ACI Certification Practice Exam

Is it necessary to remove the extra concrete on the sides of the cone after striking off the top?

1. True

2. False

3. Only for aesthetic purposes

4. Only if it affects measurement

The correct answer is: False

The correct response is that it is not necessary to remove the extra concrete on the sides of the cone after striking off the top. The intention behind striking off the top of the concrete sample is to ensure that the measurement of the concrete's volume is accurate and that the sample conforms to the specified dimensions. The excess concrete on the sides of the cone does not influence the volume for this specific test. This practice focuses on capturing an accurate representation of the concrete's properties without the additional material affecting measurement outcomes. In many testing protocols, the primary concern is that the top surface is level and that the sample fits the standard dimensions required for testing, rather than the aesthetic presentation of the cone. Thus, the excess concrete can be left intact without compromising the test's validity or accuracy.