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ACI Aggregate Testing Technician - Level 1 -
Section 5 Exam Questions And Answers 2025
Update.
The method is appropriate for coarse but not ____ aggregate. - Answer✔Lightweight
SSD refers to _____ - _____ - _____ condition. - Answer✔saturated-surface-dry
To calculate the volume of aggregate in a mixture (including the voids between the particles) is
to determine the ______. - Answer✔Bulk specific gravity
When the mass of the water within the voids after 24-hour absorption is included in the volume
of aggregate, you are calculating the ______. - Answer✔Relative specific gravity (SSD)
Computing the impermeable portion of the aggregate is finding the _____. - Answer✔Apparent
specific gravity
The laboratory standard for absorption is the level obtained after ____ of soaking. - Answer✔15
hr
Absorption values pertain to the ____ in the mass of the aggregate due to ____ absorbed in the
pores. - Answer✔Change, water
Forms of conditioning (besides the 15-hr soak) for which this test may be used include ______
and _____. - Answer✔Boiling water, vacuum saturation
Aggregate is considered "dry" when it has been at 230 ± 9°F long enough for all uncombined
water to be removed by reaching a constant mass. True or False? - Answer✔True
In sampling, all aggregate not passing a 2.36 mm sieve by dry sieving should be retained. True
or False? - Answer✔False; all not passing a 4.75 mm sieve
When material is tested in separate size fractions, the minimum mass of the sample in each
fraction should be the ______ between the prescribed maximum and minimum sizes of the
fraction. - Answer✔Difference
1
ACI Aggregate Testing Technician - Level 1 -
Section 5 Exam Questions And Answers 2025
Update.
The method is appropriate for coarse but not ____ aggregate. - Answer✔Lightweight
SSD refers to _____ - _____ - _____ condition. - Answer✔saturated-surface-dry
To calculate the volume of aggregate in a mixture (including the voids between the particles) is
to determine the ______. - Answer✔Bulk specific gravity
When the mass of the water within the voids after 24-hour absorption is included in the volume
of aggregate, you are calculating the ______. - Answer✔Relative specific gravity (SSD)
Computing the impermeable portion of the aggregate is finding the _____. - Answer✔Apparent
specific gravity
The laboratory standard for absorption is the level obtained after ____ of soaking. - Answer✔15
hr
Absorption values pertain to the ____ in the mass of the aggregate due to ____ absorbed in the
pores. - Answer✔Change, water
Forms of conditioning (besides the 15-hr soak) for which this test may be used include ______
and _____. - Answer✔Boiling water, vacuum saturation
Aggregate is considered "dry" when it has been at 230 ± 9°F long enough for all uncombined
water to be removed by reaching a constant mass. True or False? - Answer✔True
In sampling, all aggregate not passing a 2.36 mm sieve by dry sieving should be retained. True
or False? - Answer✔False; all not passing a 4.75 mm sieve
When material is tested in separate size fractions, the minimum mass of the sample in each
fraction should be the ______ between the prescribed maximum and minimum sizes of the
fraction. - Answer✔Difference
1
