What is a primary purpose of standpipe systems?

The primary purpose of standpipe systems is to assist in firefighting operations. Standpipes are vertical pipes in a building that allow firefighters to access water quickly and efficiently when battling fires. They provide a reliable source of water pressure at various points throughout the structure, enabling firefighters to connect hoses at strategic locations and effectively combat the flames. This system is especially crucial in high-rise buildings where access to water from ground level may be inadequate or too slow for effective fire suppression.

Other options, such as monitoring electrical supply, maintaining temperature control, or serving as a ventilation system, do not relate to the primary role of standpipe systems. These functions are typically managed by other systems specifically designed for those purposes. Thus, the answer emphasizing standpipe systems' role in supporting firefighting efforts is the most accurate.