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ACI - Aggregate Base Testing Technician 2024/2025 graded A+
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ACI - Aggregate Base Testing Technician 2024/2025 graded A+
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ACI - Aggregate Base TestingTechnician
Testing - ANSSampling should be done very carefully because it is as important as
____________.
Conveyer belts
Transport units
Roadways
Stockpiles - ANSWhat are the four sources from which field samples can be obtained?
contaminated, damaged - ANSSampling containers for aggregate samples should be made
so that the contents will not be lost, _____ or _____.
Nonrepresentative sample - ANSNot using correct procedures for reducing samples to
testing size can result in a _____.
False - ANST or F
Generally, small samples are most representative of the total supply.
True - ANST or F
There are some instances in which differences between test samples can't be avoided.
Laws of chance - ANSWhat determines whether large-size particles are equally distributed
among test samples that have been reduced?
Method A, mechanical splitter - ANSWhich method of reducing a sample must be used with
fine, dry aggregate?
Moisten the sample - ANSWhat must be done to the sample if method B or C is used?
Dry the sample - ANSWhat do you do if the sample is wet and Method A is to be used?
Coarse aggregate, or mixtures of coarse and fine aggregate - ANSMethod C, miniature
stockpiling, cannot be used for which type of aggregate?
Method A - ANSWhich method involves the use of chutes, holding receptacles, and hoppers
or straight-edged pans?
8 - ANSSample splitters must have how many equal width chutes for coarse aggregate?
12 - ANSSample splitters must have how many equal width chutes for fine aggregate?
, conical pile - ANSIn Methods B and C the sample is shoveled into a ____ before it is
flattened and divided.
Canvas blanket or tear resistant tarp - ANSWhen using Method B, what is an alternate
surface that can be used when reducing the sample?
diagonally opposite - ANSWhen quartering a sample, retain two _________ quarters and
reject the other two.
5, random - ANSIn miniature stockpile sampling, obtain the sample by selecting at least
____ increments of material from ____ locations in the stockpile.
60*C/140*F - ANSThe drying apparatus used for dry preparation of a sample is any suitable
device capable of drying samples at a temperature not exceeding _____.
representative, fines - ANSA suitable sample splitter is one capable of obtaining ____
portions of the sample without appreciable loss of ____.
110, 60 - ANSFor particle size analysis, material passing a 2.00mm (No. 10) sieve is
required in amounts equal to approximately ___ g for sandy soils and approximately ___g for
silty or clayey soils.
25, 10 - ANSFor specific gravity, material passing a 2.00mm (10) sieve is requires in
amounts of at least ____g when the volumetric flask is used and at least ____g when the
stoppered bottle is used.
2.00mm (No. 10), Two - ANSFor the physical test, the remaining portion of the material
passing the _____ sieve shall be separated into ____ parts by means of a 0.425mm (40)
sieve.
Pulverizing operation - ANSFor the physical test, if the sample contains brittle particles such
as flakes of mica, fragments of seashells, etc, the ____________ shall be done carefully to
free the finer material that adheres to the coarse particles.
The liquid limit of a soil - ANSWhat is defined as he water content at which the soil passes
from a plastic to a liquid?
corrosion, mass, disintegration - ANS(LL) suitable containers should be made of material
resistant to ____ and not subject to change in ____ or ___ on repeated heating and cooling.
100g - ANS(LL) A sample with a mass of about ___ shall be taken from the thoroughly
mixed portion of the material.
13, one half - ANSWear on the liquid limit device is considered excessive whe the point of
contact on the cup or base exceeds approximately ____mm in diameter, or when any point
on the rim of the cup is worn approximately ____ the original thickness.
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