CONCRETE FIELD TECHNICIAN PROFICIENCY EXAM|QUESTIONS AND VERIFIED
ANSWERS|NEW UPDATE 2026/2027|GRADED A+
This test method covers obtaining representative samples used for testing to determine compliance
with quality requirements.
CORRECT|ANSWER
ASTM C 172
Larger aggregate removal is achieved by __________.
CORRECT|ANSWER
Wet Sieving
Sample the aggregates according to which ASTM practice?
CORRECT|ANSWER
ASTM D 75
Obtaining the first and final portions of the composite sample shall not exceed_______.
CORRECT|ANSWER
15 Minutes
Slump, Air Entrainment and Temperature are to be started within how many minutes?
CORRECT|ANSWER
5 Minutes
,Start molding strength test specimens within how many minutes after fabricating the final portion of the
composite sample?
CORRECT|ANSWER
15 minutes
Minimum size sample for a strength test specimen?
CORRECT|ANSWER
1 cu./ft.
Sampling from a stationary mixer requires ______ or more portions, regularly spaced intervals, from the
middle portion of the batch.
CORRECT|ANSWER
2
When sampling freshly mixed concrete, do not obtain portions of concrete from __________.
CORRECT|ANSWER
both the beginning and final portions of the batch.
Completely divert the discharge stream or pass a receptacle completely through the discharge stream to
obtain samples of freshly mixed concrete.
CORRECT|ANSWER
True
Sampling from a paving mixer requires ________ or more portions of the discharge pile.
CORRECT|ANSWER
, 5
Two or more regularly spaced portions of the ________ of the batch is required when sampling from a
revolving drum mixer or agitator.
CORRECT|ANSWER
middle portion
Samples are to be obtained before water or admixtures are added to the batch.
CORRECT|ANSWER
False
Sampling from a continuous mixer requires 5 ft³ of discharged concrete before taking how many
portions of concrete?
CORRECT|ANSWER
2 or more
When aggregate exceeds the maximum allowed for the mold or equipment, what is needed to be done?
CORRECT|ANSWER
Wet Sieve
ASTM C-1064 covers the determination of __________ for freshly mixed concrete.
CORRECT|ANSWER
Temperature
ANSWERS|NEW UPDATE 2026/2027|GRADED A+
This test method covers obtaining representative samples used for testing to determine compliance
with quality requirements.
CORRECT|ANSWER
ASTM C 172
Larger aggregate removal is achieved by __________.
CORRECT|ANSWER
Wet Sieving
Sample the aggregates according to which ASTM practice?
CORRECT|ANSWER
ASTM D 75
Obtaining the first and final portions of the composite sample shall not exceed_______.
CORRECT|ANSWER
15 Minutes
Slump, Air Entrainment and Temperature are to be started within how many minutes?
CORRECT|ANSWER
5 Minutes
,Start molding strength test specimens within how many minutes after fabricating the final portion of the
composite sample?
CORRECT|ANSWER
15 minutes
Minimum size sample for a strength test specimen?
CORRECT|ANSWER
1 cu./ft.
Sampling from a stationary mixer requires ______ or more portions, regularly spaced intervals, from the
middle portion of the batch.
CORRECT|ANSWER
2
When sampling freshly mixed concrete, do not obtain portions of concrete from __________.
CORRECT|ANSWER
both the beginning and final portions of the batch.
Completely divert the discharge stream or pass a receptacle completely through the discharge stream to
obtain samples of freshly mixed concrete.
CORRECT|ANSWER
True
Sampling from a paving mixer requires ________ or more portions of the discharge pile.
CORRECT|ANSWER
, 5
Two or more regularly spaced portions of the ________ of the batch is required when sampling from a
revolving drum mixer or agitator.
CORRECT|ANSWER
middle portion
Samples are to be obtained before water or admixtures are added to the batch.
CORRECT|ANSWER
False
Sampling from a continuous mixer requires 5 ft³ of discharged concrete before taking how many
portions of concrete?
CORRECT|ANSWER
2 or more
When aggregate exceeds the maximum allowed for the mold or equipment, what is needed to be done?
CORRECT|ANSWER
Wet Sieve
ASTM C-1064 covers the determination of __________ for freshly mixed concrete.
CORRECT|ANSWER
Temperature
