Which two valve types are specifically identified as important for fire department personnel to understand?

Which two valve types are specifically identified as important for fire department personnel to understand?

• A. Outside screw and yoke valves and post indicator valves
• B. Ball valves
• C. Gate valves
• D. Globe valves

Answer: (A)

The main idea is that firefighters need valve types that clearly show whether water is flowing and can be identified from a distance during an emergency. Outside screw and yoke valves and post indicator valves are designed to give positive, easily visible indications of valve position. An OS&Y valve uses a rising stem, so the stem visible at the valve shows whether it is open or closed; this direct visual cue lets responders confirm status at a glance. A post indicator valve has a visible indicator post that clearly communicates if the valve is open or closed, even from outside the immediate valve location. This visibility and straightforward operation makes them especially important for fire department personnel: you can quickly verify and control the water supply during a fire. Other valve types like ball, gate, or globe valves lack a universal, easy-to-read indication of their position from a distance, which can slow locating and operating the valve when every second counts.

The main idea is that firefighters need valve types that clearly show whether water is flowing and can be identified from a distance during an emergency. Outside screw and yoke valves and post indicator valves are designed to give positive, easily visible indications of valve position. An OS&Y valve uses a rising stem, so the stem visible at the valve shows whether it is open or closed; this direct visual cue lets responders confirm status at a glance. A post indicator valve has a visible indicator post that clearly communicates if the valve is open or closed, even from outside the immediate valve location. This visibility and straightforward operation makes them especially important for fire department personnel: you can quickly verify and control the water supply during a fire.

Other valve types like ball, gate, or globe valves lack a universal, easy-to-read indication of their position from a distance, which can slow locating and operating the valve when every second counts.