Hearing protection must be worn within a radius ________ of a locomotive.

Answer: B — 150 ft

Hearing protection must be worn within a radius of 150 feet of a locomotive due to the high noise levels generated by the engines and other associated machinery. This regulation is in place to protect the hearing of employees who work in close proximity to the train operations, as prolonged exposure to loud noises can lead to permanent hearing loss. The 150-foot requirement ensures that workers are sufficiently protected, as sound levels can reach harmful thresholds within this distance. By mandating the use of hearing protection in this specific radius, the railroad ensures that workers can perform their duties safely while minimizing the risk of auditory damage. It’s important to recognize that sound levels can vary depending on several factors, including equipment and environmental conditions, but the 150-foot guideline is a standard that provides an effective buffer zone for hearing safety around locomotives.