Which of the following statements describes...

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Question 1 of 2066636eef28f7522a1c51fb97

Which of the following statements describes pertinent criteria for performing a surface blow for the purposes of removing excess chemicals and/or salinity as indicated by boiler water testing on an auxiliary steam boiler as fitted on your vessel?

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Question 1 of 20

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🔍 Key Concepts

• Purpose of a surface blow on an auxiliary boiler (what problem are you correcting in the water space?) • Behavior of salinity and chemicals at the water surface when the boiler is steaming vs. secured • Effect of boiler water level changes during a blowdown on risk of priming/carryover

💭 Think About

• Think about whether a surface blow is meant to remove impurities while water is circulating and steaming, or when everything is still and cold. • Consider what happens to the concentration of dissolved solids right at the water surface when the boiler is under load. • Ask yourself: if you open the surface blow valve, what will happen to the water level, and should you start with a normal level or intentionally higher than normal to stay safe?

✅ Before You Answer

• Verify whether surface blowdowns are normally done with the boiler on the line (steaming) or shut down. • Check what effect performing a blow has on boiler water level and why an engineer might temporarily keep the level at or above normal. • Confirm that the main goal of a surface blow is to remove floating scum and high‑concentration surface water, not bottom sludge—does this influence when and how it’s done?

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