Concrete Field Technician NCDOT Study Guide 2023 passed

Concrete Field Technician NCDOT Study Guide 2023 passedWhile performing the Volumetric Method air test, two pints of alcohol were used to dispel the foam. Which of the following statements is true? - correct answer No correction is required When pouring Drill Pier Concrete, what is the minimum sampling frequency for test specimens? - correct answer Each load When used to determine unit weight, the concrete in the mold must be struck off with a ... - correct answer Strike off plate The reading on the gauge of a pressure meter is 6.2%. The aggregate used has a correction factor of 0.3%. The final air reported is ... - correct answer 5.9% Which percent range most nearly represents the amount of paste volume in a concrete mix? - correct answer 20-40% The air content for incidental and structural concrete ranges from ________ to ________ percent - correct answer 4.5-7.5 Components of concrete that are heated due to cold conditions are heated to a maximum temperature of _________ degrees Fahrenheit by NCDOT specifications. - correct answer 150 When water is added to concrete in the mixer at the job site, the minimum number of revolutions placed on the mixer is... - correct answer 25 After consolidation of the unit weight sample, a small amount of concrete can be added to correct for any deficiencies. - correct answer true Calculate the air content using the following weights: Theoretical Unit Weight 150.05 pcf Actual Unit Weight 140.75 pcf - correct answer 6.2%