Question 738Steam Plants - Assistant Engineer

The correct answer is A) fuel oil heating return drains. Fuel oil heating return drains are commonly used to produce saturated vapor in contaminated steam generators on ships. The fuel oil heating system is used to maintain the proper viscosity of the fuel oil so it can be easily pumped and atomized for combustion. The return drains from this heating system can become contaminated with small amounts of fuel oil, which can then be used as the input to a contaminated steam generator to produce saturated vapor. The other options are incorrect because condenser cooling water (B), bilge water (C), and sanitary water (D) are not typically routed to a contaminated steam generator for vapor production. These other waste streams would require different treatment methods before being discharged.