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ACI CERTIFICATION- CONCRETE FIELD TESTING TECHNICIAN GRADE 1 CP-1 (12)

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ACI CERTIFICATION- CONCRETE FIELD TESTING TECHNICIAN GRADE 1 CP-1 (12)

Institution
ACI
Course
ACI

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ACI CERTIFICATION- CONCRETE FIELD TESTING
TECHNICIAN GRADE 1 CP-1 (12)
ASTM C1064 - Answers -Standard Test Method For Temperature of Freshly Mixed
Hydraulic-Cement Concrete

The sensor of the temperature measuring device shall be submerged a minimum of
______ inches into the freshly mixed concrete. - Answers -3"

The temperature measuring device shall have a capacity of measuring temperature of
freshly mixed concrete to ± ______ °F throughout a range of ____________. - Answers
-1 degree, 30 degrees to 120 degrees

The temperature measuring device shall be calibrated ______ , or whenever there is a
question of ______ . - Answers -Annually, accuracy

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

The temperature of concrete may be measured in a wall form. True or False? - Answers
-True

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

What must be done to the concrete surrounding the temperature measuring device after
the device is submerged in the fresh concrete? - Answers -Close off air voids by gently
pressing the concrete around the device

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

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

The minimum size sample for making strength test specimens is _____. - Answers -1
cubic foot

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. - Answers
-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. - Answers -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
the batch. - Answers -2

Concrete samples from a truck mixer must be obtained before any water or admixtures
are added to the mixer at the job site. True or False? - Answers -False

The composite sample from a truck mixer must be obtained from the _____ portion of
the batch. - Answers -middle

When the concrete contains aggregate larger than that permitted for a particular test
method, the sample of concrete must be _____ _____ before making the test. -
Answers -wet sieved

What must occur before a sample of concrete can be taken from a revolving drum
mixer? (Oral Exam) - Answers -All of the water must be added to the mixer

Describe the different procedures that can be used to collect a sample of concrete from
a stationary or revolving drum mixer. (Oral Exam) - Answers -Repeatedly pass a
receptacle through the entire discharge stream, Completely divert the discharge stream
into a sample container

What are the required steps for collecting a sample of concrete from a stationary or
revolving drum mixer? (Oral Exam) - Answers -Collect two or more portions of concrete,
Take the portions at regularly spaced intervals, Take the portions from the middle of the
batch

Describe the procedure for collecting a sample of pavement concrete deposited on
grade. (Oral Exam) - Answers -Discharge the contents of the paving mixer, Obtain
samples from at least five different portions of the pile

What is the minimum size for a sample when strength test specimens are to be
molded? (Oral Exam) - Answers -1 cubic foot (28 L)

What is the maximum allowable time between obtaining the first and final portions of the
composite sample? (Oral Exam) - Answers -15 min.

How long must the temperature measuring device remain in the freshly mixed concrete?
- Answers -minimum of two minutes, maximum of five minutes

The temperature of the concrete is reported to the nearest ______ °F - Answers -1
degree

A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True or
False? - Answers -False

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ACI

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Uploaded on
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Number of pages
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Written in
2024/2025
Type
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