🔍 Key Concepts

• how superheaters work (they raise the temperature of already dry steam) • what would cause temperature to fluctuate rapidly if boiler load and firing rate are steady • difference between problems that cause a steady change vs a quick up‑and‑down change in temperature

💭 Think About

• Ask yourself: which option would most likely cause the steam temperature to jump up and down quickly rather than just rise or fall and stay there? • Think about whether each choice would affect steam flow rate or steam quality (wet vs dry) and how that would show up at the superheater outlet. • Consider which fault would tend to happen intermittently or irregularly inside the superheater, instead of being a constant condition.

✅ Before You Answer

• For each option, decide: would this cause a stable higher or lower temperature, or an unsteady fluctuating temperature? • Think about whether the fault would be inside the superheater element itself or elsewhere in the system, and how that would show up at the outlet. • Verify which condition would create rapid, irregular changes in heat transfer inside the superheater tubes.