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ACI Test with Real Questions and
Answers 2024
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The rolling process should be continued for a minimum of - ANS1min
****
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- ANS
****Specimens made for determining when a structure can be placed in service shall be
removed from their molds at the same time the formwork is removed
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- ANSF
1
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x 6in
10
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25% within a 2 minute
period
11
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- ANST
11
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25%
12
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- ANS2
12
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When vibration is used to consolidate concrete in a standard cylinder mold,
___________ layers of concrete in the mold should be used
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The standard sized compressive cylinder and flexural beam molds are used for
concrete with nominal maximum sized coarse aggregate up to _________
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The volumetric method measures the volume of air present within - ANSthe paste
fraction only

3
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- ANSa vibrator
3
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The rod should __________________________when rodding the second and third
layers of concrete in the measure
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penetrate the underlying layer about 1 inch
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Wet sieve a sufficient amount of material for the volumetric air content test over a
______ in
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5in
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- ANS1
5
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- ANS2
6
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- ANST
6
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The excess concrete above the rim of the bowl is struck off using - ANSstrike off bar
6
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ANSF
7
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5% and the aggregate correction
factor for the concrete mixture is 0
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The final air content for this mixture is - ANS5
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5% = 5
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Concrete test specimens with a specified compressive strength less than 6,000psi,
should be initially cured in a temperature range from - ANS60 to 80
7
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- ANS1 pint
8
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8
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To insure that the measure is completely full with concrete and the surface is level,
strike off the top surface of concrete using ________
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T or F - ANST
A flexural beam is filled in ______ layer(s) of approximately equal depth
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- ANST
ACI Field Testing Technicians, Grade I or equivalent certification is not required is
required when testing for slump, air content, and density, but not for making test
specimens
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release the pressure in the bowl by opening the
petcocks
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- ANSF
Begin molding test specimens within ______ minutes after obtaining the composite
sample - ANS15 minutes
Confirmation of the initial meter reading is obtained when the difference between the
initial and final meter readings are within ________ of each other
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25%
Gently press concrete around the thermometer such that the_______ does not
affect the reading
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the test is
invalid and the sample should be discarded
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- ANSthe weight and volume of the filled measure as well as the weight of
the
empty measure
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- ANST
It is allowable to use the Air Content by Pressure Method test to measure the air content
of fresh concrete made with - ANSdense aggregates only

It is permissible to use the Volumetric Method to determine the air content of fresh
concrete made with - ANSlightweight aggregates only
it may require up to ___ min before the temp stabilizes when the NMS of the coarse agg
is greater than ___ - ANS20min
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MAKING AND CURING CONCRETE - ANS
Proper consolidation of concrete in the bowl of the pressure meter is accomplished by ANSeither rodding or vibration depending on the slump of the concrete
Raise the mold vertically a distance of 12 inches - ANSin5±2seconds
SLUMP TEST - ANS
Strike off the top surface of the concrete by using - ANSeither strike off bar or plate
Submerge the sensing portion of the thermometer at least ______ inches into the
concrete - ANS3
TEMPERATURE - ANS
Test specimens shall not be transported until at least ______ hours after initial set has
occurred
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, 3 x NMS
The diameter of a cylinder mold shall be at least _______ times the nominal maximum
size of the coarse aggregate used in the concrete mixture
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5%
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3
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- ANS
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5 - 0
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2, rounded to 5
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The height of the slump cone is - ANS12 in
The length of the tamping rod for the air pressure test shall not be less than - ANS16 in

The primary objective of the sampling process is to obtain a representative sample (T or
F) - ANST
The size of the measure used in determining the density of fresh concrete _______
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is based on the nominal maximum size aggregate
The slump mold is filled with three layers of concrete - ANSby volume
The slump of a mixture is found by - ANSmeasuring the vertical distance to the
displaced original center on the top
surface of the slumped concrete
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- ANS1
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- ANS1,30to120
The Temperature Measuring Device used for determining concrete temperature must
be calibrated ______ or whenever there is a question of accuracy
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In addition, the temperature measurement must be completed within
_______ minutes after obtaining the sample
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- ANS2
When it is necessary to wet sieve the concrete sample, wet sieving should be
performed after the individual samples are remixed into a composite sample (T or F) ANSF

When sampling from a paving mixer it is not acceptable to place 3 small containers on
the sub grade in order to obtain the required samples of concrete (T or F) - ANSF
When sampling from a revolving drum truck mixer collect concrete from ______ portions
of the batch - ANS2 or more
When test specimens are to be molded, it is not necessary to determine the slump, air
content, and temperature of fresh concrete
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sieve, wet
sieve a sufficient amount of material for the air content test (ASTM C 231) over a
______ sieve - ANS1
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- ANS2
Yield represents the ________
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volume of concrete produced per batch



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