ACI Strength Exam Study Guide {latest
2026 -2027 update} questions and answers
100% correct
The technician should remove all _____ or _____ materials from the ends of hardened
concrete cylinders before capping. - correct answer debris ... foreign
_____ the pot and recharge the fresh material at intervals to ensure that the oldest
material has not been used more than _____ times. - correct answer Stir ... five
True or false? When capping concrete cylinders with a comprehensive strength of 35
MPa [5000 psi] or greater, it is permitted to reuse compound recovered from the
capping operation or old caps. - correct answer True
,To avoid _____, the sulfur mortar should be dry when it is added to the pot. It should be
kept away from _____ when heating. - correct answer cracking ... moisture
The melting pot for the sulfur mortar must be located under a _____ with an _____ for
_____. - correct answer hood ... ventilation
Hydrogen sulfide gas, which may be produced during capping, may be _____ in high
concentrations. In lower concentrations, the gas may result in _____, _____, _____, _____,
and _____. - correct answer released
Unbonded caps may NOT be used for acceptance testing of concrete with compressive
strengths below ... or above ... . - correct answer 1500 psi [10 MPa] ... 12000 psi [80 Mpa]
Elastomeric pads should not be more than ... smaller than the inside diameter of the
retaining ring. - correct answer 1/16th inch [2 mm]
,For a neoprene pad of a a compressive strength of 13000 psi [89 MPa], what are the
maximum reuses of the pad? - correct answer 50
For a neoprene pad of a a compressive strength of 10000 psi [80 MPa], what are the
maximum reuses of the pad? - correct answer 100
For a neoprene pad of a a compressive strength of 5000 psi [34 MPa], what are the
maximum reuses of the pad? - correct answer 100
For a neoprene pad of a a compressive strength of 4000 psi [28 MPa], what are the
maximum reuses of the pad? - correct answer 100
For a neoprene pad of a a compressive strength of greater than 1000 psi [7 MPa], what
are the maximum reuses of the pad? - correct answer N/A (the test is not permitted)
, Only those tests or reuses within ... of the highest strength level will actually be
included in the reuse count. - correct answer 2000 psi [14 MPa]
True or false? Laboratories must maintain records of the number of times that the
pads are reused. - correct answer True
True or false? The unbonded end cap may be used greater than 50 times. - correct
answer True, if the compresive strength is less than 7000 psi [50 MPA]
After 50 uses, test results may be used for greater than 50 times at...
A. ±5000 psi of average strength
B. ±5000 psi of highest strength
C. ±2000 psi of average strength
D. ±2000 psi of highest strength - correct answer D. ±2000 psi of highest strength
2026 -2027 update} questions and answers
100% correct
The technician should remove all _____ or _____ materials from the ends of hardened
concrete cylinders before capping. - correct answer debris ... foreign
_____ the pot and recharge the fresh material at intervals to ensure that the oldest
material has not been used more than _____ times. - correct answer Stir ... five
True or false? When capping concrete cylinders with a comprehensive strength of 35
MPa [5000 psi] or greater, it is permitted to reuse compound recovered from the
capping operation or old caps. - correct answer True
,To avoid _____, the sulfur mortar should be dry when it is added to the pot. It should be
kept away from _____ when heating. - correct answer cracking ... moisture
The melting pot for the sulfur mortar must be located under a _____ with an _____ for
_____. - correct answer hood ... ventilation
Hydrogen sulfide gas, which may be produced during capping, may be _____ in high
concentrations. In lower concentrations, the gas may result in _____, _____, _____, _____,
and _____. - correct answer released
Unbonded caps may NOT be used for acceptance testing of concrete with compressive
strengths below ... or above ... . - correct answer 1500 psi [10 MPa] ... 12000 psi [80 Mpa]
Elastomeric pads should not be more than ... smaller than the inside diameter of the
retaining ring. - correct answer 1/16th inch [2 mm]
,For a neoprene pad of a a compressive strength of 13000 psi [89 MPa], what are the
maximum reuses of the pad? - correct answer 50
For a neoprene pad of a a compressive strength of 10000 psi [80 MPa], what are the
maximum reuses of the pad? - correct answer 100
For a neoprene pad of a a compressive strength of 5000 psi [34 MPa], what are the
maximum reuses of the pad? - correct answer 100
For a neoprene pad of a a compressive strength of 4000 psi [28 MPa], what are the
maximum reuses of the pad? - correct answer 100
For a neoprene pad of a a compressive strength of greater than 1000 psi [7 MPa], what
are the maximum reuses of the pad? - correct answer N/A (the test is not permitted)
, Only those tests or reuses within ... of the highest strength level will actually be
included in the reuse count. - correct answer 2000 psi [14 MPa]
True or false? Laboratories must maintain records of the number of times that the
pads are reused. - correct answer True
True or false? The unbonded end cap may be used greater than 50 times. - correct
answer True, if the compresive strength is less than 7000 psi [50 MPA]
After 50 uses, test results may be used for greater than 50 times at...
A. ±5000 psi of average strength
B. ±5000 psi of highest strength
C. ±2000 psi of average strength
D. ±2000 psi of highest strength - correct answer D. ±2000 psi of highest strength
