ACI Written Exam Questions and Answers 2024

ACI Written Exam Questions and Answers 2024 The sensor of the temperature measureing device shall be submerged a minimum of ____ in - Answer-3 (75mm) The temperature measureing device shall have a capacity of measuring temperature of freshly mixed conrcrete to +-_____ degrees F throught a range of _____ - Answer-1(.5 degrees C), 30-120 (0-50 degrees C) The temperature measuring device shall be calibrated____, or whenever there is a question of _____ - Answer-annually, accuracy The temp of concrete may be measured in a wheelbarrow - Answer-true the temp of concrete may be measured in a wall form - Answer-true A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temp. - Answer-false What must be done to the sample container prior to sampling the concrete - Answer- dampen (with water) what must be done to the concrete surrounding the temp measuring device after the device has submerged - Answer-Press concrete around measuring device How long must the temp device remain in the concrete - Answer-at least 2 minutes (but no more than 5) After temp of concrete is read, what then is required - Answer-reporting of temp the temp of concrete to be measured to the nearest ____degree F - Answer-1 (.5 degree C) According to the ASTM C1064 what is one reason to take the temp of concrete - Answer-verify conformance to a specified requirement for temp A max temp of concrete is specified in ASTM C1064 - Answer-False The sample of concrete used for temp determination must be rodded 25 times - Answer-False Sampling by this method is required when tests are to be made to determine ____ with specification requirements - Answer-compliance The method covers sampling from four types of mixers which are _____, _____, ____, and _______ - Answer-stationary mixes, paving mixers, revolving drum mixers and open top mixers The maximum allowable time between obtaining the first and final portions of a composite sample is ______ minutes - Answer-15 Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample - Answer-True The maximum elapsed time allowed between obtaining the final portion of the composite sample and beginning the tests for slump, temp, and air content is ______ minutes - Answer-5 the molding of strength test specimens shall begin within ____ minutes after fabricating the composite sample - Answer-15 The concrete sample must be protected from contamination and ____ - Answer-rapid evaporation