Which of the following statements is true regarding hydraulic fluids?

Hydraulic fluids play a crucial role in powering hydraulic systems used in various applications, including construction equipment. It is essential for these fluids to have characteristics that promote safety and efficiency, especially regarding fire resistance.

The correct statement emphasizes the necessity for hydraulic fluids to be fire resistant in general construction equipment. This fire resistance is crucial because hydraulic systems can operate under high pressure and temperature conditions, thereby posing a risk if there is a leak or failure. The use of fire-resistant hydraulic fluids helps mitigate the risk of ignition in the event of fluid leakage.

Other characteristics of hydraulic fluids, such as being insulating, non-flammable, or biodegradable, are important but are not universally applicable to all types of hydraulic systems. For example, some hydraulic fluids may not be insulating, and while non-flammable or biodegradable fluids are available, there are specific situations and applications where different types of hydraulic fluids are more suitable. Therefore, the requirement for fire resistance is particularly relevant and critical in ensuring safety in environments such as construction sites.