NICET - Highway Construction Inspection Practice Exam

What does CMPA stand for in relation to culverts?

1. Corrugated Metal Pipe Arch

2. Concrete Metal Pipe Assembly

3. Composite Material Pipe Arch

4. Circular Metal Piping Arrangement

The correct answer is: Corrugated Metal Pipe Arch

CMPA stands for Corrugated Metal Pipe Arch, which is a specific type of drainage structure utilized in highway construction and other civil engineering applications. This designation highlights that the pipe has a corrugated shape, allowing for increased strength and flexibility, making it well-suited for use under roadways where soil pressures and water flow need to be effectively managed. The use of metal, particularly in a corrugated form, provides several advantages, such as resistance to rust and environmental degradation compared to traditional materials. The "Arch" aspect of the term indicates that the structure is designed in an arched shape, enhancing its ability to span larger areas while also facilitating the flow of water beneath roadways or areas where maintaining natural watercourses is necessary. This knowledge is essential for highway construction inspectors, as they must ensure that the materials and designs used in drainage systems are compliant with engineering standards and capable of performing effectively in various environmental conditions.