ACI Concrete Field-Testing Technician- Grade I Latest Update Questions & Answers.

ACI Concrete Field-Testing Technician- Grade I Latest Update Questions & Answers


ACI Concrete Field-Testing Technician- Grade I Latest
Update Questions & Answers.
The sensor of the temperature measuring device shall be submerged a minimum of
_____ in. [_____mm] into the freshly mixed concrete. - ✔✔✔-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 _____. -
✔✔✔-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 _____. - ✔✔✔-Annually, accuracy



The temperature of concrete may be measured in a wheelbarrow. True or False? - ✔✔✔-
True



The temperature of concrete may be measured in a wall form. True of False - ✔✔✔-True



A composite sample of concrete is required even if the only purpose for obtaining the
sample is to determine temperature. True or False? - ✔✔✔-False



What must be done to the sample container prior to sampling the concrete? - ✔✔✔-
Dampen (with water)



What must be done to the concrete surrounding the temperature measuring device
after the device is submerged in the fresh concrete. - ✔✔✔-Gently press the concrete
around the temperature measuring device at the surface of the concrete



®™

,ACI Concrete Field-Testing Technician- Grade I Latest Update Questions & Answers


How long must the temperature measuring device remain in the freshly mixed concrete?
- ✔✔✔-At least 2 minutes but not more than 5 minutes



After the temperature of the concrete is read, what is required? - ✔✔✔-Reporting of
temperature



The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - ✔✔✔-
1 degree F [0.5 C]



According to ASTM C1064, what is one reason to take the temperature of concrete? -
✔✔✔-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? - ✔✔✔-False



The sample of concrete used for temperature determination must be rodded 25 times.
True or False? - ✔✔✔-False



Sampling by this method is required when tests are to be made to determine _____ with
specification requirements. - ✔✔✔-Compliance



This method covers sampling from four types of mixtures which are _____, _____, _____,
and _____. - ✔✔✔-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. - ✔✔✔-15


®™

, ACI Concrete Field-Testing Technician- Grade I Latest Update Questions & Answers




Portions of a composite sample shall be thoroughly remixed bfore beginning tests on
the sample. True of False? - ✔✔✔-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. - ✔✔✔-5



The molding of strength test specimens shall begin within _____ minutes after fabricating
the composite sample. - ✔✔✔-15



The concrete sample must be protected from contamination and _____. - ✔✔✔-Rapid
evaporation



The minimum size sample for making strength test specimens is _____. - ✔✔✔-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 - ✔✔✔-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. - ✔✔✔-5



When sampling from a revolving drum truck mixer, concrete must be sampled at a
minimum of _____ regularly spaced intervals during discharge of the middle portion of
this batch. - ✔✔✔-2




®™