Which is NOT a component of the ventilation control system?

The ventilation control system in an underground mine is essential for maintaining air quality and ensuring the safe operation of mining activities. Within this system, various components work together to manage airflow effectively.

Stoppings are physical barriers constructed to control the movement of air in specific areas of the mine. They help direct airflows and prevent the mixing of fresh air with contaminated air, thus enhancing ventilation efficiency.

Undercasts, or undercasts, are structures that allow air to pass under obstacles, such as shafts or roadways, without disrupting the flow. This helps maintain an effective ventilation circuit throughout the mine.

Regulators, or air regulators, are utilized to adjust and control the amount of airflow in particular sections of the mine. They can be opened or closed to increase or decrease air volume, ensuring that the air in the working areas remains safe for miners.

In contrast, electrical blowers, while they can assist in moving air and contributing to ventilation, are not considered a direct component of the ventilation control system's design and structure. Therefore, identifying electrical blowers as not being a component emphasizes the importance of understanding the distinct roles of various ventilation elements in the mining environment.