ACI Certification Exam Questions With Complete Solutions
1. T/F: This test method covers sampling from stationary,
paving and truck mixers, and from agitating and non-agitating
equipment used to transport central-mixed concrete. (ASTM
C172 Sampling) Correct Answers True
10. While the technician is checking the slump of the concrete,
there is a decided falling away or shearing off of the concrete
from one side of the sample. What should the technician do?
Correct Answers Disregard the test and retest on another
portion of the sample
11. The mold is filled in three equal layers by volume, which
makes the first third at _______, and the second third at
________. Correct Answers 2 5/8, 6 1/8
12. The maximum size of aggregate allowed for this test is
_________. (ASTM C143 Slump) Correct Answers 1 1/2''
13. When rodding the second and third layers the rod should
penetrate through the layer and into the previous layer________.
Correct Answers 1''
14. The slump of the concrete was determined to be 4 5/16"
what should be recorded as the slump? Correct Answers 4 1/4''
15. What is the difference allowed by ACI when certifying an
individual test using a plastic slump cone vs. a metal slump
cone? Correct Answers 0.5 inches
, 16. T/F: The sides of the slump mold should be lightly tapped to
consolidate the concrete in the mold. Correct Answers False
17. T/F: When rodding the final lift additional concrete must be
added to keep excess concrete above the top of the mold at all
times Correct Answers True
18. T/F: ASTM C 1064 defines the maximum recommended
temperature for concrete. Correct Answers False
19. The temperature test method must be complete with in
_________ after obtaining the sample. Correct Answers 5
minutes
2. T/F: When the concrete contains large aggregate, the testing
technician should wet-sieve the sample before making unit
weight tests for use in yield computations. Correct Answers
False
20. Each temperature-measuring device should be calibrated
________, or whenever there is a question of _________.
Correct Answers annually, accuracy
21. When determining the temperature of fresh concrete, what is
the minimum amount of concrete cover in all directions around
the sensor of the TMD? Correct Answers 3 inches
22. When the concrete contains a nominal maximum size of
aggregate greater than 3 inches, it may require __________
before the temperature is stabilized after mixing. Correct
Answers 20 minutes
1. T/F: This test method covers sampling from stationary,
paving and truck mixers, and from agitating and non-agitating
equipment used to transport central-mixed concrete. (ASTM
C172 Sampling) Correct Answers True
10. While the technician is checking the slump of the concrete,
there is a decided falling away or shearing off of the concrete
from one side of the sample. What should the technician do?
Correct Answers Disregard the test and retest on another
portion of the sample
11. The mold is filled in three equal layers by volume, which
makes the first third at _______, and the second third at
________. Correct Answers 2 5/8, 6 1/8
12. The maximum size of aggregate allowed for this test is
_________. (ASTM C143 Slump) Correct Answers 1 1/2''
13. When rodding the second and third layers the rod should
penetrate through the layer and into the previous layer________.
Correct Answers 1''
14. The slump of the concrete was determined to be 4 5/16"
what should be recorded as the slump? Correct Answers 4 1/4''
15. What is the difference allowed by ACI when certifying an
individual test using a plastic slump cone vs. a metal slump
cone? Correct Answers 0.5 inches
, 16. T/F: The sides of the slump mold should be lightly tapped to
consolidate the concrete in the mold. Correct Answers False
17. T/F: When rodding the final lift additional concrete must be
added to keep excess concrete above the top of the mold at all
times Correct Answers True
18. T/F: ASTM C 1064 defines the maximum recommended
temperature for concrete. Correct Answers False
19. The temperature test method must be complete with in
_________ after obtaining the sample. Correct Answers 5
minutes
2. T/F: When the concrete contains large aggregate, the testing
technician should wet-sieve the sample before making unit
weight tests for use in yield computations. Correct Answers
False
20. Each temperature-measuring device should be calibrated
________, or whenever there is a question of _________.
Correct Answers annually, accuracy
21. When determining the temperature of fresh concrete, what is
the minimum amount of concrete cover in all directions around
the sensor of the TMD? Correct Answers 3 inches
22. When the concrete contains a nominal maximum size of
aggregate greater than 3 inches, it may require __________
before the temperature is stabilized after mixing. Correct
Answers 20 minutes
