What is the status of the MEK seal when considered secure?

A MEK (Methyl Ethyl Ketone) seal that is considered secure is characterized as tamper evident. This means that the seal is designed in such a way that any unauthorized access or tampering with the seal will be visibly indicated. A tamper evident seal provides a layer of security by allowing personnel to quickly assess whether the seal has been compromised.

When a seal is tamper evident, it serves its purpose by alerting users to potential breaches, ensuring that the integrity of the contents it secures remains intact as long as the seal is undisturbed. This makes it particularly important in emergency equipment scenarios, where maintaining the integrity of supplies and equipment is crucial.

In contrast, a completely sealed condition would imply no visible breaches at all, which may not convey the same level of assurance if the seal could have potentially been tampered with beforehand. The options suggesting a broken seal or an intact seal that has been checked do not align with the primary function of providing evidence of unauthorized access. Hence, tamper evident is the best descriptor of a secure MEK seal.