Hydraulic fluid type knowledge entails identifying what?

• A. Identify Proper Fluid Type per Vehicle Specifications.
• B. Check Fluid Level.
• C. Replace Hydraulic Filter.
• D. Inspect Pump Drive Belt.

Answer: (A)

The main concept being tested is selecting the correct hydraulic fluid type as specified by the vehicle manufacturer. Hydraulic systems rely on a fluid with a particular viscosity, additive package, and compatibility with seals and components. Using the fluid exactly as specified ensures proper lubrication, correct system performance, and longevity of seals and parts. Mismatching the fluid can cause swollen or degraded seals, reduced efficiency, foaming, and accelerated wear.

The other actions relate to different aspects of maintenance rather than identifying the correct fluid type: checking the fluid level concerns quantity, not which fluid to use; replacing the hydraulic filter deals with filtration and cleanliness; inspecting the pump drive belt is about the mechanical drive and not fluid selection.