When checking for the presence of sulfite in...

Question 1 / 270705eccefa3bacbc34ba4d47c00

Question 1 of 270705eccefa3bacbc34ba4d47c00

When checking for the presence of sulfite in the feed water of an auxiliary boiler, you are in essence checking __________.

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Question 1 of 27070

When checking for the presence of sulfite in the feed water of an auxiliary boiler, you are in essence checking __________.

🔍 Key Concepts

• The purpose of adding sodium sulfite (or similar sulfite compounds) to boiler feed water • The relationship between sulfite and corrosion from dissolved gases in boilers • Difference between pH control, hardness control, and oxygen control in boiler water treatment

💭 Think About

• Ask yourself: What specific problem in a boiler does sulfite treatment primarily address—scale from minerals, acidity/alkalinity, or corrosion from gases? • Which water treatment chemical is normally used to tie up calcium/magnesium hardness, and is that the same role sulfite plays? • How would an excess of dissolved oxygen affect boiler metal surfaces, and what kind of chemical would you use to reduce that risk?

✅ Before You Answer

• Be clear on what pH control means (acid vs. alkaline) and which chemicals are typically used for that. • Review which tests are normally used to measure hardness versus those used to monitor dissolved oxygen scavengers like sulfite. • Think about why a marine engineer would regularly test for sulfite residual in a working auxiliary boiler’s feed water.

Question 1 of 27070

When checking for the presence of sulfite in the feed water of an auxiliary boiler, you are in essence checking __________.

the hardness of the makeup feed water

to ensure the compound additions are adequate for control of pH

to ensure the compound additions are adequate for controlling dissolved oxygen

to ensure the automatic or manual blow down rate and frequency is adequate for control of total dissolved solids

Question 1 / 270705eccefa3bacbc34ba4d47c00

Question 1 of 270705eccefa3bacbc34ba4d47c00

When checking for the presence of sulfite in the feed water of an auxiliary boiler, you are in essence checking __________.

Back

Question 1 of 27070

When checking for the presence of sulfite in the feed water of an auxiliary boiler, you are in essence checking __________.