ACI Strength Exam Study Guide {latest
2026 -2027 update} questions and answers
100% correct
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:
A. Top
B. Middle
,C. Bottom
D. Top and Bottom - correct answer B. Middle
The designated loading rate of movement of the compression machine shall e
maintained at lease during the:
A. First half of the loading phase
B. The latter half of the loading phase
C. Both A and C
D. None of the above - correct answer B. The latter half of the loading phase
Name the loading rate of the compression machine. - correct answer 35 ± 7 psi
The average compresive strength of a concrete cylinder specimen is to be reported to
the nearest:
A. 1 psi [0.007 MPa]
,B. 10 psi [.07 MPa]
C. 50 psi [0.3 MPa]
D. 100 psi [0.7 MPa) - correct answer B. 10 psi [.07 Mpa]
True or false? This test method measures the compresive strength of cylindrical
concrete specimens that have a density of LESS than 50 lb/ft^3 [800 kg/m^3] - correct
answer True
True or false? Test Method C39/C39M consists of applying a compressive axial load to
molded cylinders or cores at any rate until failure occurs. - correct answer True
Results obtained from the compressive strength test method will depend on many
things, such as the size of and _____ of the specimen, batching, _____ procedures, the
age, temperature, and _____ conditions during curing. - correct answer
perpendicularity ... loading ... settling
, This test method is used to determine _____ of cylindrical specimens. - correct answer
strength
The calibration of the testing machines must be verified under four conditions:
I. within ____ months of the previous calibration
II. upon original installation or after _____
III. after making _____ or adjustments
IV. whenever there is reason to suspect the _____ of the indicated loads. - correct
answer 13 ...
True or false? The machine msut be power operated and apply the load intermittently. -
correct answer False
2026 -2027 update} questions and answers
100% correct
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:
A. Top
B. Middle
,C. Bottom
D. Top and Bottom - correct answer B. Middle
The designated loading rate of movement of the compression machine shall e
maintained at lease during the:
A. First half of the loading phase
B. The latter half of the loading phase
C. Both A and C
D. None of the above - correct answer B. The latter half of the loading phase
Name the loading rate of the compression machine. - correct answer 35 ± 7 psi
The average compresive strength of a concrete cylinder specimen is to be reported to
the nearest:
A. 1 psi [0.007 MPa]
,B. 10 psi [.07 MPa]
C. 50 psi [0.3 MPa]
D. 100 psi [0.7 MPa) - correct answer B. 10 psi [.07 Mpa]
True or false? This test method measures the compresive strength of cylindrical
concrete specimens that have a density of LESS than 50 lb/ft^3 [800 kg/m^3] - correct
answer True
True or false? Test Method C39/C39M consists of applying a compressive axial load to
molded cylinders or cores at any rate until failure occurs. - correct answer True
Results obtained from the compressive strength test method will depend on many
things, such as the size of and _____ of the specimen, batching, _____ procedures, the
age, temperature, and _____ conditions during curing. - correct answer
perpendicularity ... loading ... settling
, This test method is used to determine _____ of cylindrical specimens. - correct answer
strength
The calibration of the testing machines must be verified under four conditions:
I. within ____ months of the previous calibration
II. upon original installation or after _____
III. after making _____ or adjustments
IV. whenever there is reason to suspect the _____ of the indicated loads. - correct
answer 13 ...
True or false? The machine msut be power operated and apply the load intermittently. -
correct answer False
