Which combination correctly states the hydraulic accumulator charge and the brake accumulator pressure?

Which combination correctly states the hydraulic accumulator charge and the brake accumulator pressure?

• A. 1,000 PSI and 500 PSI
• B. 1,500 PSI and 750 PSI
• C. 1,250 PSI and 1,000 PSI
• D. 1,750 PSI and 1,250 PSI

Answer: (B)

Energy storage in hydraulic systems relies on charging accumulators to a specific pressure so they can deliver a burst of fluid power when needed. The hydraulic accumulator is charged to a higher pressure because it serves the overall hydraulic system and must be able to supply rapid, high-force actuation even if the pump isn’t delivering at peak, while the brake accumulator is charged to a lower pressure to provide controlled, gradual braking action and protect components from excessive pressure. The pairing of hydraulic accumulator charge at 1,500 PSI with brake accumulator pressure at 750 PSI reflects this arrangement: a higher energy reserve for the main system, and a safer, more manageable pressure for braking. The other options either use pressures that are not standard for these subsystems or place too much pressure on the brake side, which could lead to harsher braking or system stress.

Energy storage in hydraulic systems relies on charging accumulators to a specific pressure so they can deliver a burst of fluid power when needed. The hydraulic accumulator is charged to a higher pressure because it serves the overall hydraulic system and must be able to supply rapid, high-force actuation even if the pump isn’t delivering at peak, while the brake accumulator is charged to a lower pressure to provide controlled, gradual braking action and protect components from excessive pressure.

The pairing of hydraulic accumulator charge at 1,500 PSI with brake accumulator pressure at 750 PSI reflects this arrangement: a higher energy reserve for the main system, and a safer, more manageable pressure for braking. The other options either use pressures that are not standard for these subsystems or place too much pressure on the brake side, which could lead to harsher braking or system stress.