True or False: Hydraulic fluids needed in aerial lifts must not be fire resistant.

Fire-resistant hydraulic fluids are essential in aerial lifts due to the potential for equipment to be exposed to high temperatures or open flames, particularly in construction or industrial environments. The presence of flammable fluids can lead to significant hazards, including fire risks, which can endanger operators and nearby personnel.

When hydraulic systems work under pressure, they can produce heat through friction and movement. If the hydraulic fluid consists of flammable materials, this scenario increases the likelihood of ignition and fire, which is why it's crucial for the fluids used in these applications to have fire-resistant properties. Utilizing non-fire-resistant hydraulic fluids could lead to catastrophic failures and severe safety incidents.

The mention of "sometimes true" or "depends on application" in other choices suggests a level of ambiguity that does not align with the best safety practices. In high-risk environments, the use of fire-resistant hydraulic fluids should be a standard requirement to ensure the safety of equipment and personnel operating aerial lifts.