American Society of Mechanical Engineers (ASME) Practice Exam 2025 - Free ASME Practice Questions and Study Guide

The maximum pressure and temperature rating for cast iron fittings is defined by industry standards and specifications, which establish the capability of these fittings under various conditions. For cast iron fittings, a common standard outlines permissible limits that are typically within the range of 250 psi (pounds per square inch) for pressure and 450°F for temperature.

This rating reflects the structural integrity and material properties of cast iron, which is known for its good strength but lower ductility compared to other materials. It is essential for ensuring safe operation in systems where cast iron components are used, such as plumbing and HVAC systems.

While other options might suggest higher values, they exceed the typical ratings set for cast iron fittings, which could lead to safety and performance issues if used incorrectly beyond their rated capacities. Thus, the correct answer aligns with recognized engineering standards for cast iron fittings found in industry references.