ACI Written Exam Questions With Complete Solutions
a 6 in by 12 in cylinder mold can be used for concrete
containing aggregate with particles not exceeding _____ in size,
without the need for wet sieving concrete Correct Answers 2
in (50 mm)
A composite sample of concrete is required even if the only
purpose for obtaining the sample is to determine temp. Correct
Answers false
A mallet weighing ____ must be used to tap the sides of the
bowl after rodding each layer Correct Answers 1.25 +-.5 lb
A max temp of concrete is specified in ASTM C1064 Correct
Answers False
A plastic container can be used for the measure in this method
Correct Answers False
According to the ASTM C1064 what is one reason to take the
temp of concrete Correct Answers verify conformance to a
specified requirement for temp
After completing the strike off procedure, what must be done
before weighing the measure and the sample Correct Answers
Clean off any excess concrete
After consolidation of the final layer, an excess of concrete
_______ above the top of the measure is considered optimum
Correct Answers 1/8 in(3mm)
,After final rodding the sides of the mold should be tapped
lightly Correct Answers False
After molding test specimens, you should wait two hours before
moving them to the location of initial storage Correct Answers
false (the specimens must be moved immediately)
After temp of concrete is read, what then is required Correct
Answers reporting of temp
air meter bowls used for this test must conform to ASTM _____
and be calibrated for volume according to ASTM Correct
Answers C231, C29
ASTM Method C31 gives standardized rquirements for ____,
____, ____, and ____ of test specimens Correct Answers
making, curing, protecting and transporting
At the end of the procedure the air meter is Correct Answers
disassembled and its contents are examined
Concrete mixtures with spec strengths of 600 psi or greater shall
have an initial curing temp between Correct Answers 68 and
78 degrees F (20 and 26 C)
Concrete samples from a truck mixer must be obtained before
any water or admixtures are added to the mixer at the job site
Correct Answers False
, Cylinders made for the purpose of determining when a structure
may be put into service shall be removed form the molds
Correct Answers at the time of removal of formwork
cylinders that are to be field cured are stored _____ and
protected Correct Answers In or on the structure as near to the
point of deposit of the concrete represented as possible
During transportation, test specimens must be protected form
damage due to _____, ______ and ______ Correct Answers
Jarring, freezing temps, moisture loss
Each layer should fill approx ____ volume of the mold Correct
Answers One third
Field curing is the curing method used for when Correct
Answers Determination of whether structure is capable of
being put into service
for a measure of 0.5ft^3 what is the required number of strokes
of the tamping rod for consolidation of each later Correct
Answers 25
For concrete with a slump of less than 1 in ( 25mm) Correct
Answers vibration
For cylinders with a diameter of 6 in or greater the tamping rod
must be a round, straight steel rod with a diameter Correct
Answers 5/8 in +-1/16 in (16mm +-2mm)
a 6 in by 12 in cylinder mold can be used for concrete
containing aggregate with particles not exceeding _____ in size,
without the need for wet sieving concrete Correct Answers 2
in (50 mm)
A composite sample of concrete is required even if the only
purpose for obtaining the sample is to determine temp. Correct
Answers false
A mallet weighing ____ must be used to tap the sides of the
bowl after rodding each layer Correct Answers 1.25 +-.5 lb
A max temp of concrete is specified in ASTM C1064 Correct
Answers False
A plastic container can be used for the measure in this method
Correct Answers False
According to the ASTM C1064 what is one reason to take the
temp of concrete Correct Answers verify conformance to a
specified requirement for temp
After completing the strike off procedure, what must be done
before weighing the measure and the sample Correct Answers
Clean off any excess concrete
After consolidation of the final layer, an excess of concrete
_______ above the top of the measure is considered optimum
Correct Answers 1/8 in(3mm)
,After final rodding the sides of the mold should be tapped
lightly Correct Answers False
After molding test specimens, you should wait two hours before
moving them to the location of initial storage Correct Answers
false (the specimens must be moved immediately)
After temp of concrete is read, what then is required Correct
Answers reporting of temp
air meter bowls used for this test must conform to ASTM _____
and be calibrated for volume according to ASTM Correct
Answers C231, C29
ASTM Method C31 gives standardized rquirements for ____,
____, ____, and ____ of test specimens Correct Answers
making, curing, protecting and transporting
At the end of the procedure the air meter is Correct Answers
disassembled and its contents are examined
Concrete mixtures with spec strengths of 600 psi or greater shall
have an initial curing temp between Correct Answers 68 and
78 degrees F (20 and 26 C)
Concrete samples from a truck mixer must be obtained before
any water or admixtures are added to the mixer at the job site
Correct Answers False
, Cylinders made for the purpose of determining when a structure
may be put into service shall be removed form the molds
Correct Answers at the time of removal of formwork
cylinders that are to be field cured are stored _____ and
protected Correct Answers In or on the structure as near to the
point of deposit of the concrete represented as possible
During transportation, test specimens must be protected form
damage due to _____, ______ and ______ Correct Answers
Jarring, freezing temps, moisture loss
Each layer should fill approx ____ volume of the mold Correct
Answers One third
Field curing is the curing method used for when Correct
Answers Determination of whether structure is capable of
being put into service
for a measure of 0.5ft^3 what is the required number of strokes
of the tamping rod for consolidation of each later Correct
Answers 25
For concrete with a slump of less than 1 in ( 25mm) Correct
Answers vibration
For cylinders with a diameter of 6 in or greater the tamping rod
must be a round, straight steel rod with a diameter Correct
Answers 5/8 in +-1/16 in (16mm +-2mm)
