1
ACI - Concrete Strength Testing
Technician (CSTT) Questions and
100% Accurate Answers 2026-2027.
Graded A
____ ____ can be made of glass, machined metal, polished granite, or
diabase.
C617 - ANSCapping plates
C617, 4.1
A ____ seated upper block and ____ lower block shall be on the machine.
C39 - ANSspherically, solid
C39, 6.2.4.1 & 6.2.5.1
After a specimen has been tested, record ____#, ____ load, ____ pattern,
and age of specimen. Report specimen age in days for ____ days or
greater.
C39 - ANSID# , maximum load , fracture pattern , three
C39, 10.1.1 , 10.1.4 , 10.1.7 & 10.1.9
1
, 2
After testing a beam, measure dimensions ____ at three points. Depth and
width measurements will be oriented ____. Record measurements to the
nearest ____ inch. - ANSacross the fracture
as tested
0.05"
C78, 8.1
Align the axis of the specimen with the center of thrust of the ____ block.
C39 - ANSupper bearing
C39, 8.4
Alignment of the unbonded caps can be verified after application of load, up
to ____ % of the final load.
C39 - ANS10%
C39, 8.4.2
ASTM C1231 can be used instead of the capping requirements of what
practice?
C1231 - ANSASTM C617
C1231, 4.1
ASTM C1231 contains step-by-step procedures for aligning the specimens
in the testing machine through initial loading. (T/F) - ANSFalse
2
, 3
C39, 8
ASTM C1231 establishes a maximum number of pad reuses that may not
be exceeded under any circumstances. (T/F)
C1231 - ANSFalse
C1231, 1.1
ASTM C39 is limited to concrete having a density in excess of ____ lb/ft³
(____ kg/m³).
C39 - ANS50 lb/ft³ (800 kg/m³)
C39, 1.1
Average width and depth are recorded to the nearest ___ inch.
C78 - ANS0.05" (1 mm)
C78, 8.1
Bearing faces shall be at least ___ % greater than the diameter of the
specimen.
C39 - ANS3%
C39, 6.2.2
3
ACI - Concrete Strength Testing
Technician (CSTT) Questions and
100% Accurate Answers 2026-2027.
Graded A
____ ____ can be made of glass, machined metal, polished granite, or
diabase.
C617 - ANSCapping plates
C617, 4.1
A ____ seated upper block and ____ lower block shall be on the machine.
C39 - ANSspherically, solid
C39, 6.2.4.1 & 6.2.5.1
After a specimen has been tested, record ____#, ____ load, ____ pattern,
and age of specimen. Report specimen age in days for ____ days or
greater.
C39 - ANSID# , maximum load , fracture pattern , three
C39, 10.1.1 , 10.1.4 , 10.1.7 & 10.1.9
1
, 2
After testing a beam, measure dimensions ____ at three points. Depth and
width measurements will be oriented ____. Record measurements to the
nearest ____ inch. - ANSacross the fracture
as tested
0.05"
C78, 8.1
Align the axis of the specimen with the center of thrust of the ____ block.
C39 - ANSupper bearing
C39, 8.4
Alignment of the unbonded caps can be verified after application of load, up
to ____ % of the final load.
C39 - ANS10%
C39, 8.4.2
ASTM C1231 can be used instead of the capping requirements of what
practice?
C1231 - ANSASTM C617
C1231, 4.1
ASTM C1231 contains step-by-step procedures for aligning the specimens
in the testing machine through initial loading. (T/F) - ANSFalse
2
, 3
C39, 8
ASTM C1231 establishes a maximum number of pad reuses that may not
be exceeded under any circumstances. (T/F)
C1231 - ANSFalse
C1231, 1.1
ASTM C39 is limited to concrete having a density in excess of ____ lb/ft³
(____ kg/m³).
C39 - ANS50 lb/ft³ (800 kg/m³)
C39, 1.1
Average width and depth are recorded to the nearest ___ inch.
C78 - ANS0.05" (1 mm)
C78, 8.1
Bearing faces shall be at least ___ % greater than the diameter of the
specimen.
C39 - ANS3%
C39, 6.2.2
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