ACI Aggregate Level 1 Study Material
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) _____________________ - (correct answer) -control the
product at the source of supply
D75
Sampling should be done very carefully because it is as
important as ________. - (correct answer) -testing
D75
A variety of people involved in the use of aggregate
samples are responsible for obtaining the samples. True
or False? - (correct 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. - (correct answer) -
manufacturers, contractors
,D75
The purchaser is responsible for obtaining samples for
preliminary investigation tests. True or False? - (correct
answer) -False, should be used for accepting or rejecting
decisions
D75
Samples to be tested for quality should, when possible, be
obtained from the ______. - (correct answer) -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 - (correct answer) -a) the seller
D75
Use a ___________ method for selecting samples from
conveyor belts. - (correct answer) -random
D75
The four sources from which field samples can be obtained
include:
a) Flowing aggregate streams
b)_____________
c)____________ or ___________
,d)______________ - (correct 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? - (correct 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. - (correct answer) -field
samples
D75
The field samples are based on the _________ and _________ of
tests that will be run. - (correct answer) -type, number
D75
Shipping containers for aggregate samples should be
made so that the contents will not be lost, _________ or
_________. - (correct 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? - (correct answer) -True
D75
, _____________ can help in obtaining accurate samples from
stockpiles. - (correct 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 - (correct 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 - (correct 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
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) _____________________ - (correct answer) -control the
product at the source of supply
D75
Sampling should be done very carefully because it is as
important as ________. - (correct answer) -testing
D75
A variety of people involved in the use of aggregate
samples are responsible for obtaining the samples. True
or False? - (correct 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. - (correct answer) -
manufacturers, contractors
,D75
The purchaser is responsible for obtaining samples for
preliminary investigation tests. True or False? - (correct
answer) -False, should be used for accepting or rejecting
decisions
D75
Samples to be tested for quality should, when possible, be
obtained from the ______. - (correct answer) -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 - (correct answer) -a) the seller
D75
Use a ___________ method for selecting samples from
conveyor belts. - (correct answer) -random
D75
The four sources from which field samples can be obtained
include:
a) Flowing aggregate streams
b)_____________
c)____________ or ___________
,d)______________ - (correct 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? - (correct 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. - (correct answer) -field
samples
D75
The field samples are based on the _________ and _________ of
tests that will be run. - (correct answer) -type, number
D75
Shipping containers for aggregate samples should be
made so that the contents will not be lost, _________ or
_________. - (correct 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? - (correct answer) -True
D75
, _____________ can help in obtaining accurate samples from
stockpiles. - (correct 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 - (correct 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 - (correct 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
