ACI AGGREGATE LEVEL 1 QUESTIONS AND
ANSWERS
D75
The following are three of the four purposes for which aggregates are sampled; supply
the fourth.
a) for the acceptance or rejection of materials.
b) for the control of operations at the site of use.
c) for preliminary investigation of the potential source of supply.
d) _____________________ - Answers :control the product at the source of supply
D75
Sampling should be done very carefully because it is as important as ________. -
Answers :testing
D75
A variety of people involved in the use of aggregate samples are responsible for
obtaining the samples. True or False? - Answers :False, should be performed by trained
personnel
D75
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. - Answers :manufacturers,
contractors
D75
Sampling from stockpiles should follow the standard method for all sampling so that
there will be confidence in the results obtained.
True or False? - Answers :False, a sampling plan needs to be designed
D75
The number of _________ required by any of the methods depends on the criticality of
and variation in the properties to be measured. - Answers :field samples
D75
The field samples are based on the _________ and _________ of tests that will be run.
- Answers :type, number
D75
Shipping containers for aggregate samples should be made so that the contents will not
be lost, _________ or _________. - Answers :contaminated, damaged
D75
,The reason it is difficult to obtain unbiased samples from stockpiles is because coarse
and fine particles become segregated.
True or False? - Answers :True
D75
_____________ can help in obtaining accurate samples from stockpiles. - Answers
:Power equipment
C702
The sample splitters shall have an even number of equal width chutes, but not less than
a total of _______ for coarse aggregrate, or ________ for fine aggregrate.
a) 8, 12
b) 10, 12
c) 4, 6
d) 4, 8 - Answers :a) 8, 12
C702
For coarse aggregrate and mixed aggregrate, the minimum width of the individual
chutes shall be approximately ______ % larger than the largest particles in the sample
to be split.
a) 10
b) 25
c) 50
d) 75 - Answers :c) 50
C702
For dry fine aggregrate in which the entire sample will pass the 3/8" sieve, a splitter
having chutes ____ in. to ______ in. shall be used.
a) 1/2, 3/4
b) 1/4, 3/4
c) 1/2, 1
d) 1/4, 1/2 - Answers :a) 1/2, 3/4
C702
When using the quartering method, mix the material thoroughly by turning the entire
sample over ______ times.
a) 8
b) 4
c) 3
d) 2 - Answers :c) 3
C702
When quartering the material, the diameter should be approximately ______ to ______
times the thickness of the sample pile.
a) 2, 4
b) 4, 8
, c) 5, 10
d) 3, 4 - Answers :b) 4, 8
C702
After dividing the flattened mass into four equal quarters, remove ____________
quarter(s).
a) 3 adjoining
b) 2 adjoining
c) Diagonally oppposite
d) 1 - Answers :c) diagonally opposite
D75
The purchaser is responsible for obtaining samples for preliminary investigation tests.
True or False? - Answers :False, should be used for accepting or rejecting decisions
D75
Samples to be tested for quality should, when possible, be obtained from the ______. -
Answers :finished product
D75
Appropriate equipment for inspection and sampling should be provided by ________.
a) the seller
b) the purchaser
c) the salesperson
d) the user - Answers :a) the seller
D75
Use a ___________ method for selecting samples from conveyor belts. - Answers
:random
D75
The four sources from which field samples can be obtained include:
a) Flowing aggregate streams
b)_____________
c)____________ or ___________
d)______________ - Answers :conveyor belt, stockpile or transportation unit, roadway
bases
C702
Obtain a sample for each test by selecting at least _____ increments of material at
random locations from the miniature stockpiles using any of the sampling devices.
a) 2
b) 3
c) 4
d) 5 - Answers :d) 5
ANSWERS
D75
The following are three of the four purposes for which aggregates are sampled; supply
the fourth.
a) for the acceptance or rejection of materials.
b) for the control of operations at the site of use.
c) for preliminary investigation of the potential source of supply.
d) _____________________ - Answers :control the product at the source of supply
D75
Sampling should be done very carefully because it is as important as ________. -
Answers :testing
D75
A variety of people involved in the use of aggregate samples are responsible for
obtaining the samples. True or False? - Answers :False, should be performed by trained
personnel
D75
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. - Answers :manufacturers,
contractors
D75
Sampling from stockpiles should follow the standard method for all sampling so that
there will be confidence in the results obtained.
True or False? - Answers :False, a sampling plan needs to be designed
D75
The number of _________ required by any of the methods depends on the criticality of
and variation in the properties to be measured. - Answers :field samples
D75
The field samples are based on the _________ and _________ of tests that will be run.
- Answers :type, number
D75
Shipping containers for aggregate samples should be made so that the contents will not
be lost, _________ or _________. - Answers :contaminated, damaged
D75
,The reason it is difficult to obtain unbiased samples from stockpiles is because coarse
and fine particles become segregated.
True or False? - Answers :True
D75
_____________ can help in obtaining accurate samples from stockpiles. - Answers
:Power equipment
C702
The sample splitters shall have an even number of equal width chutes, but not less than
a total of _______ for coarse aggregrate, or ________ for fine aggregrate.
a) 8, 12
b) 10, 12
c) 4, 6
d) 4, 8 - Answers :a) 8, 12
C702
For coarse aggregrate and mixed aggregrate, the minimum width of the individual
chutes shall be approximately ______ % larger than the largest particles in the sample
to be split.
a) 10
b) 25
c) 50
d) 75 - Answers :c) 50
C702
For dry fine aggregrate in which the entire sample will pass the 3/8" sieve, a splitter
having chutes ____ in. to ______ in. shall be used.
a) 1/2, 3/4
b) 1/4, 3/4
c) 1/2, 1
d) 1/4, 1/2 - Answers :a) 1/2, 3/4
C702
When using the quartering method, mix the material thoroughly by turning the entire
sample over ______ times.
a) 8
b) 4
c) 3
d) 2 - Answers :c) 3
C702
When quartering the material, the diameter should be approximately ______ to ______
times the thickness of the sample pile.
a) 2, 4
b) 4, 8
, c) 5, 10
d) 3, 4 - Answers :b) 4, 8
C702
After dividing the flattened mass into four equal quarters, remove ____________
quarter(s).
a) 3 adjoining
b) 2 adjoining
c) Diagonally oppposite
d) 1 - Answers :c) diagonally opposite
D75
The purchaser is responsible for obtaining samples for preliminary investigation tests.
True or False? - Answers :False, should be used for accepting or rejecting decisions
D75
Samples to be tested for quality should, when possible, be obtained from the ______. -
Answers :finished product
D75
Appropriate equipment for inspection and sampling should be provided by ________.
a) the seller
b) the purchaser
c) the salesperson
d) the user - Answers :a) the seller
D75
Use a ___________ method for selecting samples from conveyor belts. - Answers
:random
D75
The four sources from which field samples can be obtained include:
a) Flowing aggregate streams
b)_____________
c)____________ or ___________
d)______________ - Answers :conveyor belt, stockpile or transportation unit, roadway
bases
C702
Obtain a sample for each test by selecting at least _____ increments of material at
random locations from the miniature stockpiles using any of the sampling devices.
a) 2
b) 3
c) 4
d) 5 - Answers :d) 5
