What is feedwater and why must it be treated before entering a boiler?

• A. Feedwater is steam condensed back; it must be heated to boiler temperature.
• B. Feedwater is water returned from condensate or makeup water that replaces losses; it must be treated to prevent corrosion, scale, and carryover.
• C. Feedwater is air used for combustion; it must be filtered.
• D. Feedwater is water used to wash boiler; it must be neutralized.

Answer: (B)