardness, surface finish—are relevant to different types of mechanical parts where wear, fit, or surface quality affect performance. They don’t determine whether a CAD detector will provide accurate or timely readings, which is why expiration dating is the appropriate inspection criterion.