ACI CONCRETE STRENGTH TESTING TECHNICIAN
SAMPLE WRITTEN EXAM QUESTIONS
A) - ANSWER-The maximum allowable depth of depressions in the ends of cylinders that need
not be sawed or ground in: a) 5 mm [0.20 in.] b) 6 mm [0.24 in.] c) 8 mm [0.31 in.] d) 9 mm
[0.35 in.]
E) - ANSWER-These procedures for capping enable concrete cylinders and cores to meet the
standard's requirements for: a) planeness b)strength c) perpendicularity d) B and C e) A and C
E) - ANSWER-The strength of the neat hydraulic cement paste used for capping cylinders
depends on: a) the water/cement ratio b) time c) its consistency d) the type of cement e) all of the
above
B) - ANSWER-Practie C1231/C1231M contains step-by-step procedures for aligning the
specimens in the testing machine through initial application of the load: a) True b) False
A) - ANSWER-This test method consists of applying a compressive axial load to molded
cylinders or cores at a rate which is within a prescribed range until failure occurs: a) True b)
False
B) - ANSWER-The percent error for loads used in the testing machine should not exceed ___
percent of the indicated load: a) +/- 0.05% b) +/- 1.0% c) +/- 0.5% d) +/- 1.5% e) +/- 2.0%
B) - ANSWER-To determine the average width, depth, and line of fracture location of the
specimen, you should take ___ measurements across each dimension: a) 2 b) 3 c) 4 d) 5
C) - ANSWER-The final report should include both the average width and depth to the nearest:
a) 25.4 mm [1 in.] b) 12.7 mm [0.5 in.] c) 1 mm [0.05 in.] d) 6.4 mm [0.25 in.]
SAMPLE WRITTEN EXAM QUESTIONS
A) - ANSWER-The maximum allowable depth of depressions in the ends of cylinders that need
not be sawed or ground in: a) 5 mm [0.20 in.] b) 6 mm [0.24 in.] c) 8 mm [0.31 in.] d) 9 mm
[0.35 in.]
E) - ANSWER-These procedures for capping enable concrete cylinders and cores to meet the
standard's requirements for: a) planeness b)strength c) perpendicularity d) B and C e) A and C
E) - ANSWER-The strength of the neat hydraulic cement paste used for capping cylinders
depends on: a) the water/cement ratio b) time c) its consistency d) the type of cement e) all of the
above
B) - ANSWER-Practie C1231/C1231M contains step-by-step procedures for aligning the
specimens in the testing machine through initial application of the load: a) True b) False
A) - ANSWER-This test method consists of applying a compressive axial load to molded
cylinders or cores at a rate which is within a prescribed range until failure occurs: a) True b)
False
B) - ANSWER-The percent error for loads used in the testing machine should not exceed ___
percent of the indicated load: a) +/- 0.05% b) +/- 1.0% c) +/- 0.5% d) +/- 1.5% e) +/- 2.0%
B) - ANSWER-To determine the average width, depth, and line of fracture location of the
specimen, you should take ___ measurements across each dimension: a) 2 b) 3 c) 4 d) 5
C) - ANSWER-The final report should include both the average width and depth to the nearest:
a) 25.4 mm [1 in.] b) 12.7 mm [0.5 in.] c) 1 mm [0.05 in.] d) 6.4 mm [0.25 in.]
