ACI Concrete Field Testing Technician-
Grade I
A 6 by way of 12 in [150 mm by 300 mm] cylinder mould may be used for concrete containing
aggregate with debris now not exceeding _____ in size, with out the want for moist sieving the
concrete. - ANS-2 in. [50 mm]
A composite sample of concrete is needed even if the simplest cause for obtaining the pattern is
to decide temperature. True of False? - ANS-False
A mallet weighing ____ should be used to faucet the perimeters of the bowl after rodding each
layer. - ANS-1.25 +- zero.50 lb. (six hundred +- 200 g)
A most temperature of freshly combined concrete is specified in ASTM C1064. True of False? -
ANS-False
A plastic field may be used for the degree in this approach. True or False? - ANS-False, degree
need to be steel or any other appropriate steel
According to ASTM C1064, what's one cause to take the temperature of concrete? - ANS-Verify
conformance to a certain requirement for temperature of concrete
After finishing the strike-off technique, what have to be done before weighing the measure and
pattern? - ANS-Clean off any excess concrete
After consolidation of the very last layer, an excess of concrete ____ above the pinnacle of the
measure is considered premier. - ANS-1/8 in. [3 mm]
After molding check specimens, you have to wait hours earlier than shifting them to the place of
preliminary garage. True or False? - ANS-False; the specimens must be moved right away
After rodding every layer, what have to be executed to the degree before adding another layer
of concrete? - ANS-Tap the perimeters of the measure well 10 to fifteen instances with the
mallet
After the very last rodding, the edges of the droop mildew need to ought to be tapped lightly with
the tamping rod. True or False? - ANS-False
After the temperature of the concrete is read, what is required? - ANS-Reporting of temperature
, Air meter bowls used for this check should comply with ASTM _____ and be calibrated for
volumee according to ASTM _____. - ANS-C231, C29
ASTM Method gives standardized necessities for _____, _____, _____, and _____, of check
specimens. - ANS-Making, curing, shielding, transporting
At the stop of the process, the air meter is _____. - ANS-Disassembled and its contents tested
Concrete mixtures with special strengths of 6000 psi [40 MPa] or more shall have an initial
curing temperature between __________. - ANS-68 and 78 degrees F [20 and 26 C]
Concrete samples from a truck mixer have to be acquired earlier than any water or admixtures
are added to the mixer at the process web page. True or False? - ANS-False
Cylinders made for the purpose of figuring out when a structure may be placed into provider
shall be eliminated from the mould __________. - ANS-At the time of the removal of formwork
Cylinders which might be to be area cured are stored __________ and guarded __________. -
ANS-In or on the shape as close to to the factor of deposit of the concrete represented as
viable; In as close to as feasible the same manner because the shaped paintings
During transportation, check specimens ought to be protected from damage due to _____,
_____, and _____. - ANS-Jarring, freezing temperatures, moisture loss
Each layer need to fill approximately _____ the extent of the mould. - ANS-One-0.33
Field Curing is the curing technique used when test specimens are to be used for __________.
- ANS-Determination of whether or not the shape is able to being placed into carrier;
Comparison with preferred cured specimens check results or with outcomes from numerous
in-region take a look at methods; Adequacy of curing and protection of concrete in the Structure,
or Form or shoring elimination time requirements
For a measure of 0.5 feet^three [14 L], what's the specified range of strokes of the tamping rod
for consolidation of every layer? - ANS-25
For concrete with a slump of much less than 1 in. [25 mm], the check specimens have to be
consolidated with the aid of _____. - ANS-Vibration
For cylinders with a diameter of 6 in. [150 mm] or greater, the tamping rod must be a spherical,
straight steel rod with a diameter of _____. - ANS-5/8 +- 1/16 in [16 mm +- 2 mm]
For use in the droop check, the give up or both ends of the tamping rod need to be _____. -
ANS-Rounded to a hemispherical tip
Grade I
A 6 by way of 12 in [150 mm by 300 mm] cylinder mould may be used for concrete containing
aggregate with debris now not exceeding _____ in size, with out the want for moist sieving the
concrete. - ANS-2 in. [50 mm]
A composite sample of concrete is needed even if the simplest cause for obtaining the pattern is
to decide temperature. True of False? - ANS-False
A mallet weighing ____ should be used to faucet the perimeters of the bowl after rodding each
layer. - ANS-1.25 +- zero.50 lb. (six hundred +- 200 g)
A most temperature of freshly combined concrete is specified in ASTM C1064. True of False? -
ANS-False
A plastic field may be used for the degree in this approach. True or False? - ANS-False, degree
need to be steel or any other appropriate steel
According to ASTM C1064, what's one cause to take the temperature of concrete? - ANS-Verify
conformance to a certain requirement for temperature of concrete
After finishing the strike-off technique, what have to be done before weighing the measure and
pattern? - ANS-Clean off any excess concrete
After consolidation of the very last layer, an excess of concrete ____ above the pinnacle of the
measure is considered premier. - ANS-1/8 in. [3 mm]
After molding check specimens, you have to wait hours earlier than shifting them to the place of
preliminary garage. True or False? - ANS-False; the specimens must be moved right away
After rodding every layer, what have to be executed to the degree before adding another layer
of concrete? - ANS-Tap the perimeters of the measure well 10 to fifteen instances with the
mallet
After the very last rodding, the edges of the droop mildew need to ought to be tapped lightly with
the tamping rod. True or False? - ANS-False
After the temperature of the concrete is read, what is required? - ANS-Reporting of temperature
, Air meter bowls used for this check should comply with ASTM _____ and be calibrated for
volumee according to ASTM _____. - ANS-C231, C29
ASTM Method gives standardized necessities for _____, _____, _____, and _____, of check
specimens. - ANS-Making, curing, shielding, transporting
At the stop of the process, the air meter is _____. - ANS-Disassembled and its contents tested
Concrete mixtures with special strengths of 6000 psi [40 MPa] or more shall have an initial
curing temperature between __________. - ANS-68 and 78 degrees F [20 and 26 C]
Concrete samples from a truck mixer have to be acquired earlier than any water or admixtures
are added to the mixer at the process web page. True or False? - ANS-False
Cylinders made for the purpose of figuring out when a structure may be placed into provider
shall be eliminated from the mould __________. - ANS-At the time of the removal of formwork
Cylinders which might be to be area cured are stored __________ and guarded __________. -
ANS-In or on the shape as close to to the factor of deposit of the concrete represented as
viable; In as close to as feasible the same manner because the shaped paintings
During transportation, check specimens ought to be protected from damage due to _____,
_____, and _____. - ANS-Jarring, freezing temperatures, moisture loss
Each layer need to fill approximately _____ the extent of the mould. - ANS-One-0.33
Field Curing is the curing technique used when test specimens are to be used for __________.
- ANS-Determination of whether or not the shape is able to being placed into carrier;
Comparison with preferred cured specimens check results or with outcomes from numerous
in-region take a look at methods; Adequacy of curing and protection of concrete in the Structure,
or Form or shoring elimination time requirements
For a measure of 0.5 feet^three [14 L], what's the specified range of strokes of the tamping rod
for consolidation of every layer? - ANS-25
For concrete with a slump of much less than 1 in. [25 mm], the check specimens have to be
consolidated with the aid of _____. - ANS-Vibration
For cylinders with a diameter of 6 in. [150 mm] or greater, the tamping rod must be a spherical,
straight steel rod with a diameter of _____. - ANS-5/8 +- 1/16 in [16 mm +- 2 mm]
For use in the droop check, the give up or both ends of the tamping rod need to be _____. -
ANS-Rounded to a hemispherical tip
