North Carolina Building Contractor License Practice Exam

What does ASTM cover in building construction?

1. Testing samples of fresh concrete

2. Standards for metal reinforcement

3. Guidelines for thermal insulation

4. Specifications for plumbing systems

The correct answer is: Testing samples of fresh concrete

ASTM, which stands for the American Society for Testing and Materials, establishes a wide range of standards that cover various aspects of building construction and materials. Specifically, with regard to testing samples of fresh concrete, ASTM provides rigorous methods to assess properties such as workability, strength, and durability of concrete. These tests are crucial for ensuring that concrete meets specific performance criteria prior to its use in structural applications. Concrete is one of the fundamental materials in construction, and knowing how it performs under different conditions helps engineers and builders guarantee that structures will be safe and long-lasting. The specific ASTM standards related to fresh concrete include ASTM C143 for slump test, ASTM C231 for air content, and ASTM C39 for compressive strength, among others, ensuring a comprehensive evaluation of fresh concrete. While other areas like metal reinforcement, thermal insulation, and plumbing systems are also covered by ASTM standards, the focus of this question is on the testing of fresh concrete, making that the correct choice. Understanding these ASTM standards is essential for anyone involved in construction to ensure compliance and quality in building practices.