Which of the following is a correct statement about 'H' posts?

• A. They can only be made of steel
• B. Their cap fits lightly to let out moisture
• C. They can only be made of cast iron
• D. None of the above

Answer: (D)

H posts are a type of fence post with an H-shaped cross-section used to support fencing systems. They aren’t restricted to a single material; depending on the system and load, they can be steel, aluminum, or other suitable metals, and sometimes even composites in specialized applications. The idea that a cap must fit loosely to vent moisture isn’t a universal design requirement for H posts, and cast iron isn’t a typical material choice for fence posts due to brittleness and weight. Because none of those statements accurately describe H posts in all cases, none of the listed specific claims is universally true.