ACI Concrete Strength Testing Technician Practice Test

When calibrating testing equipment, what is generally the first step?

1. Applying a load to the equipment

2. Verifying zero settings on scales

3. Testing various specimens

4. Cleaning the equipment

The correct answer is: Verifying zero settings on scales

When starting the calibration process of testing equipment for concrete strength, verifying the zero settings on scales is the first critical step. This action ensures that the equipment is properly reset to zero before any measurements are taken, which is crucial for achieving accurate and reliable results. Without confirming the zero settings, any subsequent readings may be skewed or incorrect, resulting in significant errors in the data collected. Checking the zero setting establishes a baseline from which all measurements will be compared and ensures that the equipment functions as intended. While other actions such as cleaning the equipment, applying loads, and testing various specimens do play important roles in the overall calibration process, they typically follow the verification of the zero settings. Ensuring that the scale starts from a known, correct reference point is essential before proceeding with any further steps in the calibration protocol.