ACI CONCRETE FIELD-TESTING TECHNICIAN EXAM
ACTUAL EXAM 2026 (GRADE I EXAM) | ALL
QUESTIONS AND CORRECT ANSWERS | JUST
RELEASED | VERIFIED ANSWERS
The sample of concrete for use in making the slump test must be
obained in accordance with ASTM Standard _____. ------------Correct
Answer--------------------C172, Standard Practice for Sampling Freshly
Mixed Concrete
The slump mold should be in a dry condition before beginning the test.
True or False? ------------Correct Answer--------------------False
The surface on which the slump mold will be placed must be _____. ----
--------Correct Answer--------------------Flat, level, moist, nonabsorbent,
and free of vibration
The slump mold is filled in _____ layers. ------------Correct Answer---------
-----------3
,Each layer should fill approximately _____ the volume of the mold. ------
------Correct Answer--------------------One-third
The approximate concrete depth (in verticle distance) after placing the
first layer is _____, and the second layer is _____. ------------Correct
Answer--------------------2 5/8 in. [70 mm], 6 1/8 in. [160 mm]
What is the specified number of roddings for each layer? ------------
Correct Answer--------------------25
What is the specified size of the mallet required for this test method
when the measuring bowl has the capacity of 14 L [0.5 ft^3] or less? ----
--------Correct Answer--------------------0.60 +- 0.25 kg [1.25 +- 0.50 lb.]
The sample of concrete used for this test is to be obtained in
accordance with what ASTM Standard? ------------Correct Answer----------
----------C172
The maximum size aggregate allowed for this test method is _____. -----
-------Correct Answer--------------------50 mm (2 in.)
,If the concrete contains aggregate larger than the maximum allowed
for this test, the sample must be _____. ------------Correct Answer---------
-----------Wet sieved over a 1 1/2 in. (37.5 mm) sieve
If the concrete sample is to be consolidated by rodding, the measure is
filled in _____ layers. ------------Correct Answer--------------------3 equal
If the concrete sample is to be consolidated by vibration, the measure is
filled in _____ layers. ------------Correct Answer--------------------2 equal
When rodding the concrete sample, what is the specified number of
strokes required for each layer? ------------Correct Answer--------------------
25
Vibration of the concrete sample is not allowed when the slump of
concrete exceeds _____. ------------Correct Answer--------------------75 mm
(3 in.)
, In rodding the sample, how deep should the rod penetrate each layer? -
-----------Correct Answer--------------------Rod bottom layer to full depth;
rod second and final layer penetrating the previous layer about 25 mm
(1 in.)
After rodding each layer, what should be done to the measure before
adding another layer of concrete? ------------Correct Answer-----------------
---Tap the sides of the measure smartly 10 to 15 times with the mallet
How deep should the tamping rod penetrate into each layer? ------------
Correct Answer--------------------Rod each layer throughout its depth; on
the second and final layers, the rod should penetrate into the previous
layer approximately 1 in. [25 mm]
When rodding the bottom layer, the tamping rod must be _____ to
uniformly distribute the strokes. ------------Correct Answer-------------------
-Slightly inclined
What must be done if the concrete drops below the top of the slump
mold while the top layer is being rodded? ------------Correct Answer-------
ACTUAL EXAM 2026 (GRADE I EXAM) | ALL
QUESTIONS AND CORRECT ANSWERS | JUST
RELEASED | VERIFIED ANSWERS
The sample of concrete for use in making the slump test must be
obained in accordance with ASTM Standard _____. ------------Correct
Answer--------------------C172, Standard Practice for Sampling Freshly
Mixed Concrete
The slump mold should be in a dry condition before beginning the test.
True or False? ------------Correct Answer--------------------False
The surface on which the slump mold will be placed must be _____. ----
--------Correct Answer--------------------Flat, level, moist, nonabsorbent,
and free of vibration
The slump mold is filled in _____ layers. ------------Correct Answer---------
-----------3
,Each layer should fill approximately _____ the volume of the mold. ------
------Correct Answer--------------------One-third
The approximate concrete depth (in verticle distance) after placing the
first layer is _____, and the second layer is _____. ------------Correct
Answer--------------------2 5/8 in. [70 mm], 6 1/8 in. [160 mm]
What is the specified number of roddings for each layer? ------------
Correct Answer--------------------25
What is the specified size of the mallet required for this test method
when the measuring bowl has the capacity of 14 L [0.5 ft^3] or less? ----
--------Correct Answer--------------------0.60 +- 0.25 kg [1.25 +- 0.50 lb.]
The sample of concrete used for this test is to be obtained in
accordance with what ASTM Standard? ------------Correct Answer----------
----------C172
The maximum size aggregate allowed for this test method is _____. -----
-------Correct Answer--------------------50 mm (2 in.)
,If the concrete contains aggregate larger than the maximum allowed
for this test, the sample must be _____. ------------Correct Answer---------
-----------Wet sieved over a 1 1/2 in. (37.5 mm) sieve
If the concrete sample is to be consolidated by rodding, the measure is
filled in _____ layers. ------------Correct Answer--------------------3 equal
If the concrete sample is to be consolidated by vibration, the measure is
filled in _____ layers. ------------Correct Answer--------------------2 equal
When rodding the concrete sample, what is the specified number of
strokes required for each layer? ------------Correct Answer--------------------
25
Vibration of the concrete sample is not allowed when the slump of
concrete exceeds _____. ------------Correct Answer--------------------75 mm
(3 in.)
, In rodding the sample, how deep should the rod penetrate each layer? -
-----------Correct Answer--------------------Rod bottom layer to full depth;
rod second and final layer penetrating the previous layer about 25 mm
(1 in.)
After rodding each layer, what should be done to the measure before
adding another layer of concrete? ------------Correct Answer-----------------
---Tap the sides of the measure smartly 10 to 15 times with the mallet
How deep should the tamping rod penetrate into each layer? ------------
Correct Answer--------------------Rod each layer throughout its depth; on
the second and final layers, the rod should penetrate into the previous
layer approximately 1 in. [25 mm]
When rodding the bottom layer, the tamping rod must be _____ to
uniformly distribute the strokes. ------------Correct Answer-------------------
-Slightly inclined
What must be done if the concrete drops below the top of the slump
mold while the top layer is being rodded? ------------Correct Answer-------
