Which of the following statements is true about fluids in building maintenance?

Fluids can transmit power, which is a fundamental principle used in various systems within building maintenance. In hydraulic systems, for example, fluids such as oil or water are utilized to transfer energy and provide mechanical force. This ability to transmit power is essential for operating equipment like pumps, lifts, and hydraulic machinery.

In contrast, the other statements misrepresent the role of fluids in building maintenance. Claiming that fluids cannot transmit power overlooks their critical application in hydraulic systems, where they serve as a medium for power transfer. The assertion that fluids are only for heating neglects their broader functions, including cooling, lubrication, and energy transmission. Additionally, stating that fluids are ineffective in mechanical systems fails to recognize their vital contribution to the operation and efficiency of numerous mechanical components. Thus, the validation of fluids as power transmitters underscores their importance and versatility in building maintenance practices.