North Carolina General Contractors Practice Exam

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When is a self-loading scraper most efficient?

  1. When working on rocky terrain

  2. When operating in wet or muddy conditions

  3. While being assisted by a dozer pushing from the rear

  4. During dry seasons only

The correct answer is: While being assisted by a dozer pushing from the rear

A self-loading scraper is most efficient when it has the assistance of a dozer pushing from the rear. This combination capitalizes on the strengths of both machines, enhancing productivity and efficiency. The dozer can effectively loosen and move material, making it easier for the scraper to load and transport the material. The synergy between the two pieces of equipment allows for a smoother workflow, where the scraper can maintain a steady pace while continually gathering and hauling material without interruptions. In contexts such as rocky terrain or wet conditions, the scraper may face challenges that could hinder its efficiency. While it can still operate in those environments, it is not optimized for performance. Similarly, the assertion that it is only efficient during dry seasons overlooks its adaptability; however, conditions significantly influence its effectiveness. Therefore, the collaborative operation with a dozer enhances the scraper's capabilities, making this approach the most efficient use of the machinery.