What hazard exists when working with pressurized fluids?

• A. Electrical hazards
• B. Hydraulic hazards
• C. Thermal hazards
• D. Chemical hazards

Answer: (B)

When you work with pressurized fluids, the fluid’s stored energy under high pressure creates hydraulic hazards. A sudden release can propel a jet of liquid or gas at high speed, capable of penetrating skin and delivering contaminants or causing serious tissue injury. Hose or line failures, fittings coming loose, or valves opened too quickly can cause the fluid to whip around or trap you in the path of the jet. If the fluid is hot or caustic, burns or chemical harm can follow the initial impact as well. This combination of energy transfer, potential for injection injuries, and the risk of hose whip is what makes hydraulic hazards the primary concern with pressurized fluids. Electrical hazards relate to electric energy, not the fluid’s pressure-driven energy. Thermal hazards depend on the fluid’s temperature, and chemical hazards depend on the chemical properties of the fluid; while those can be present, the defining risk from pressurized fluids is the hydraulic energy they store and can release.