MOST TESTED QUESTIONS || MOST RECENT EXAM
2026-2027 ACTUAL COMPLETE REAL EXAM
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED
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C1231 can be used instead of the capping requirements of
what practice? -
ANSWER-ASTM
C617
T/F The pads provide a uniform distribution of load from the
bearing blocks of
the testing machine by deforming in initial loading to conform
to the contour of
the ends of the cylinder. -
ANSWER-True
When qualifying unbonded caps, strengths below ___ of the
average obtained
from bonded caps is considered unacceptable. -
ANSWER-98%
, T/F C1231 contains step-by-step procedures for aligning the
specimens in the
testing machine through initial loading. -
ANSWER-True
The diameter of the pads shall not be more than ___ in. smaller
than the inside
diameter of the retaining ring. -
ANSWER-1/16
Standard test method for compressive strength of
cylindrical concrete
specimens. - ANSWER-
ASTM C39
C39 is limited to concrete have a density in excess of ___. -
ANSWER-50 lb/ft^3
How do you calculate the compressive strength according to
C39? - ANSWER-
Load/Area
Verification of the testing machine is required within __
months of the last
calibration.(C39) -
ANSWER-13
How must the machine apply the load in C39? - ANSWER-
Continuously