General Contractor Practice Exam

In construction, what does PSI stand for regarding concrete strength?

1. Points per square inch

2. Pounds per square inch

3. Pressure strength index

4. Post strength indicator

The correct answer is: Pounds per square inch

In construction, PSI stands for Pounds per Square Inch, which is a unit of pressure that measures the compressive strength of concrete. This measurement indicates how much weight or stress the concrete can withstand before failing. A higher PSI rating signifies stronger concrete, which is essential for ensuring the structural integrity and longevity of buildings and other structures. Understanding the PSI of concrete is crucial as it helps builders and contractors select the appropriate concrete mix based on the specific requirements of a construction project, such as load-bearing capacity and environmental factors. The other options do not represent recognized terminology within the concrete industry, which is why they are not applicable when discussing concrete strength.