The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the_______________?
Correct answer: C. Release of non-condensable gas from water in the boiler
- 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
Explanation
Dissolved oxygen and other non-condensable gases promote electrochemical corrosion of boiler tubes and associated equipment. Hydrazine is added to remove oxygen, while scale formation mainly causes heat-transfer resistance rather than being the principal corrosion cause.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Heat Transfer Operations
645 free Heat Transfer Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Heat Transfer Operations questions
Blow off cock is provided in steam boiler to ____________________?
In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be__________________?
The bank of tubes located at the back of the domestic refrigerators are the _______________ tubes?
Heat required to raise the temperature of a body by 1 °C is called its_______________?
The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?
Insulation of liquid surface can be achieved by _____________ on top of its surface?