Which of the following is an engineering control measure?

Engineering control measures are designed to eliminate or reduce hazards in the workplace by modifying equipment or the environment. Installing ventilation systems exemplifies engineering controls because it addresses potential airborne contaminants by improving air quality and reducing exposure to harmful substances. These systems physically change the work environment to protect workers' health, making it an effective strategy to mitigate risks associated with airborne pollutants.

On the other hand, job rotation tends to reduce exposure over time but does not fundamentally alter the hazard itself. Providing disposable masks offers personal protective equipment rather than modifying the workplace environment. Regular safety meetings are vital for communication and awareness but do not involve any physical changes to equipment or work conditions. These options focus more on procedural or administrative methods rather than engineering solutions that directly alter the environment or equipment to reduce risks.