ACI FLATWORK EXAM TEST BANK WITH
SOLVED QUESTIONS AND 100 PERCENT
CORRECT ANSWERS
⩥ 2. Reinforcement in flatwork helps to reduce cracking .
Answer: True
⩥ 3. Billet steel is by far the most commonly used type of reinforcing
steel in concrete .
Answer: True
⩥ 4. The grade number on reinforcing steel is a shortened notation of the
bar's tensile strength .
Answer: False
⩥ 5. The bar " number " in the inch - pound measurement system refers
to the diameter of the bar , excluding the height of the deformations , in
% of an inch increments .
Answer: True
⩥ 6. A bar fabricated with the letter " W " indicates that the steel is low -
alloy .
Answer: True
,⩥ 7. Coated reinforcement is used because the mortar to bar bond
strength is greater than it is for uncoated , " black " steel .
Answer: False
⩥ 8. The use of rock , brick , or wood to support reinforcing steel is
acceptable in lieu of other types of supports .
Answer: False
⩥ 9. Tying reinforcement is necessary because the ties carry the
structural loads to which the concrete structure will be subject .
Answer: False
⩥ 10. Mill scale or light rust on reinforcement is undesirable and any
bars exhibiting this con dition should be rejected .
Answer: False
⩥ 1. The concrete mixture component materials are required to conform
to individual AASHTO and ASTM standards in order to be used in the
concrete .
Answer: True
, ⩥ 2. On a job where the specifications indicated the maximum allowable
slump is 6 in . , the producer would be permitted to ship the mixture to
job with a slump as low as 3 1/2 in .
Answer: True
⩥ 3. M 157 indicates that the air content of air - entrained concrete when
practical , shall be sampled at the point of placement .
Answer: True
⩥ 4. When the percent of the scale capacity exceeds 30 % , the single
tolerance for cementitious materials being weighed is ± 2 % .
Answer: False
⩥ The tests for uniformity of a concrete batch are conducted on samples
obtained from the center portion of the batch .
Answer: False
⩥ A 10 yd³ ( 7.6 m³ ) central mixer on which performance testing has not
been conducted has default mixing time of 2 minutes .
Answer: False
⩥ Revolving drum truck mixers must be capable of producing a uniform
concrete at the manufacturer's recommended mixing speed within 70 to
100 revolutions of the drum .
SOLVED QUESTIONS AND 100 PERCENT
CORRECT ANSWERS
⩥ 2. Reinforcement in flatwork helps to reduce cracking .
Answer: True
⩥ 3. Billet steel is by far the most commonly used type of reinforcing
steel in concrete .
Answer: True
⩥ 4. The grade number on reinforcing steel is a shortened notation of the
bar's tensile strength .
Answer: False
⩥ 5. The bar " number " in the inch - pound measurement system refers
to the diameter of the bar , excluding the height of the deformations , in
% of an inch increments .
Answer: True
⩥ 6. A bar fabricated with the letter " W " indicates that the steel is low -
alloy .
Answer: True
,⩥ 7. Coated reinforcement is used because the mortar to bar bond
strength is greater than it is for uncoated , " black " steel .
Answer: False
⩥ 8. The use of rock , brick , or wood to support reinforcing steel is
acceptable in lieu of other types of supports .
Answer: False
⩥ 9. Tying reinforcement is necessary because the ties carry the
structural loads to which the concrete structure will be subject .
Answer: False
⩥ 10. Mill scale or light rust on reinforcement is undesirable and any
bars exhibiting this con dition should be rejected .
Answer: False
⩥ 1. The concrete mixture component materials are required to conform
to individual AASHTO and ASTM standards in order to be used in the
concrete .
Answer: True
, ⩥ 2. On a job where the specifications indicated the maximum allowable
slump is 6 in . , the producer would be permitted to ship the mixture to
job with a slump as low as 3 1/2 in .
Answer: True
⩥ 3. M 157 indicates that the air content of air - entrained concrete when
practical , shall be sampled at the point of placement .
Answer: True
⩥ 4. When the percent of the scale capacity exceeds 30 % , the single
tolerance for cementitious materials being weighed is ± 2 % .
Answer: False
⩥ The tests for uniformity of a concrete batch are conducted on samples
obtained from the center portion of the batch .
Answer: False
⩥ A 10 yd³ ( 7.6 m³ ) central mixer on which performance testing has not
been conducted has default mixing time of 2 minutes .
Answer: False
⩥ Revolving drum truck mixers must be capable of producing a uniform
concrete at the manufacturer's recommended mixing speed within 70 to
100 revolutions of the drum .
