ACI Concrete Field Testing Technician - Grade I Practice Exam

What is the consequence of not calibrating the temperature measuring device?

1. Incorrect temperature readings

2. Increased durability of concrete

3. Faster setting times

4. Improved accuracy

The correct answer is: Incorrect temperature readings

Not calibrating the temperature measuring device leads directly to incorrect temperature readings. The accuracy of temperature measurements is crucial in concrete testing because temperature can significantly affect the setting time, strength, and overall performance of concrete. If the device is not calibrated, it may provide readings that misrepresent the actual temperature of the concrete mix. These erroneous readings can ultimately lead to improper mixing or curing practices, which could result in subpar concrete quality, compromised structural integrity, or failures in the concrete under load. Other options, such as increased durability or faster setting times, do not directly relate to the consequences of calibration issues. Instead, they imply favorable conditions that arise from accurate readings, which makes the risk of incorrect temperature readings even more critical to managing the concrete's properties effectively. Similarly, improved accuracy is not a consequence of failing to calibrate; rather, it is a benefit derived from proper calibration practices.