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2024 ACI WRITTEN EXAM WITH 200
QUESTIONS AND CORRECT ANSWERS
(100% CORRECT ANSWERS) ACI
CONCRETE FIELD TESTING TECHNICIAN
CERTIFICATION TEST 2024/2025(NEW!!)
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
The sensor of the temperature measuring device shall be submerged a minimum of ____ in - ANSWER-3 (75mm) 1 / 3
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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)
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
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pg. 3 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
The minimum size sample test specimen is - ANSWER-28 L (1ft^3)
when sampling from a stationary mixer the batch must be sampled at _____ or more regularly spaced intervals during discharge of the middle portion of the batch
- ANSWER-2
The composite sample for a paving mixer must represent a minimum of _____ different portions of the batch of concrete taken from the pile after discharge -
ANSWER-5
When sampling from a revolving drum truck mixer, concrete must be sampled at a minimum of ______ regularly spaced intervals during discharge of the middle portion of the batch - ANSWER-2
Concrete samples from a truck mixer must be obtained before any water or admixtures are added to the mixer at the job site - ANSWER-False
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