Question 400Steam Plants - Assistant Engineer70% to pass
Which of the following statements describes the effects that dissolved oxygen has on boiler internal surfaces with changes in temperature and pressure?
AI Explanation
The correct answer is C: It increases the corrosive effect with increased pressure and decreases its corrosive effect with increased temperature.
This is because dissolved oxygen becomes more corrosive at higher pressures, as the increased pressure forces more oxygen to dissolve in the water. However, at higher temperatures, the solubility of oxygen decreases, reducing the corrosive effect.
The other options are incorrect because:
A) The statement about the effects of pressure and temperature is reversed.
B) Increased pressure and temperature both increase the corrosive effect of dissolved oxygen.
D) Temperature and pressure do have an effect on the corrosive nature of dissolved oxygen.
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