Final answer:
The receptacle that must be mounted so that no point along the wall is more than 24 inches from it is a power outlet.
Step-by-step explanation:
The receptacle that must be mounted so that no point along the wall line is more than 24" from a receptacle is b) Power outlet. The National Electrical Code (NEC) sets forth requirements for the placement of electrical outlets in residential and commercial buildings. This regulation ensures that there is adequate access to electricity for appliances and equipment without the need for unsafe and unsightly extension cords. In most living spaces, the power outlets need to be spaced such that any point along the floor line of the wall is within 6 feet of an outlet, which translates to an outlet being every 12 feet at most. This is often interpreted as no point along the wall being more than 24" from an outlet (measured horizontally), ensuring ease of access to electrical power.