1
ACI
ACI Concrete Field-Testing Technician |
Exam | Questions & Answers | Grade A|
100% Correct | (NEW 2025/ 2026)
What must be done to the concrete surrounding the temperature measuring device after
the device is submerged in the fresh concrete. - ANS ✓Gently press the concrete around
the temperature measuring device at the surface of the concrete
How long must the temperature measuring device remain in the freshly mixed concrete?
- ANS ✓At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required? - ANS ✓Reporting of
temperature
The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - ANS ✓1
degree F [0.5 C]
According to ASTM C1064, what is one reason to take the temperature of concrete? -
ANS ✓Verify conformance to a specified requirement for temperature of concrete
ACI
, 2
ACI
A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True of
False? - ANS ✓False
The sample of concrete used for temperature determination must be rodded 25 times.
True or False? - ANS ✓False
Sampling by this method is required when tests are to be made to determine _____ with
specification requirements. - ANS ✓Compliance
This method covers sampling from four types of mixtures which are _____, _____, _____, and
_____. - ANS ✓Stationary mixers, 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. - ANS ✓15
Portions of a composite sample shall be thoroughly remixed bfore beginning tests on the
sample. True of False? - ANS ✓True
ACI
, 3
ACI
The maximum elapsed time allowed between obtaining the final portion of the
composite sample and beginning the tests for slump, temperature, and air content is
_____ minutes. - ANS ✓5
The molding of strength test specimens shall begin within _____ minutes after fabricating
the composite sample. - ANS ✓15
The concrete sample must be protected from contamination and _____. - ANS ✓Rapid
evaporation
The minimum size sample for making strength test specimens is _____. - ANS ✓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 - ANS ✓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. - ANS ✓5
ACI
ACI
ACI Concrete Field-Testing Technician |
Exam | Questions & Answers | Grade A|
100% Correct | (NEW 2025/ 2026)
What must be done to the concrete surrounding the temperature measuring device after
the device is submerged in the fresh concrete. - ANS ✓Gently press the concrete around
the temperature measuring device at the surface of the concrete
How long must the temperature measuring device remain in the freshly mixed concrete?
- ANS ✓At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required? - ANS ✓Reporting of
temperature
The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - ANS ✓1
degree F [0.5 C]
According to ASTM C1064, what is one reason to take the temperature of concrete? -
ANS ✓Verify conformance to a specified requirement for temperature of concrete
ACI
, 2
ACI
A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True of
False? - ANS ✓False
The sample of concrete used for temperature determination must be rodded 25 times.
True or False? - ANS ✓False
Sampling by this method is required when tests are to be made to determine _____ with
specification requirements. - ANS ✓Compliance
This method covers sampling from four types of mixtures which are _____, _____, _____, and
_____. - ANS ✓Stationary mixers, 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. - ANS ✓15
Portions of a composite sample shall be thoroughly remixed bfore beginning tests on the
sample. True of False? - ANS ✓True
ACI
, 3
ACI
The maximum elapsed time allowed between obtaining the final portion of the
composite sample and beginning the tests for slump, temperature, and air content is
_____ minutes. - ANS ✓5
The molding of strength test specimens shall begin within _____ minutes after fabricating
the composite sample. - ANS ✓15
The concrete sample must be protected from contamination and _____. - ANS ✓Rapid
evaporation
The minimum size sample for making strength test specimens is _____. - ANS ✓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 - ANS ✓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. - ANS ✓5
ACI
