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ACI Aggregate Testing Technician Level 1 - Sample Written Exam 2024
Questions & Answers
...
Which of the following statements is false? Aggregates are sampled:
A
...
For the control of operations at the site of use
C
...
For the control of the product at the source of supply
E
...
Windshield solvent
B
...
Ammonia
D
...
Balance
B
...
Tarp
D
...
Aand C - ANSD
After the 3% NaOH solution is added to the sample of fine aggregate in the bottle:
A
...
The bottle should be shaken and then allowed to stand for 3 hours before color
comparison is made
C
...
Stopper the bottle, shake vigorously, and then allow to stand for 24 hours - ANSD
An ordinary frying pan should never be used with a hot plate because of heat transfer
problems
...
True
B
...
The seller
B
...
The salesperson

D
...
The testing company - ANSA
Drying with paper towels, use of colorimetric procedures and alternate tamping methods
can be used on materials that do not readily:
A
...
Dry
C
...
A and B - ANSC
Generally speaking, small samples are most representative of the total supply
...
True
B
...

A
...
75 mm (No
...
2
...
8)
C
...
35 mm (No
...
2
...
10) - ANSA
More than ____ minutes is considered excessive time spent in the mechanical sieve
shaker and
may result in degradation of the sample
...
5
B
...
15
D
...

A
...
15 hr
C
...
7 days - ANSB
The mass of fine aggregate needed for the test sample is about:
A
...
2250 g (5 lb)
C
...
4500 g (10 lb) - ANSA
The method known as quartering:
A
...
Cannot be performed without a canvas blanket
C
...
Can be repeated until the sample is of the desired size - ANSD

The results must be reported to the nearest whole number if the fine material is what
percent or greater of the total material used?
A
...
10%
C
...
0
...
15% - ANSB
When sieving by hand, it is acceptable to rotate particles to see if they will go through
sieve openings,
but not to force them through
...
True
B
...
It should always be metallic
B
...
It should be unaffected by heat
D
...
B and C - ANSE



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