Question 183Steam Plants - 1st Asst/Chief

The correct answer is C) Wire all valves closed that connect to other boilers. This is the correct answer because it is a safe practice to ensure that there is no pressure or steam from other connected boilers when opening the waterside of a boiler for inspection. Wiring valves closed prevents the accidental release of pressure or steam, which could be hazardous. The other options are not considered safe practices. Option A, ventilating the waterside until completely dry, does not address the risk of pressure or steam from other connected boilers. Option B, opening the water drum manhole before the steam drum manhole, does not specifically relate to the safety of opening the waterside. Option D, removing handhole plate dogs with a slugging wrench, does not address the core issue of managing pressure and steam when opening the boiler.