ACI Aggregate Testing Technician - Level 2 Questions With Complete Solutions

ACI Aggregate Testing Technician - Level 2 Questions With
Complete Solutions

AASHTO T 104 Soundness of Aggregate

1. The purpose of this test is to estimate the __________ of
aggregates when exposed to _________ actions. Correct
Answers Soundness; weathering

AASHTO T 104 Soundness of Aggregate

10. Test and report very fine and very coarse samples
___________ from the rest when they both exist in the
aggregate to be tested. Correct Answers Separately

AASHTO T 104 Soundness of Aggregate

11. Use the nest of sieves specified in 5.1 and 5.2 to separate the
____________ samples. Correct Answers Graded

AASHTO T 104 Soundness of Aggregate

12. Samples must be immersed in the solution, covered to a
depth of at least __________ for not less than _________ nor
more than __________. Correct Answers 12.5 mm (1/2 in.); 16
hours; 18 hours

AASHTO T 104 Soundness of Aggregate

13. Which of the following steps are included (as stated here) in
the test procedure:

,(a) samples are immersed in the solution;
(b) samples are drained for 15 ± 5 min.;
(c) samples are dried in an oven at 230 ± 9 °F;
(d) samples are cooled to room temperature. Correct Answers
a, b, c, d

AASHTO T 104 Soundness of Aggregate

14. Constant weight is when the weight loss is less than 0.1% of
the sample weight after 4 hours of drying. True or False?
Correct Answers True

AASHTO T 104 Soundness of Aggregate

15. The sample is determined to be free of sodium or
magnesium sulfate when the wash water attains the same degree
of cloudiness as tap water when treated with ______________
Correct Answers Barium Chloride

AASHTO T 104 Soundness of Aggregate

16. Following the various steps in the procedure, two
examinations should be conducted: the ___________ exam and
the ___________ exam. Correct Answers Quantitative;
qualitative

AASHTO T 104 Soundness of Aggregate

17. In the first exam for coarse aggregates, _____________
should be by hand. Correct Answers Sieving

,AASHTO T 104 Soundness of Aggregate

18. Examples of various types of action produced by the test
include: ____________, _____________, ____________,
___________, ___________. Correct Answers Disintegration,
splitting, crumbling, cracking, flaking

AASHTO T 104 Soundness of Aggregate

19. No suggested form for recording test data is included. True
or False? Correct Answers False; Table 1 is a suggested form

AASHTO T 104 Soundness of Aggregate

2. The test can be used when data isn't available from exposure
to actual conditions. True or False? Correct Answers True

AASHTO T 104 Soundness of Aggregate

20. Match the following descriptions and figures:

1. 20.3 to 21.9 °C (68.5 to 71.5 °F)
2. 9.5 mm
3. 4.75 mm
4. 110 ± 5 °C (230 ± 9 °F)
5. 43 ± 6 °C (110 ± 10 °F)
6. 19.0 mm (3/4 in.)

a. temperature needed to dry samples to constant weight
b. temperature of the solution in which samples are immersed

, c. temperature of water which washes off sulfate solutions
before quantitative examination
d. size of No. 4 sieve testing coarse aggregate
e. size of 3/8 in. sieve testing fine aggregate
f. samples coarser than this size are subject to a qualitative
examination. Correct Answers 1) 20.3 to 21.9 °C (68.5 to 71.5
°F)
b. temperature of the solution in which samples are immersed

2) 9.5 mm
e. size of 3/8 in. sieve testing fine aggregate

3) 4.75 mm
d. size of No. 4 sieve testing coarse aggregate

4) 110 ± 5 °C (230 ± 9 °F)
a. temperature needed to dry samples to constant weight

5) 43 ± 6 °C (110 ± 10 °F)
c. temperature of water which washes off sulfate solutions
before quantitative examination

6) 19.0 mm (3/4 in.)
f. samples coarser than this size are subject to a qualitative
examination.

AASHTO T 104 Soundness of Aggregate

3. The process involved simulates the expansion of ________
when it _________. Correct Answers Water; freezes