ACI Certification Exam
1. T/F: This test approach covers sampling from desk bound, paving and truck mixers, and from
agitating and non-agitating device used to move valuable-combined concrete. (ASTM C172
Sampling) - ANS-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 aspect of the pattern. What ought to the technician do? -
ANS-Disregard the test and retest on some other portion of the pattern
eleven. The mould is crammed in three same layers by using volume, which makes the primary
1/3 at _______, and the second 1/3 at ________. - ANS-2 five/eight, 6 1/eight
12. The most size of mixture allowed for this check is _________. (ASTM C143 Slump) - ANS-1
1/2''
thirteen. When rodding the second one and 1/3 layers the rod must penetrate through the layer
and into the preceding layer________. - ANS-1''
14. The hunch of the concrete became determined to be four 5/16" what have to be recorded
because the stoop? - ANS-four 1/four''
15. What is the distinction allowed by way of ACI when certifying an character take a look at the
use of a plastic droop cone vs. A metal stoop cone? - ANS-0.Five inches
sixteen. T/F: The sides of the slump mold must be lightly tapped to consolidate the concrete
inside the mold. - ANS-False
17. T/F: When rodding the very last raise additional concrete should be added to hold excess
concrete above the pinnacle of the mildew always - ANS-True
18. T/F: ASTM C 1064 defines the maximum advocated temperature for concrete. - ANS-False
19. The temperature take a look at method ought to be entire with in _________ after acquiring
the pattern. - ANS-5 minutes
2. T/F: When the concrete consists of big aggregate, the checking out technician ought to
wet-sieve the sample earlier than making unit weight tests for use in yield computations. -
ANS-False
, 20. Each temperature-measuring tool have to be calibrated ________, or on every occasion
there is a question of _________. - ANS-yearly, accuracy
21. When determining the temperature of fresh concrete, what's the minimal amount of concrete
cover in all guidelines around the sensor of the TMD? - ANS-three inches
22. When the concrete incorporates a nominal most length of aggregate greater than 3 inches, it
could require __________ before the temperature is stabilized after blending. - ANS-20 minutes
23. T/F: After strike off of the measure used to determine density, a small amount of concrete
can be added to accurate a deficiency? - ANS-False
24. T/F: If the use of any strike off plate the plate have to be at the least 1 inch more than the
diameter of the degree with which it's miles getting used. - ANS-False
25. If rodding is the method of consolidation getting used, the degree should be filled in how
many layers? (Air Content, Unit Weight) - ANS-3
26. What is the specified shape on the cease of the tamping rod? - ANS-rounded to a
hemispherical tip
27. After consolidation of the final layer, the concrete is ½ inch above the top of the degree,
what ought to be finished? - ANS-get rid of excess concrete with a scoop or trowel
28. How do you locate the density of a concrete batch? - ANS-(mass of measure with concrete -
mass of measure) / quantity of measure
29. How do you locate the yield of a concrete batch? - ANS-(mass of all substances batched /
(density of concrete * 27))
three. T/F: Samples must be taken earlier than 10% or after ninety% of the batch has been
discharged. - ANS-False
30. - ANS-
31. - ANS-
32. The definition of yield can be defined as: - ANS-The ratio of actual extent of concrete
obtained to the quantity as designed
33. T/F: Test technique ASTM C231 is supposed to be used with all concretes and aggregates
for which an aggregate correction issue can be determined - ANS-False
1. T/F: This test approach covers sampling from desk bound, paving and truck mixers, and from
agitating and non-agitating device used to move valuable-combined concrete. (ASTM C172
Sampling) - ANS-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 aspect of the pattern. What ought to the technician do? -
ANS-Disregard the test and retest on some other portion of the pattern
eleven. The mould is crammed in three same layers by using volume, which makes the primary
1/3 at _______, and the second 1/3 at ________. - ANS-2 five/eight, 6 1/eight
12. The most size of mixture allowed for this check is _________. (ASTM C143 Slump) - ANS-1
1/2''
thirteen. When rodding the second one and 1/3 layers the rod must penetrate through the layer
and into the preceding layer________. - ANS-1''
14. The hunch of the concrete became determined to be four 5/16" what have to be recorded
because the stoop? - ANS-four 1/four''
15. What is the distinction allowed by way of ACI when certifying an character take a look at the
use of a plastic droop cone vs. A metal stoop cone? - ANS-0.Five inches
sixteen. T/F: The sides of the slump mold must be lightly tapped to consolidate the concrete
inside the mold. - ANS-False
17. T/F: When rodding the very last raise additional concrete should be added to hold excess
concrete above the pinnacle of the mildew always - ANS-True
18. T/F: ASTM C 1064 defines the maximum advocated temperature for concrete. - ANS-False
19. The temperature take a look at method ought to be entire with in _________ after acquiring
the pattern. - ANS-5 minutes
2. T/F: When the concrete consists of big aggregate, the checking out technician ought to
wet-sieve the sample earlier than making unit weight tests for use in yield computations. -
ANS-False
, 20. Each temperature-measuring tool have to be calibrated ________, or on every occasion
there is a question of _________. - ANS-yearly, accuracy
21. When determining the temperature of fresh concrete, what's the minimal amount of concrete
cover in all guidelines around the sensor of the TMD? - ANS-three inches
22. When the concrete incorporates a nominal most length of aggregate greater than 3 inches, it
could require __________ before the temperature is stabilized after blending. - ANS-20 minutes
23. T/F: After strike off of the measure used to determine density, a small amount of concrete
can be added to accurate a deficiency? - ANS-False
24. T/F: If the use of any strike off plate the plate have to be at the least 1 inch more than the
diameter of the degree with which it's miles getting used. - ANS-False
25. If rodding is the method of consolidation getting used, the degree should be filled in how
many layers? (Air Content, Unit Weight) - ANS-3
26. What is the specified shape on the cease of the tamping rod? - ANS-rounded to a
hemispherical tip
27. After consolidation of the final layer, the concrete is ½ inch above the top of the degree,
what ought to be finished? - ANS-get rid of excess concrete with a scoop or trowel
28. How do you locate the density of a concrete batch? - ANS-(mass of measure with concrete -
mass of measure) / quantity of measure
29. How do you locate the yield of a concrete batch? - ANS-(mass of all substances batched /
(density of concrete * 27))
three. T/F: Samples must be taken earlier than 10% or after ninety% of the batch has been
discharged. - ANS-False
30. - ANS-
31. - ANS-
32. The definition of yield can be defined as: - ANS-The ratio of actual extent of concrete
obtained to the quantity as designed
33. T/F: Test technique ASTM C231 is supposed to be used with all concretes and aggregates
for which an aggregate correction issue can be determined - ANS-False
