ACI Concrete Strength Testing Technician Practice Test

Is it true or false that specimens with a diameter discrepancy of less than 2% can still be tested?

1. True

2. False

3. Only under certain conditions

4. Only if approved by a supervisor

The correct answer is: False

The assertion is that specimens with a diameter discrepancy of less than 2% are not suitable for testing. When it comes to concrete strength testing, such discrepancies can significantly affect the accuracy and reliability of the test results. A consistent specimen diameter ensures uniformity in the loading conditions during the test, which is crucial for obtaining valid measurements of compressive strength. If a specimen has a diameter that varies by less than 2%, while it might appear inconsequential, it can still introduce variability in the test results. The purpose of the testing standards is to maintain strict criteria for specimens to ensure that the results are repeatable and meaningful. Hence, allowing specimens with even a slight discrepancy to be tested may compromise the integrity of the strength assessment. This principle underscores the importance of adhering to specified guidelines, which dictate standards for dimensions and other characteristics that must be met to ensure valid testing outcomes. Thus, the statement is deemed false, as such discrepancies are not acceptable if the results are to be trusted and used for structural decision-making.