ACI - Aggregate Base Testing
Technician Exam Questions and
Answers
Testing - ANS-Sampling should be done very carefully because it is as important as
____________.
Conveyer belts
Transport units
Roadways
Stockpiles - ANS-What are the four sources from which field samples can be obtained?
contaminated, damaged - ANS-Sampling containers for aggregate samples should be
made so that the contents will not be lost, _____ or _____.
Nonrepresentative sample - ANS-Not using correct procedures for reducing samples to
testing size can result in a _____.
False - ANS-T or F
Generally, small samples are most representative of the total supply.
True - ANS-T or F
There are some instances in which differences between test samples can't be avoided.
Laws of chance - ANS-What determines whether large-size particles are equally
distributed among test samples that have been reduced?
Method A, mechanical splitter - ANS-Which method of reducing a sample must be used
with fine, dry aggregate?
Moisten the sample - ANS-What must be done to the sample if method B or C is used?
Dry the sample - ANS-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 - ANS-Method C, miniature
stockpiling, cannot be used for which type of aggregate?
Method A - ANS-Which method involves the use of chutes, holding receptacles, and
hoppers or straight-edged pans?
, 8 - ANS-Sample splitters must have how many equal width chutes for coarse
aggregate?
12 - ANS-Sample splitters must have how many equal width chutes for fine aggregate?
conical pile - ANS-In Methods B and C the sample is shoveled into a ____ before it is
flattened and divided.
Canvas blanket or tear resistant tarp - ANS-When using Method B, what is an alternate
surface that can be used when reducing the sample?
diagonally opposite - ANS-When quartering a sample, retain two _________ quarters
and reject the other two.
5, random - ANS-In miniature stockpile sampling, obtain the sample by selecting at least
____ increments of material from ____ locations in the stockpile.
60*C/140*F - ANS-The drying apparatus used for dry preparation of a sample is any
suitable device capable of drying samples at a temperature not exceeding _____.
representative, fines - ANS-A suitable sample splitter is one capable of obtaining ____
portions of the sample without appreciable loss of ____.
110, 60 - ANS-For particle size analysis, material passing a 2.00mm (No. 10) sieve is
required in amounts equal to approximately ___ g for sandy soils and approximately
___g for silty or clayey soils.
25, 10 - ANS-For specific gravity, material passing a 2.00mm (10) sieve is requires in
amounts of at least ____g when the volumetric flask is used and at least ____g when
the stoppered bottle is used.
2.00mm (No. 10), Two - ANS-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 - ANS-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 - ANS-What is defined as he water content at which the soil
passes from a plastic to a liquid?
corrosion, mass, disintegration - ANS-(LL) suitable containers should be made of
material resistant to ____ and not subject to change in ____ or ___ on repeated heating
and cooling.
Technician Exam Questions and
Answers
Testing - ANS-Sampling should be done very carefully because it is as important as
____________.
Conveyer belts
Transport units
Roadways
Stockpiles - ANS-What are the four sources from which field samples can be obtained?
contaminated, damaged - ANS-Sampling containers for aggregate samples should be
made so that the contents will not be lost, _____ or _____.
Nonrepresentative sample - ANS-Not using correct procedures for reducing samples to
testing size can result in a _____.
False - ANS-T or F
Generally, small samples are most representative of the total supply.
True - ANS-T or F
There are some instances in which differences between test samples can't be avoided.
Laws of chance - ANS-What determines whether large-size particles are equally
distributed among test samples that have been reduced?
Method A, mechanical splitter - ANS-Which method of reducing a sample must be used
with fine, dry aggregate?
Moisten the sample - ANS-What must be done to the sample if method B or C is used?
Dry the sample - ANS-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 - ANS-Method C, miniature
stockpiling, cannot be used for which type of aggregate?
Method A - ANS-Which method involves the use of chutes, holding receptacles, and
hoppers or straight-edged pans?
, 8 - ANS-Sample splitters must have how many equal width chutes for coarse
aggregate?
12 - ANS-Sample splitters must have how many equal width chutes for fine aggregate?
conical pile - ANS-In Methods B and C the sample is shoveled into a ____ before it is
flattened and divided.
Canvas blanket or tear resistant tarp - ANS-When using Method B, what is an alternate
surface that can be used when reducing the sample?
diagonally opposite - ANS-When quartering a sample, retain two _________ quarters
and reject the other two.
5, random - ANS-In miniature stockpile sampling, obtain the sample by selecting at least
____ increments of material from ____ locations in the stockpile.
60*C/140*F - ANS-The drying apparatus used for dry preparation of a sample is any
suitable device capable of drying samples at a temperature not exceeding _____.
representative, fines - ANS-A suitable sample splitter is one capable of obtaining ____
portions of the sample without appreciable loss of ____.
110, 60 - ANS-For particle size analysis, material passing a 2.00mm (No. 10) sieve is
required in amounts equal to approximately ___ g for sandy soils and approximately
___g for silty or clayey soils.
25, 10 - ANS-For specific gravity, material passing a 2.00mm (10) sieve is requires in
amounts of at least ____g when the volumetric flask is used and at least ____g when
the stoppered bottle is used.
2.00mm (No. 10), Two - ANS-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 - ANS-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 - ANS-What is defined as he water content at which the soil
passes from a plastic to a liquid?
corrosion, mass, disintegration - ANS-(LL) suitable containers should be made of
material resistant to ____ and not subject to change in ____ or ___ on repeated heating
and cooling.
