ACI AGGREGATE BASE TESTING TECHNICIAN EXAM QUESTIONS
AND VERIFIED ANSWERS
(D75) Sampling should be done very carefully because it is as important as _____.
Testing
The _____ or _____ should obtain samples related to the control of production at
the source or related to the control of the work at the site.
Manufacturers, contractors
Samples to be tested for quality should, when possible, be obtained from the
_____.
Finished product
(D75) Sampling containers for aggregate samples should be made so that the
contents will not be lost, ____ or ___.
Contaminated or damaged
The reason it is difficult to obtain unbiased samples from stockpiles is because
coarse and fine particles become segregated. True or False?
True
____ can help in obtaining accurate samples from stockpiles.
Power equipment
(D75)What are the four sources from which field samples can be obtained?
Conveyer belts
Transport units
Roadways
Stockpiles
Not using correct procedures for reducing samples to testing size can result in a
_____.
Nonrepresentative sample
T or F
Generally, small samples are most representative of the total supply.
False
, T or F
There are some instances in which differences between test samples can't be
avoided.
True
What determines whether large-size particles are equally distributed among test
samples that have been reduced?
Laws of chance
Which method of reducing a sample must be used with fine, dry aggregate?
(C702)
Method A, mechanical splitter
What must be done to the sample if method B or C is used? (C702)
Moisten the sample
What do you do if the sample is wet and Method A is to be used? (C702)
Dry the sample
Method C, miniature stockpiling, cannot be used for which type of aggregate?
(C702)
Coarse aggregate, or mixtures of coarse and fine aggregate
Which method involves the use of chutes, holding receptacles, and hoppers or
straight-edged pans? (C702)
Method A
Sample splitters must have how many equal width chutes for coarse aggregate?
(C702)
8
Sample splitters must have how many equal width chutes for fine aggregate?
(C702)
12
In Methods B and C the sample is shoveled into a ____ before it is flattened and
divided. (c702)
conical pile
When using Method B, what is an alternate surface that can be used when
reducing the sample? (C702)
AND VERIFIED ANSWERS
(D75) Sampling should be done very carefully because it is as important as _____.
Testing
The _____ or _____ should obtain samples related to the control of production at
the source or related to the control of the work at the site.
Manufacturers, contractors
Samples to be tested for quality should, when possible, be obtained from the
_____.
Finished product
(D75) Sampling containers for aggregate samples should be made so that the
contents will not be lost, ____ or ___.
Contaminated or damaged
The reason it is difficult to obtain unbiased samples from stockpiles is because
coarse and fine particles become segregated. True or False?
True
____ can help in obtaining accurate samples from stockpiles.
Power equipment
(D75)What are the four sources from which field samples can be obtained?
Conveyer belts
Transport units
Roadways
Stockpiles
Not using correct procedures for reducing samples to testing size can result in a
_____.
Nonrepresentative sample
T or F
Generally, small samples are most representative of the total supply.
False
, T or F
There are some instances in which differences between test samples can't be
avoided.
True
What determines whether large-size particles are equally distributed among test
samples that have been reduced?
Laws of chance
Which method of reducing a sample must be used with fine, dry aggregate?
(C702)
Method A, mechanical splitter
What must be done to the sample if method B or C is used? (C702)
Moisten the sample
What do you do if the sample is wet and Method A is to be used? (C702)
Dry the sample
Method C, miniature stockpiling, cannot be used for which type of aggregate?
(C702)
Coarse aggregate, or mixtures of coarse and fine aggregate
Which method involves the use of chutes, holding receptacles, and hoppers or
straight-edged pans? (C702)
Method A
Sample splitters must have how many equal width chutes for coarse aggregate?
(C702)
8
Sample splitters must have how many equal width chutes for fine aggregate?
(C702)
12
In Methods B and C the sample is shoveled into a ____ before it is flattened and
divided. (c702)
conical pile
When using Method B, what is an alternate surface that can be used when
reducing the sample? (C702)
