How many relief valves are there for the boom functions?

The correct answer to the question regarding the number of relief valves for the boom functions is six. This is because, in crane systems, hydraulic circuits typically use relief valves to protect components from excessive pressure. For boom functions, the design incorporates multiple relief valves to manage the various movements and operations of the boom effectively.

Each boom function may have its own dedicated relief valve to ensure precise control and safety. The presence of six relief valves allows for a more complex hydraulic system, which can accommodate the various demands placed on the crane's boom when lifting or extending loads. This configuration contributes to better safety measures, as each relief valve can help prevent overpressure situations that could lead to equipment failure or accidents. The number of relief valves thus reflects the requirements of the hydraulic system's operational capabilities and safety protocols.