©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:54PM.
ACI Aggregate Level 1 Study Material Exam
Questions And Answers 2025 Update.
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) _____________________ - Answer✔control the product at the source of supply
D75
Sampling should be done very carefully because it is as important as ________. -
Answer✔testing
D75
A variety of people involved in the use of aggregate samples are responsible for obtaining the
samples. True or False? - Answer✔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. - Answer✔manufacturers, contractors
D75
The purchaser is responsible for obtaining samples for preliminary investigation tests. True or
False? - Answer✔False, should be used for accepting or rejecting decisions
D75
Samples to be tested for quality should, when possible, be obtained from the ______. -
Answer✔finished product
D75
1
,©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:54PM.
Appropriate equipment for inspection and sampling should be provided by ________.
a) the seller
b) the purchaser
c) the salesperson
d) the user - Answer✔a) the seller
D75
Use a ___________ method for selecting samples from conveyor belts. - Answer✔random
D75
The four sources from which field samples can be obtained include:
a) Flowing aggregate streams
b)_____________
c)____________ or ___________
d)______________ - Answer✔conveyor belt, stockpile or transportation unit, roadway bases
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? - Answer✔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. - Answer✔field samples
D75
The field samples are based on the _________ and _________ of tests that will be run. -
Answer✔type, number
D75
Shipping containers for aggregate samples should be made so that the contents will not be lost,
_________ or _________. - Answer✔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? - Answer✔True
2
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:54PM.
D75
_____________ can help in obtaining accurate samples from stockpiles. - Answer✔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 - Answer✔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 - Answer✔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 - Answer✔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
3
ACI Aggregate Level 1 Study Material Exam
Questions And Answers 2025 Update.
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) _____________________ - Answer✔control the product at the source of supply
D75
Sampling should be done very carefully because it is as important as ________. -
Answer✔testing
D75
A variety of people involved in the use of aggregate samples are responsible for obtaining the
samples. True or False? - Answer✔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. - Answer✔manufacturers, contractors
D75
The purchaser is responsible for obtaining samples for preliminary investigation tests. True or
False? - Answer✔False, should be used for accepting or rejecting decisions
D75
Samples to be tested for quality should, when possible, be obtained from the ______. -
Answer✔finished product
D75
1
,©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:54PM.
Appropriate equipment for inspection and sampling should be provided by ________.
a) the seller
b) the purchaser
c) the salesperson
d) the user - Answer✔a) the seller
D75
Use a ___________ method for selecting samples from conveyor belts. - Answer✔random
D75
The four sources from which field samples can be obtained include:
a) Flowing aggregate streams
b)_____________
c)____________ or ___________
d)______________ - Answer✔conveyor belt, stockpile or transportation unit, roadway bases
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? - Answer✔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. - Answer✔field samples
D75
The field samples are based on the _________ and _________ of tests that will be run. -
Answer✔type, number
D75
Shipping containers for aggregate samples should be made so that the contents will not be lost,
_________ or _________. - Answer✔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? - Answer✔True
2
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:54PM.
D75
_____________ can help in obtaining accurate samples from stockpiles. - Answer✔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 - Answer✔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 - Answer✔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 - Answer✔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
3
