American Society of Mechanical Engineers (ASME) Practice Exam 2026 - Free ASME Practice Questions and Study Guide

The required relieving capacity of safety valves for boilers is based on maintaining the safety of the system and preventing excessive pressure buildup. The correct answer indicates that safety valves must be capable of relieving steam to ensure that pressure does not exceed 6% above the maximum allowable working pressure (MAWP).

This limit is established to protect the integrity of the boiler and associated systems. If the pressure were to exceed this threshold, it could lead to dangerous situations such as equipment failure or explosions. The safety valve's design and rating ensure that it operates effectively within this margin. By adhering to this requirement, engineers can ensure safety features are reliable and compliance with regulations governing boiler operation.

Other options suggest varying thresholds beyond this safe limit, which would not provide adequate protection for the boiler system. Therefore, the focus on a relieving capacity that includes a maximum 6% above MAWP is crucial for operational safety.