🔍 Key Concepts

• Function and purpose of a boiler gage glass connection (top vs bottom) • How steam and water each enter/leave the gage glass under normal operation • What happens to the visible water level if one connection (top or bottom) becomes blocked

💭 Think About

• Think about whether steam or water is supposed to enter through the TOP connection during normal operation. • If the TOP connection is blocked, will steam still be able to reach the glass? What will that do to the pressure balance between the glass and the boiler? • With no proper communication at the top, consider whether water can move freely in or out of the glass and how that affects the indicated level.

✅ Before You Answer

• Identify which connection (top or bottom) normally carries steam space and which carries water space. • Decide what the water in the glass will do if it is only connected to the water space and not properly vented to steam. • Consider whether a lack of steam flow at the top alone would directly cause overheating or the glass to be blown empty, or mainly affect the indicated level.