ACI Grade 1 Field Testing Certification Practice Test – Irving Questions & 100% Verified Answers | Latest Update | Already Graded A+

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 or F) ☑: False (2-5 minutes) The temperature measuring device must be accurate to within 0.1 degree. (T or F) ☑: The temperature measuring device shall have a capacity of measuring temperature of freshly mixed concrete throughout a range of _____ to _____ degree F ( ______ to ______ degree C) ☑: 30 to 120 degree F ( 0 to 50 degree C) A composite sample is not needed if only the temperature test is being run. (T or F) ☑: True EXCELLENCE The temperature of fresh concrete in a placement must be measured by inserting a thermometer into the top six inches of concrete. (T or F) ☑: False (3 in.) The temperature of the concrete is recorded to the nearest ______ degree F (______ degree C) ☑: 1 degree F (0.5 degree C) ASTM C1064 states the container used to measure temperature of concrete must be large enough to provide at least 5 inches of concrete around the sensor. (T or F) ☑: Calibrate the temperature measuring device at least __________, or whenever there is a question of accuracy. ☑: Annually After the thermometer is placed in the concrete: ☑: Gently press concrete around the thermometer According to ASTM C1064, what is one reason to take the temperature of concrete? ☑: Verify conformanc