Final answer:
The question appears to pertain to a plug-type emergency exit, referring to its specific design which ensures safety by allowing operation in only one specific way.
Step-by-step explanation:
The student's question seems to be referencing a type of emergency exit that functions similarly to a plug-type hatch. While there may have been some confusion with the description provided about a 'three-hole outlet' and a 'standard three-prong plug,' relating to electrical components, it's important to clarify the context. An emergency exit described as a plug-type hatch is more relevant to safety engineering and design in various contexts such as aircraft, marine, or building safety, where it is essential that an exit can only be operated in a specific manner to ensure safety and prevent accidental operation.