ACI CERTIFICATION EXAM QUESTIONS WITH
CORRECT ANSWERS 2025/2026
Collecting a representative sample of concrete to be tested is as important as executing the test
methods to obtain - CORRECT ANSWER -accurate results
This practice covers sampling from four types of equipment, which are - CORRECT ANSWER -
stationary
paving
continuous
revolving drum
The elapsed time between obtaining the first and final portions of a composite sample should
not exceed - CORRECT ANSWER -15 minutes
Portions of a composite sample shall be throughly remixed before beginning tests on the
sample (T/F) - CORRECT ANSWER -true
start tests for slump, temperature, and air content within after obtaining the final portion
of the composite sample - CORRECT ANSWER -5 minutes
start molding specimens for strength tests within min after fabricating the composite
sample - CORRECT ANSWER -5 minutes
the concrete sample must be protected from contamination and - CORRECT ANSWER -moisture
loss
the minimum size sample for making strength test specimens is - CORRECT ANSWER -1 cubic
feet
, 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 - CORRECT ANSWER -2
when sampling from a paving mixer, obtain samples from at least different portions of the
pile and combine them into one composite sample for test purposes - CORRECT ANSWER -5
when sampling from a revolving truck mixer, sample the concrete by collecting or more
portions take at regularly spaced intervals during discharge of middle portion of batch -
CORRECT ANSWER -2
concrete samples from a truck mixer must be obtained before any water or admixtures are
added to the mixer at the job site - CORRECT ANSWER -false
when the concrete contains aggregate larger than that permitted for a particular test method,
the sample of concrete must be before making the test - CORRECT ANSWER -
wet sieved
the stem of the thermometer is submergerd a minimum of into the freshly mixed
concrete - CORRECT ANSWER -3"
The thermometer shall be capable of accurately measuring the temperature of freshly mixed
concrete to throughout a range of . - CORRECT ANSWER -+/- 1F
30F-120F
the thermometer shall be verified within - CORRECT ANSWER -1 year
the temperature of concrete may be measure in a wheel barrow - CORRECT ANSWER -True
CORRECT ANSWERS 2025/2026
Collecting a representative sample of concrete to be tested is as important as executing the test
methods to obtain - CORRECT ANSWER -accurate results
This practice covers sampling from four types of equipment, which are - CORRECT ANSWER -
stationary
paving
continuous
revolving drum
The elapsed time between obtaining the first and final portions of a composite sample should
not exceed - CORRECT ANSWER -15 minutes
Portions of a composite sample shall be throughly remixed before beginning tests on the
sample (T/F) - CORRECT ANSWER -true
start tests for slump, temperature, and air content within after obtaining the final portion
of the composite sample - CORRECT ANSWER -5 minutes
start molding specimens for strength tests within min after fabricating the composite
sample - CORRECT ANSWER -5 minutes
the concrete sample must be protected from contamination and - CORRECT ANSWER -moisture
loss
the minimum size sample for making strength test specimens is - CORRECT ANSWER -1 cubic
feet
, 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 - CORRECT ANSWER -2
when sampling from a paving mixer, obtain samples from at least different portions of the
pile and combine them into one composite sample for test purposes - CORRECT ANSWER -5
when sampling from a revolving truck mixer, sample the concrete by collecting or more
portions take at regularly spaced intervals during discharge of middle portion of batch -
CORRECT ANSWER -2
concrete samples from a truck mixer must be obtained before any water or admixtures are
added to the mixer at the job site - CORRECT ANSWER -false
when the concrete contains aggregate larger than that permitted for a particular test method,
the sample of concrete must be before making the test - CORRECT ANSWER -
wet sieved
the stem of the thermometer is submergerd a minimum of into the freshly mixed
concrete - CORRECT ANSWER -3"
The thermometer shall be capable of accurately measuring the temperature of freshly mixed
concrete to throughout a range of . - CORRECT ANSWER -+/- 1F
30F-120F
the thermometer shall be verified within - CORRECT ANSWER -1 year
the temperature of concrete may be measure in a wheel barrow - CORRECT ANSWER -True
