ACI Concrete Field Testing
Technician- Grade I Questions And
Answers
The sensor of the temperature measuring device shall be
submerged a minimum of _____ in. [_____mm] into the freshly mixed
concrete. - (correct answer) -3 in. [75 mm]
The temperature measuring device shall have a capacity of
measuring temperature of freshly mixed concrete to +- _____
degrees F [+- _____ C] throughout a range of _____. - (correct
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 _____. - (correct answer) -Annually,
accuracy
The temperature of concrete may be measured in a wheelbarrow.
True or False? - (correct answer) -True
The temperature of concrete may be measured in a wall form. True
of False - (correct 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?
- (correct answer) -False
What must be done to the sample container prior to sampling the
concrete? - (correct 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. - (correct 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? - (correct answer) -At least 2 minutes but
not more than 5 minutes
After the temperature of the concrete is read, what is required? -
(correct answer) -Reporting of temperature
The temperature of concrete is reported to the nearest _____
degrees F [_____ C] - (correct answer) -1 degree F [0.5 C]
According to ASTM C1064, what is one reason to take the
temperature of concrete? - (correct 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? - (correct answer) -False
, The sample of concrete used for temperature determination must be
rodded 25 times. True or False? - (correct answer) -False
Sampling by this method is required when tests are to be made to
determine _____ with specification requirements. - (correct answer)
-Compliance
This method covers sampling from four types of mixtures which are
_____, _____, _____, and _____. - (correct 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. - (correct answer)
-15
Portions of a composite sample shall be thoroughly remixed bfore
beginning tests on the sample. True of False? - (correct 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. - (correct answer) -5
The molding of strength test specimens shall begin within _____
minutes after fabricating the composite sample. - (correct answer) -
15
Technician- Grade I Questions And
Answers
The sensor of the temperature measuring device shall be
submerged a minimum of _____ in. [_____mm] into the freshly mixed
concrete. - (correct answer) -3 in. [75 mm]
The temperature measuring device shall have a capacity of
measuring temperature of freshly mixed concrete to +- _____
degrees F [+- _____ C] throughout a range of _____. - (correct
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 _____. - (correct answer) -Annually,
accuracy
The temperature of concrete may be measured in a wheelbarrow.
True or False? - (correct answer) -True
The temperature of concrete may be measured in a wall form. True
of False - (correct 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?
- (correct answer) -False
What must be done to the sample container prior to sampling the
concrete? - (correct 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. - (correct 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? - (correct answer) -At least 2 minutes but
not more than 5 minutes
After the temperature of the concrete is read, what is required? -
(correct answer) -Reporting of temperature
The temperature of concrete is reported to the nearest _____
degrees F [_____ C] - (correct answer) -1 degree F [0.5 C]
According to ASTM C1064, what is one reason to take the
temperature of concrete? - (correct 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? - (correct answer) -False
, The sample of concrete used for temperature determination must be
rodded 25 times. True or False? - (correct answer) -False
Sampling by this method is required when tests are to be made to
determine _____ with specification requirements. - (correct answer)
-Compliance
This method covers sampling from four types of mixtures which are
_____, _____, _____, and _____. - (correct 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. - (correct answer)
-15
Portions of a composite sample shall be thoroughly remixed bfore
beginning tests on the sample. True of False? - (correct 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. - (correct answer) -5
The molding of strength test specimens shall begin within _____
minutes after fabricating the composite sample. - (correct answer) -
15
