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1. |
The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the_______________? |
A. | Water alkalinity & leakage |
B. | Hydrazine addition during feed water treatment |
C. | Release of non-condensable gas from water in the boiler |
D. | Scale formation |
Answer» D. Scale formation | |