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Question
Corrosion in boilers can be prevented by _________________?
Options:
A .  Deaeration of feed water
B .  Enhancing pH of feed water by adding alkali
C .  Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion
D .  All A., B. and C.
Answer: Option D
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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