ACI Grade 1 Field Testing Certification Practice Test Questions with Answers 100% Correct

ACI Grade 1 Field Testing Certification Practice Test Questions with Answers 100% Correct 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. (True or False) - Answer- False The temperature measuring device must be accurate to within 0.1 degrees. (True or False) - Answer- False The temperature measuring device shall have a capacity of measuring temperature of freshly mixed concrete throughout a range of ______ to ______ Fahrenheit ( - Answer- A composite sample is not needed if only the temperature test is being run. (True or False) - Answer- True The temperature of fresh concrete in a placement must be measured by inserting a thermometer into the top six inches of concrete. (True or False) - Answer- False The temperature of the concrete is recorded to the nearest _______ Fahrenheit (______ Celcius). - Answer- 2, 0.5 ASTM C1064 states the container used to measure temperature of concrete must be large enough to provided at least 5 inches of concrete around the sensor. (True or False) - Answer- Calibrate the temperature measuring device at least _________, or at least whenever there is a question of accuracy. - Answer- Annually After the thermometer is placed in the concrete: - 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. (True or False) - Answer- The maximum allowable time between obtaining the first and last portions of the composite sample may not exceed 5 minutes. (True or False) - Answer- Start molding specimens for strength tests within 30 minutes after fabricating the composite sample. (True or False) - Answer- The composite concrete sample must be protected from sun, wind, contamination, and rapid evaporation. (True or False) - Answer- If the concrete contains aggregates larger than those that are appropriate for a size of mold or equipment used, the sample should be wet-sieved before making the test. (True or False) - Answer- The composite sample should not be remixed before beginning any tests. (True or False) - Answer- Sampling should normally be performed, as the concrete is discharged from the mixer. (True or False) - Answer- ASTM Method C172 includes sampling from stationary mixers, paving mixers, truck mixers, agitators, and non-agitating equipment. (True or False)