ACI CONCRETE FIELD TESTING
TECHNICIAN GRADE I EXAM
EXAMINATION TEST 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◉The sensor of the temperature measuring device shall be submerged a
minimum of _____ in. into the freshly mixed concrete. ANSWER: - 3
in.
◉Portions of a composite sample shall be thoroughly remixed bfore
beginning tests on the sample. True or False? ANSWER: - True
◉The temperature measuring device shall have a capacity of measuring
temperature of freshly mixed concrete to +- _____ degrees F [+- _____
C] throughout a range of _____. ANSWER: - 1 degree F, 30 degrees F
to 120 F
◉The temperature measuring device shall be calibrated _____, or
whenever there is a question of _____. ANSWER: - Annually, accuracy
◉The temperature of concrete may be measured in a wheelbarrow. True
or False? ANSWER: - True
,◉A composite sample of concrete is required even if the only purpose
for obtaining the sample is to determine temperature. True or False?
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 temperature
measuring device after the device is submerged in the fresh concrete.
ANSWER: - 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? ANSWER: - At least 2 minutes but not more
than 5 minutes
◉After the temperature of the concrete is read, what is required?
ANSWER: - Reporting of temperature
◉The temperature of concrete is reported to the nearest _____ degrees F
ANSWER: - 1 degree F
◉According to ASTM C1064, what is one reason to take the
temperature of concrete? ANSWER: - Verify conformance to a specified
requirement for temperature of concrete
, ◉A maximum temperature of freshly mixed concrete is specified in
ASTM C1064. True or False? ANSWER: - False
◉This method covers sampling from four types of mixtures which are
_____, _____, _____, and _____. ANSWER: - 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. ANSWER: - 15
◉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. 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 sources of _____ and
_____. ANSWER: - contamination and rapid evaporation
◉The minimum size sample for making strength test specimens is
_____. ANSWER: - 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
TECHNICIAN GRADE I EXAM
EXAMINATION TEST 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◉The sensor of the temperature measuring device shall be submerged a
minimum of _____ in. into the freshly mixed concrete. ANSWER: - 3
in.
◉Portions of a composite sample shall be thoroughly remixed bfore
beginning tests on the sample. True or False? ANSWER: - True
◉The temperature measuring device shall have a capacity of measuring
temperature of freshly mixed concrete to +- _____ degrees F [+- _____
C] throughout a range of _____. ANSWER: - 1 degree F, 30 degrees F
to 120 F
◉The temperature measuring device shall be calibrated _____, or
whenever there is a question of _____. ANSWER: - Annually, accuracy
◉The temperature of concrete may be measured in a wheelbarrow. True
or False? ANSWER: - True
,◉A composite sample of concrete is required even if the only purpose
for obtaining the sample is to determine temperature. True or False?
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 temperature
measuring device after the device is submerged in the fresh concrete.
ANSWER: - 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? ANSWER: - At least 2 minutes but not more
than 5 minutes
◉After the temperature of the concrete is read, what is required?
ANSWER: - Reporting of temperature
◉The temperature of concrete is reported to the nearest _____ degrees F
ANSWER: - 1 degree F
◉According to ASTM C1064, what is one reason to take the
temperature of concrete? ANSWER: - Verify conformance to a specified
requirement for temperature of concrete
, ◉A maximum temperature of freshly mixed concrete is specified in
ASTM C1064. True or False? ANSWER: - False
◉This method covers sampling from four types of mixtures which are
_____, _____, _____, and _____. ANSWER: - 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. ANSWER: - 15
◉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. 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 sources of _____ and
_____. ANSWER: - contamination and rapid evaporation
◉The minimum size sample for making strength test specimens is
_____. ANSWER: - 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
