ACI Concrete Field Testing Technician - Grade 1 (18) Exam Questions with 100% Correct Answers

ACI Concrete Field Testing Technician - Grade 1 (18) Exam Questions with 100% Correct Answers ASTM C1064 - Answer ️️ -Standard Test Method For Temperature of Freshly Mixed Hydraulic-Cement Concrete The end of the temperature sensing portion of the temperature measuring device shall be submerged a minimum of ____ into the freshly mixed concrete. - Answer ️️ -3 inches [75 mm] C1064, Sec. 8.1 The temperature measuring device shall have a capacity of measuring the temperature of freshly mixed concrete to ± ____ °F (± ____ °C) throughout a range of ____ °F ( ____ °C). - Answer ️️ -±1 °F (±0.5 °C) ; 30 to 120 °F (0 to 50 °C) C1064, Sec. 5.2 The temperature measuring device shall be calibrated ____ , or whenever there is a question of ____ . - Answer ️️ -annually, accuracy C1064, Sec. 6.1 The temperature of concrete may be measured in a wheelbarrow. True or False - Answer ️️ - True The temperature of concrete may be measured in a wall form. True or False - Answer ️️ -True C1064, Sec. 7.1 A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temperature. True or False - Answer ️️ -False C1064, Sec. 7.2.2 What must be done to the sample container prior to sampling the concrete? - Answer ️️ - Dampen with water C1064, Sec. 7.2.1 What must be done to the concrete surrounding the temperature measuring device after the device is submerged in the fresh concrete? - Answer ️️ -Close off air voids by gently pressing the concrete around the device C1064, Sec. 8.1 How long must the temperature measuring device remain in the freshly mixed concrete? - Answer ️️ -minimum of two minutes, maximum of five minutes C1064, Sec. 8.2 After the temperature of the concrete is read, what is then required? - Answer ️️ -Reporting of temperature C1064, Sec. 9.1 The temperature of the concrete is reported to the nearest ____ °F - Answer ️️ -1 °F (0.5 °C) C1064, Sec. 9.1 According to Test Method C1064, what is one reason to take the temperature of concrete? - Answer ️️ -Verify conformance to a specified requirement for temperature of concrete C1064, Sec. 4.1 A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True or False - Answer ️️ -False The sample of concrete used for temperature determination must be rodded 25 times. True or False - Answer ️️ -False C1064, Sec. 7 & 8 ASTM C172 - Answer ️️ -Standard Practice for Sam