Question 370Steam Plants - Assistant Engineer70% to pass
An adequate phosphate reserve should be maintained in boiler water to _______________.
AI Explanation
The correct answer is D) prevent hard scale formation.
Maintaining an adequate phosphate reserve in boiler water helps prevent the formation of hard scale deposits on the boiler's internal surfaces. Phosphates act as scale inhibitors, keeping minerals in the water suspended and preventing them from adhering to the boiler surfaces. This helps maintain the boiler's efficiency and prevents damage from scale buildup.
The other options are incorrect because they do not directly address the purpose of maintaining a phosphate reserve. Removing dissolved oxygen, reducing blowdown frequency, and maintaining a neutral pH are important for boiler water treatment, but they are not the primary reasons for having a sufficient phosphate reserve.
Related Questions
#368 Scale prevention in boiler water is accomplished by adding treatment chemicals to _______________.#369 The major reason dissolved gases are removed from boiler feed water is because they may cause _______________.#371 Although accurate tests of boiler water for dissolved oxygen are difficult to obtain onboard ship, you can be fairly certain of proper oxygen removal by _______________.#372 In the prevention of moisture carryover from a marine boiler, one important consideration is to _______________.#373 Ferrous sulfate tends to go into solution in boiler water when the value of the hydrogen ion concentration increases. Consequently, the water in a 900 psi boiler should be _______________.