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ACI Written Exam Solved 100% Correct!
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ACI Written Exam Solved 100% Correct!
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ACI Written Exam Solved 100% Correct!The sensor of the temperature measureing device shall be submerged a minimum of ____ in CORRECT ANSWERS 3 (75mm)
The temperature measureing device shall have a capacity of measuring temperature of freshly mixed conrcrete to +-_____ degrees F throught a range of _____ CORRECT ANSWERS 1(.5 degrees C), 30-120 (0-50 degrees C)
The temperature measuring device shall be calibrated____, or whenever there is a question of _____ CORRECT ANSWERS annually, accuracy
The temp of concrete may be measured in a wheelbarrow CORRECT ANSWERS true
the temp of concrete may be measured in a wall form CORRECT ANSWERS true
A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temp. CORRECT ANSWERS false
What must be done to the sample container prior to sampling the concrete CORRECT ANSWERS dampen (with water)
what must be done to the concrete surrounding the temp measuring device after the device has submerged CORRECT ANSWERS Press concrete around measuring device
How long must the temp device remain in the concrete CORRECT ANSWERS at least 2 minutes (but no more than 5)
After temp of concrete is read, what then is required CORRECT ANSWERS reporting of
temp
the temp of concrete to be measured to the nearest ____degree F CORRECT ANSWERS 1 (.5 degree C)
According to the ASTM C1064 what is one reason to take the temp of concrete CORRECT ANSWERS verify conformance to a specified requirement for temp
A max temp of concrete is specified in ASTM C1064 CORRECT ANSWERS False
The sample of concrete used for temp determination must be rodded 25 times CORRECT ANSWERS False
Sampling by this method is required when tests are to be made to determine ____ with specification requirements CORRECT ANSWERS compliance The method covers sampling from four types of mixers which are _____, _____, ____, and _______ CORRECT ANSWERS 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 CORRECT ANSWERS 15
Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample CORRECT ANSWERS 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 CORRECT ANSWERS 5
the molding of strength test specimens shall begin within ____ minutes after fabricating the composite sample CORRECT ANSWERS 15
The concrete sample must be protected from contamination and ____ CORRECT ANSWERS rapid evaporation
The minimum size sample test specimen is CORRECT ANSWERS 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 CORRECT ANSWERS 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 CORRECT ANSWERS 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 CORRECT ANSWERS 2
Concrete samples from a truck mixer must be obtained before any water or admixtures are added to the mixer at the job site CORRECT ANSWERS False
The composite sample from a truck mixer must be obtained from the _____ portion of the batch CORRECT ANSWERS Middle
When the concrete contains aggregate larger than permitted for a particular test method, the sample fo concrete must be ______ ______ before making the test CORRECT ANSWERS Wet Sieved
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