ACI - AGGREGATE BASE TESTING TECHNICIAN
Testing - Answers :Sampling should be done very carefully because it is as important as
____________.
Conveyer belts
Transport units
Roadways
Stockpiles - Answers :What are the four sources from which field samples can be
obtained?
contaminated, damaged - Answers :Sampling containers for aggregate samples should
be made so that the contents will not be lost, _____ or _____.
Nonrepresentative sample - Answers :Not using correct procedures for reducing
samples to testing size can result in a _____.
False - Answers :T or F
Generally, small samples are most representative of the total supply.
True - Answers :T or F
There are some instances in which differences between test samples can't be avoided.
Laws of chance - Answers :What determines whether large-size particles are equally
distributed among test samples that have been reduced?
Method A, mechanical splitter - Answers :Which method of reducing a sample must be
used with fine, dry aggregate?
Moisten the sample - Answers :What must be done to the sample if method B or C is
used?
Dry the sample - Answers :What do you do if the sample is wet and Method A is to be
used?
Coarse aggregate, or mixtures of coarse and fine aggregate - Answers :Method C,
miniature stockpiling, cannot be used for which type of aggregate?
Method A - Answers :Which method involves the use of chutes, holding receptacles,
and hoppers or straight-edged pans?
8 - Answers :Sample splitters must have how many equal width chutes for coarse
aggregate?
12 - Answers :Sample splitters must have how many equal width chutes for fine
aggregate?
, conical pile - Answers :In Methods B and C the sample is shoveled into a ____ before it
is flattened and divided.
Canvas blanket or tear resistant tarp - Answers :When using Method B, what is an
alternate surface that can be used when reducing the sample?
diagonally opposite - Answers :When quartering a sample, retain two _________
quarters and reject the other two.
2.00mm (No. 10), Two - Answers :For the physical test, the remaining portion of the
material passing the _____ sieve shall be separated into ____ parts by means of a
0.425mm (40) sieve.
Pulverizing operation - Answers :For the physical test, if the sample contains brittle
particles such as flakes of mica, fragments of seashells, etc, the ____________ shall be
done carefully to free the finer material that adheres to the coarse particles.
The liquid limit of a soil - Answers :What is defined as he water content at which the soil
passes from a plastic to a liquid?
corrosion, mass, disintegration - Answers :(LL) suitable containers should be made of
material resistant to ____ and not subject to change in ____ or ___ on repeated heating
and cooling.
100g - Answers :(LL) A sample with a mass of about ___ shall be taken from the
thoroughly mixed portion of the material.
13, one half - Answers :Wear on the liquid limit device is considered excessive whe the
point of contact on the cup or base exceeds approximately ____mm in diameter, or
when any point on the rim of the cup is worn approximately ____ the original thickness.
10.0 +-0.2mm - Answers :(LL) Adjust the height of drop of the cup so tha the point on
the cup that comes in contact with the base rises to a height of____.
15-20 - Answers :When using the curved grooving tool, the soil sample shall be place in
the mixing dish and thoroughly mixed with ____ to ____mL of water by alternately and
repeatedly stirring, kneading, and chopping with a spatula.
False - Answers :T or F
Once testing has begun, additional dry soil may be added to the moistened soil if too
much water is added.
two revolutions per second, 13mm - Answers :The liquid limit device is cranked at a rate
of about _______ until the two sides of the sample come into contact at the bottom of
the groove along a distance of about ____.
Testing - Answers :Sampling should be done very carefully because it is as important as
____________.
Conveyer belts
Transport units
Roadways
Stockpiles - Answers :What are the four sources from which field samples can be
obtained?
contaminated, damaged - Answers :Sampling containers for aggregate samples should
be made so that the contents will not be lost, _____ or _____.
Nonrepresentative sample - Answers :Not using correct procedures for reducing
samples to testing size can result in a _____.
False - Answers :T or F
Generally, small samples are most representative of the total supply.
True - Answers :T or F
There are some instances in which differences between test samples can't be avoided.
Laws of chance - Answers :What determines whether large-size particles are equally
distributed among test samples that have been reduced?
Method A, mechanical splitter - Answers :Which method of reducing a sample must be
used with fine, dry aggregate?
Moisten the sample - Answers :What must be done to the sample if method B or C is
used?
Dry the sample - Answers :What do you do if the sample is wet and Method A is to be
used?
Coarse aggregate, or mixtures of coarse and fine aggregate - Answers :Method C,
miniature stockpiling, cannot be used for which type of aggregate?
Method A - Answers :Which method involves the use of chutes, holding receptacles,
and hoppers or straight-edged pans?
8 - Answers :Sample splitters must have how many equal width chutes for coarse
aggregate?
12 - Answers :Sample splitters must have how many equal width chutes for fine
aggregate?
, conical pile - Answers :In Methods B and C the sample is shoveled into a ____ before it
is flattened and divided.
Canvas blanket or tear resistant tarp - Answers :When using Method B, what is an
alternate surface that can be used when reducing the sample?
diagonally opposite - Answers :When quartering a sample, retain two _________
quarters and reject the other two.
2.00mm (No. 10), Two - Answers :For the physical test, the remaining portion of the
material passing the _____ sieve shall be separated into ____ parts by means of a
0.425mm (40) sieve.
Pulverizing operation - Answers :For the physical test, if the sample contains brittle
particles such as flakes of mica, fragments of seashells, etc, the ____________ shall be
done carefully to free the finer material that adheres to the coarse particles.
The liquid limit of a soil - Answers :What is defined as he water content at which the soil
passes from a plastic to a liquid?
corrosion, mass, disintegration - Answers :(LL) suitable containers should be made of
material resistant to ____ and not subject to change in ____ or ___ on repeated heating
and cooling.
100g - Answers :(LL) A sample with a mass of about ___ shall be taken from the
thoroughly mixed portion of the material.
13, one half - Answers :Wear on the liquid limit device is considered excessive whe the
point of contact on the cup or base exceeds approximately ____mm in diameter, or
when any point on the rim of the cup is worn approximately ____ the original thickness.
10.0 +-0.2mm - Answers :(LL) Adjust the height of drop of the cup so tha the point on
the cup that comes in contact with the base rises to a height of____.
15-20 - Answers :When using the curved grooving tool, the soil sample shall be place in
the mixing dish and thoroughly mixed with ____ to ____mL of water by alternately and
repeatedly stirring, kneading, and chopping with a spatula.
False - Answers :T or F
Once testing has begun, additional dry soil may be added to the moistened soil if too
much water is added.
two revolutions per second, 13mm - Answers :The liquid limit device is cranked at a rate
of about _______ until the two sides of the sample come into contact at the bottom of
the groove along a distance of about ____.
