ACI Strength Exam Study Guide {latest
2026 -2027 update} questions and answers
100% correct
When qualifying unbonded caps, strengths below _____ of the average obtained from
the bonded caps is considered unacceptable. - correct answer 2%
True or false? Practice C1231/C1231M contains step-by-step procedures for aligning the
specimens in the testing machine through complete failure of the cylinder. - correct
answer True
The pads used in this practice must be _____ thick, and the diameter shall not be more
than ____ smaller than the inside diameter of the retaining ring. - correct answer 1/16
inch ... 2 mm
,The height of the metal retaining ring must be _____. - correct answer in
The inside diameter of the retaining rings shall not be less than _____ or greater than
_____ of the diameter of the cylinder. - correct answer 2 mm ...
Depressions in the ends of cylinders that exceed _____ must be corrected by sawing or
grinding prior to testing. - correct answer 1/8 inch
Qualification tests on an unbonded capping system must be repeated whenever there
are changes in _____, _____, or _____. - correct answer d
Name the maximum density required for concrete cylinder specimens to undergo the
Compressive Strength Test. - correct answer 50 pcf
,Within what time period must callibration be performed on the compressive strength
testing machine?
A. 11 months
B. 12 months
C. 13 months
D. 24 months - correct answer C. 13 months
Within what percent of the maximum load should the dial be readable within?
A. 1%
B. 2%
C. 5%
D. 10% - correct answer A. 1%
Specimens shall NOT be tested if any individual diameter of a cylider differes from the
other diameter of the same cylinder by more than:
, A. 1%
B. 2%
C. 3%
D. 4% - correct answer B. 2%
The number of individual concrete cylinders measured to determine the average
diameter may be reduced to:
A. 1 in 3 specimens
B. 1 in 10 specimens
C. 2 specimens
D. 3 specimens
E. A and C
F. B and D - correct answer F. B and D
The diameter of the concrete cylinder is measured along the:
2026 -2027 update} questions and answers
100% correct
When qualifying unbonded caps, strengths below _____ of the average obtained from
the bonded caps is considered unacceptable. - correct answer 2%
True or false? Practice C1231/C1231M contains step-by-step procedures for aligning the
specimens in the testing machine through complete failure of the cylinder. - correct
answer True
The pads used in this practice must be _____ thick, and the diameter shall not be more
than ____ smaller than the inside diameter of the retaining ring. - correct answer 1/16
inch ... 2 mm
,The height of the metal retaining ring must be _____. - correct answer in
The inside diameter of the retaining rings shall not be less than _____ or greater than
_____ of the diameter of the cylinder. - correct answer 2 mm ...
Depressions in the ends of cylinders that exceed _____ must be corrected by sawing or
grinding prior to testing. - correct answer 1/8 inch
Qualification tests on an unbonded capping system must be repeated whenever there
are changes in _____, _____, or _____. - correct answer d
Name the maximum density required for concrete cylinder specimens to undergo the
Compressive Strength Test. - correct answer 50 pcf
,Within what time period must callibration be performed on the compressive strength
testing machine?
A. 11 months
B. 12 months
C. 13 months
D. 24 months - correct answer C. 13 months
Within what percent of the maximum load should the dial be readable within?
A. 1%
B. 2%
C. 5%
D. 10% - correct answer A. 1%
Specimens shall NOT be tested if any individual diameter of a cylider differes from the
other diameter of the same cylinder by more than:
, A. 1%
B. 2%
C. 3%
D. 4% - correct answer B. 2%
The number of individual concrete cylinders measured to determine the average
diameter may be reduced to:
A. 1 in 3 specimens
B. 1 in 10 specimens
C. 2 specimens
D. 3 specimens
E. A and C
F. B and D - correct answer F. B and D
The diameter of the concrete cylinder is measured along the:
