ACI Written Exam | 100% Correct Answers | Verified | Latest 2024 Version
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ACI
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ACI
ACI Written Exam | 100% Correct Answers |
Verified | Latest 2024 Version
The sensor of the temperature measuring device shall be submerged a minimum of ____ in - 3
(75mm)
The temperature measuring device shall have a capacity of measuring temperature of freshly mixed
concrete to +-_____ degree...
ACI Written Exam | 100% Correct Answers |
Verified | Latest 2024 Version
The sensor of the temperature measuring device shall be submerged a minimum of ____ in - ✔✔3
(75mm)
The temperature measuring device shall have a capacity of measuring temperature of freshly mixed
concrete to +-_____ degrees F throught a range of _____ - ✔✔1(.5 degrees C), 30-120 (0-50 degrees C)
The temperature measuring device shall be calibrated____, or whenever there is a question of _____ -
✔✔annually, accuracy
The temp of concrete may be measured in a wheelbarrow - ✔✔true
the temp of concrete may be measured in a wall form - ✔✔true
A composite sample of concrete is required even if the only purpose for obtaining the sample is to
determine temp. - ✔✔false
What must be done to the sample container prior to sampling the concrete - ✔✔dampen (with water)
what must be done to the concrete surrounding the temp measuring device after the device has
submerged - ✔✔Press concrete around measuring device
How long must the temp device remain in the concrete - ✔✔at least 2 minutes (but no more than 5)
After temp of concrete is read, what then is required - ✔✔reporting of temp
the temp of concrete to be measured to the nearest ____degree F - ✔✔1 (.5 degree C)
, According to the ASTM C1064 what is one reason to take the temp of concrete - ✔✔verify conformance
to a specified requirement for temp
A max temp of concrete is specified in ASTM C1064 - ✔✔False
The sample of concrete used for temp determination must be rodded 25 times - ✔✔False
Sampling by this method is required when tests are to be made to determine ____ with specification
requirements - ✔✔compliance
The method covers sampling from four types of mixers which are _____, _____, ____, and _______ -
✔✔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 - ✔✔15
Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample -
✔✔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 - ✔✔5
the molding of strength test specimens shall begin within ____ minutes after fabricating the composite
sample - ✔✔15
The concrete sample must be protected from contamination and ____ - ✔✔rapid evaporation
The minimum size sample test specimen is - ✔✔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 - ✔✔2
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