ACI CONCRETE FIELD TESTING TECHNICIAN
GRADE I COMPREHENSIVE ASSESSMENT
◉ 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]
◉ 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
◉ The temperature of concrete may be measured in a wall form.
True of False Answer: True
◉ 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
◉ 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 [_____ C] Answer: 1 degree F [0.5 C]
◉ 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 of False? Answer: False
◉ The sample of concrete used for temperature determination must
be rodded 25 times. True or False? Answer: False
, ◉ Sampling by this method is required when tests are to be made to
determine _____ with specification requirements. Answer:
Compliance
◉ 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
◉ Portions of a composite sample shall be thoroughly remixed bfore
beginning tests on the sample. True of False? Answer: True
◉ 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 contamination and
_____. Answer: Rapid evaporation
GRADE I COMPREHENSIVE ASSESSMENT
◉ 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]
◉ 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
◉ The temperature of concrete may be measured in a wall form.
True of False Answer: True
◉ 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
◉ 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 [_____ C] Answer: 1 degree F [0.5 C]
◉ 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 of False? Answer: False
◉ The sample of concrete used for temperature determination must
be rodded 25 times. True or False? Answer: False
, ◉ Sampling by this method is required when tests are to be made to
determine _____ with specification requirements. Answer:
Compliance
◉ 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
◉ Portions of a composite sample shall be thoroughly remixed bfore
beginning tests on the sample. True of False? Answer: True
◉ 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 contamination and
_____. Answer: Rapid evaporation
