Question 150Steam Plants - 1st Asst/Chief

The correct answer is A) Huddling chamber type. The huddling chamber type of safety valve is shown in the illustration SG-0018. This type of valve uses a huddling chamber around the valve seat to create a pressure differential that helps the valve open quickly and fully when the set pressure is reached. This design is commonly used in marine and industrial applications to provide reliable overpressure protection. The other answer choices, such as pressure-loaded, jet flow, and nozzle reaction types, are different safety valve designs that have distinct operating principles and are not depicted in the given illustration.