S&T | Fortune Question of the Day | Day 15 скачать в хорошем качестве

S&T | Fortune Question of the Day | Day 15

Solution: (d) Difficulty Level: Medium Micro Topic: Material science Solving Strategy: Understand the basic features of metals like copper: eg antimicrobial properties of copper. Logically eliminate other options- Copper is an expensive material- hence it should have a specific function that other metals cannot provide. Functions mentioned in options, (a), (b) and (c) is possible with other cheaper materials. Option (d) is CORRECT. Copper sheathing was primarily used on the underwater hull of wooden ships to prevent biofouling — the accumulation of marine organisms such as barnacles, algae, and shipworms. Copper naturally releases ions that are toxic to these organisms, stopping them from attaching to the hull. This not only protected the wooden planks from damage but also reduced drag caused by such growth, thereby maintaining the ship’s speed and fuel efficiency. Copper reacts with sea water to produce an oxychloride film toxic to most marine plants. Weed growth, especially in the tropics, can quickly impair the performance of sailing ships, and it was clear that sheathed vessels would be swifter and more manoeuvrable than those with unprotected hulls. 🚀 Fortune IAS — Question of the Day Sharpen your Prelims preparation with one powerful question every day along with a crisp concept video. Why follow this series? ✨ Daily Prelims practice ✨ Quick, clear video explanations ✨ Strong concept building in minutes ✨ Builds consistency for UPSC success 📌 New Question Daily at 9:00 AM 📞 Admissions & Enquiries For admission details (Online & Offline): 📱 Call: 9495015888 / 8138940888 🌐 Apply: https://www.fortuneias.com/pcm/ 📧 Email: fortuneiasacademy@gmail.com 🔗 Website:https://www.fortuneias.com/ 📢 Join our UPSC Telegram community for daily updates: https://t.me/fortuneias #fortuneias #fortunequestionoftheday #upscexam #upsctoppers #keralaias #upscprelims #upscmains #civilservices #ias #ips #prelims2026 #upscpreparation