Preservative treatments on poles primarily increase which of the following?

• A. Weight reduction
• B. Service life
• C. Fire resistance
• D. Electrical conductivity

Answer: (B)

The main idea is that wood preservatives are used to protect outdoor poles from decay and insect attack, especially where moisture and soil contact are involved. By preventing fungi and other organisms from breaking down the wood, the pole remains structurally sound for a longer period, which directly increases how long it can be used before replacement is needed. That’s why this choice is the best fit.

Preservatives aren’t primarily about reducing weight—treatment can even add a bit of mass. They aren’t mainly about fire resistance, although some products can influence fire performance, it isn’t the primary goal. They also aren’t about changing electrical conductivity, since wood remains an insulator and this isn’t the intended purpose of the treatment.