ACI CONCRETE FIELD TESTING

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ACI CONCRETE FIELD TESTING

CERTIFICATION GRADE I EXAM NEWEST 2025

ACTUAL EXAM COMPLETE 100 QUESTIONS

AND CORRECT DETAILED ANSWERS

(VERIFIED ANSWERS) |ALREADY GRADED A+

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• For concrete with aggregates less than 3 inches, the

thermometer must remain in the fresh concrete sample a minimum of 5 minutes or until the temperature reading stabilizes. (T/F)

ANSWER: F (2 minutes but not more than 5)

• The temperature measuring device must be accurate to within

0.1°. (T/F)

ANSWER: F (1°F or 0.5°C)

• The temperature measuring device shall have a capacity of

measuring temperature of freshly mixed concrete throughout a

range of ___ to ___ F:

ANSWER: 30° to 120°F

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• A composite sample is not needed if only the temperature test

is being run. (T/F)

ANSWER: T

• The temperature of fresh concrete in a placement must be

measured by inserting a thermometer into the top six inches of concrete. (T/F)

ANSWER: F (Does not specify aggregate size; ASTM C1064

requires a minimum of 3 in. submersion)

• ASTM C1064 states the container used to measure the

temperature of concrete must be large enough to provide at least

• inches of concrete. (T/F)

ANSWER: F (3 inches or must be 3x the nominal max size)

• The temperature of the concrete is recorded to the nearest ___

°F:

ANSWER: 1°F

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• Calibrate the temperature measuring device at least ___, or

whenever there is a question of accuracy:

ANSWER: Annually

• After the thermometer is placed in the concrete, what should

be done?

ANSWER: Gently press concrete around the thermometer

• According to ASTM C1064, what is one reason to take the

temperature of concrete?

ANSWER: Verify conformance

• It is allowable to remove the temperature measuring devices

from the freshly mixed concrete to read the temperature if you cannot see the reading. (T/F)

ANSWER: F

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• The maximum allowable time between obtaining the first

and last portions of the composite sample may not exceed 5 minutes. (T/F)

ANSWER: F (15 minutes)

• Start molding specimens for strength tests within 30 minutes

after fabricating the composite sample. (T/F)

ANSWER: F (15 minutes)

• The composite concrete sample must be protected from the

sun, wind, contamination, and rapid evaporation. (T/F)

ANSWER: T

• If the concrete contains aggregate larger than those that are

appropriate for the size of mold or equipment used, the sample should be wet sieved before making the test. (T/F)

ANSWER: T