Wooden utility poles treated thoroughly with creosote oil or preservatives achieve an operational service life of_____________?
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Answer: C. 25 to 30 years
Explanation
Treating wooden utility poles with creosote oil protects the timber from biological decay and insect damage. This chemical preservation process significantly extends the operational service life of the wood poles. Properly treated utility poles achieve a reliable field service life of twenty-five to thirty years. Creosote is a powerful wood preservative derived from the distillation of coal tar. Untreated timber utility poles rot quickly when exposed to soil moisture, fungi, and termites. Utility companies inspect and reinforce aging wooden poles periodically to maintain overhead line stability.
Rural electrical distribution networks often rely on wooden poles for their cost-effectiveness and insulation. Extending pole lifespan reduces capital replacement costs for power utility companies over decades. Environmental regulations govern the application and disposal of creosote-treated utility timber. Option A suggests two to five years, which is typical for untreated wood exposed to soil. Option B suggests ten to fifteen years, which underestimates the protective benefits of creosote treatment. Option D suggests sixty to seventy years, which exceeds the typical physical degradation limits of treated wood.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
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