ACI Concrete Field Testing Technician- latest 2024-
2025
Quiz :The sensor of the temperature measuring device shall be submerged
a minimum of _____ in. [_____mm] into the freshly mixed concrete. -
Answer :3 in. [75 mm]
Quiz :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 [0.5 C], 30
degrees F to 120 F [0 C to 50 C]
Quiz :The temperature measuring device shall be calibrated _____, or
whenever there is a question of _____. - Answer :Annually, accuracy
Quiz :The temperature of concrete may be measured in a wheelbarrow.
True or False? - Answer :True
Quiz :The temperature of concrete may be measured in a wall form. True
of False - Answer :True
Quiz :A composite sample of concrete is required even if the only purpose
for obtaining the sample is to determine temperature. True of False? -
Answer :False
Quiz :What must be done to the sample container prior to sampling the
concrete? - Answer :Dampen (with water)
Quiz :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
Quiz :How long must the temperature measuring device remain in the
freshly mixed concrete? - Answer :At least 2 minutes but not more than 5
minutes
Quiz :After the temperature of the concrete is read, what is required? -
Answer :Reporting of temperature
Quiz :The temperature of concrete is reported to the nearest _____ degrees
F [_____ C] - Answer :1 degree F [0.5 C]
Quiz :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
Quiz :A maximum temperature of freshly mixed concrete is specified in
ASTM C1064. True of False? - Answer :False
Quiz :The sample of concrete used for temperature determination must be
rodded 25 times. True or False? - Answer :False
Quiz :Sampling by this method is required when tests are to be made to
determine _____ with specification requirements. - Answer :Compliance
Quiz :This method covers sampling from four types of mixtures which are
_____, _____, _____, and _____. - Answer :Stationary mixers, paving mixers,
revolving drum mixers, and open top mixers
, Quiz :The maximum allowable time between obtaining the first and final
portions of a composite sample is _____ minutes. - Answer :15
Quiz :Portions of a composite sample shall be thoroughly remixed bfore
beginning tests on the sample. True of False? - Answer :True
Quiz :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
Quiz :The molding of strength test specimens shall begin within _____
minutes after fabricating the composite sample. - Answer :15
Quiz :The concrete sample must be protected from contamination and
_____. - Answer :Rapid evaporation
Quiz :The minimum size sample for making strength test specimens is
_____. - Answer :28 L (1ft^3)
Quiz :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
Quiz :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
2025
Quiz :The sensor of the temperature measuring device shall be submerged
a minimum of _____ in. [_____mm] into the freshly mixed concrete. -
Answer :3 in. [75 mm]
Quiz :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 [0.5 C], 30
degrees F to 120 F [0 C to 50 C]
Quiz :The temperature measuring device shall be calibrated _____, or
whenever there is a question of _____. - Answer :Annually, accuracy
Quiz :The temperature of concrete may be measured in a wheelbarrow.
True or False? - Answer :True
Quiz :The temperature of concrete may be measured in a wall form. True
of False - Answer :True
Quiz :A composite sample of concrete is required even if the only purpose
for obtaining the sample is to determine temperature. True of False? -
Answer :False
Quiz :What must be done to the sample container prior to sampling the
concrete? - Answer :Dampen (with water)
Quiz :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
Quiz :How long must the temperature measuring device remain in the
freshly mixed concrete? - Answer :At least 2 minutes but not more than 5
minutes
Quiz :After the temperature of the concrete is read, what is required? -
Answer :Reporting of temperature
Quiz :The temperature of concrete is reported to the nearest _____ degrees
F [_____ C] - Answer :1 degree F [0.5 C]
Quiz :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
Quiz :A maximum temperature of freshly mixed concrete is specified in
ASTM C1064. True of False? - Answer :False
Quiz :The sample of concrete used for temperature determination must be
rodded 25 times. True or False? - Answer :False
Quiz :Sampling by this method is required when tests are to be made to
determine _____ with specification requirements. - Answer :Compliance
Quiz :This method covers sampling from four types of mixtures which are
_____, _____, _____, and _____. - Answer :Stationary mixers, paving mixers,
revolving drum mixers, and open top mixers
, Quiz :The maximum allowable time between obtaining the first and final
portions of a composite sample is _____ minutes. - Answer :15
Quiz :Portions of a composite sample shall be thoroughly remixed bfore
beginning tests on the sample. True of False? - Answer :True
Quiz :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
Quiz :The molding of strength test specimens shall begin within _____
minutes after fabricating the composite sample. - Answer :15
Quiz :The concrete sample must be protected from contamination and
_____. - Answer :Rapid evaporation
Quiz :The minimum size sample for making strength test specimens is
_____. - Answer :28 L (1ft^3)
Quiz :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
Quiz :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
