Final answer:
An operable window, door or similar device that provides a means of escape and access for rescue in an emergency is known as an emergency exit.
Step-by-step explanation:
An operable window, door or other similar device that provides for a means of escape and access for rescue in the event of an emergency is commonly referred to as an emergency exit. Emergency exits are crucial in buildings as they allow occupants to evacuate quickly and safely during emergencies such as fires. These exits are usually designed to be easily identifiable, accessible, and opened without the need for special tools or keys.
One example of an emergency exit is a fire escape, which is a metal staircase or ladder attached to the exterior of a building. Fire escapes provide a secondary means of egress when the main exits are blocked or inaccessible.