🔍 Key Concepts

• Trace the flow path of steam or air from the inlet at the bottom of the unit up into the sounding chambers (L and M). • Look at how the vertical valve/rod assembly connects to the operating lever at J and passes through the housing at point E. • Think about the difference between a valve that controls flow, a reed that vibrates, and a drain that removes condensate.

💭 Think About

• Follow the arrows in the illustration: after steam/air enters at the bottom, what specific component does it encounter at E, and where does the medium go next? • Does the part at E appear to be thin and flexible (like a reed), a passage/drain, or a guided valve element that opens and closes a port? • Which chamber (L or M) is directly affected when the lever at K–J is moved, and how does the component at E help that action happen?

✅ Before You Answer

• Identify exactly what moves when the lever at K is operated and how that motion is transmitted to the part at E. • Check whether there is any outlet or drain passage connected to E, or if E is simply a guide/seat in the flow path. • Confirm which chamber label (L or M) is located immediately adjacent to the port controlled by the rod/valve that passes through E.