🔍 Key Concepts

• Study how the flash chamber is piped to and from the auxiliary boiler coil and thermostat tube. • Recall what happens when hot high‑pressure water is suddenly exposed to a lower pressure (the definition of flashing). • Think about whether the flash chamber’s job is to create flashing, prevent it, or use the flash for some useful purpose.

💭 Think About

• Trace the flow: where does the heated water from the boiler coil go, and what happens to its pressure when it enters the flash chamber? • Which of the choices best matches a device that handles the separation of steam and water after a sudden pressure drop? • Look at the thermostat tube: is it mechanically connected to the flash chamber in a way that would let it regulate anything inside the chamber?

✅ Before You Answer

• Verify which option actually involves flashing (liquid rapidly turning to steam) and matches the label on the chamber. • Check whether any option incorrectly suggests a function already handled by other components, like feedwater regulators or thermostats. • Confirm that the function you pick would reasonably explain why a separate, vertical vessel is needed beside the boiler, instead of a small internal fitting.