ACI- CONCRETE FIELD-TESTING
TECHNICIAN - GRADE 1 FINAL EXAM
AND PRACTICE EXAM QUESTIONS 2025
NEWEST ACTUAL EXAM COMPLETE
EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS /ALREADY GRADED
A+
. For a design batch of 9.0 cubic yards, the total weight
of all materials batched was 36,400 lb., and the actual
yield was 9.5 cubic yards. What was the relative yield?
A. 1.06
B. 0.95
C. 4044 ft³
D. 3832 lbs - ....ANSWER...A. 1.06
ASTM C138- (Para 7.4)
Relative yield is the ratio of the actual
,volume of concrete obtained to the volume as designed
for the batch.
Relative Yield (RY)
Ry= Yield ⁄ Design Yield= 9.5/9=1.05
Report the answer to 0.1 yd³
.Determine the air content. If the given information as
followings
Total material batched 37,500 lbs
Design yield 9.0 yd³
Theoretical unit wt. 150.0 lbs/ft³
Actual unit wt. 140.0 lbs/ft³
Actual yield 9.6 yd³
A. 7.1%
B. 6.7%
C. 8.7%
D. Not enough information - ....ANSWER...B. 6.7%
ASTM C138- (Para 7.6)
,Air Content = (Theoretical Unit-Actual unit
/Theoretical) x100=
Air Content = (150-140/150) x100= 6.6%
Report the answer to 0.1 %
. Calculate the density. Given the following: wt. of
bucket 16.2 lbs, volume of bucket =0.498 cf, and wt of
bucket and concrete 88.5 lbs.
A. 140.7 lb/ft³
B. 145.2 lb/ft³
C. 177.7 lb/ft³
D. None of the above - ....ANSWER...B. 145.2 lb/ft³
ASTM C138- (Para 7.1)
D= (mass of the measure filled with concrete - the mass
of the
measure)/V
D= (88.5-16.2 )/0.498 =145.18 lb/ft³
, Report the answer to 0.1 I b/ft³.
. The pressure method of determining air content can be
sed on concrete containing _________ aggregate. -
....ANSWER...relatively dense aggregates
ASTM C231- (Para 2.1)
This test method is intended for use with concretes and
mortars made with relatively dense aggregates.
.The pressure method of determining air content cannot
be used on concrete containing the following types of
aggregate _________, _______and _________. -
....ANSWER...lightweight aggregates, air-cooled blast
furnace slag and
aggregates of high porosity.
ASTM C231- (Para 2.1)
TECHNICIAN - GRADE 1 FINAL EXAM
AND PRACTICE EXAM QUESTIONS 2025
NEWEST ACTUAL EXAM COMPLETE
EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS /ALREADY GRADED
A+
. For a design batch of 9.0 cubic yards, the total weight
of all materials batched was 36,400 lb., and the actual
yield was 9.5 cubic yards. What was the relative yield?
A. 1.06
B. 0.95
C. 4044 ft³
D. 3832 lbs - ....ANSWER...A. 1.06
ASTM C138- (Para 7.4)
Relative yield is the ratio of the actual
,volume of concrete obtained to the volume as designed
for the batch.
Relative Yield (RY)
Ry= Yield ⁄ Design Yield= 9.5/9=1.05
Report the answer to 0.1 yd³
.Determine the air content. If the given information as
followings
Total material batched 37,500 lbs
Design yield 9.0 yd³
Theoretical unit wt. 150.0 lbs/ft³
Actual unit wt. 140.0 lbs/ft³
Actual yield 9.6 yd³
A. 7.1%
B. 6.7%
C. 8.7%
D. Not enough information - ....ANSWER...B. 6.7%
ASTM C138- (Para 7.6)
,Air Content = (Theoretical Unit-Actual unit
/Theoretical) x100=
Air Content = (150-140/150) x100= 6.6%
Report the answer to 0.1 %
. Calculate the density. Given the following: wt. of
bucket 16.2 lbs, volume of bucket =0.498 cf, and wt of
bucket and concrete 88.5 lbs.
A. 140.7 lb/ft³
B. 145.2 lb/ft³
C. 177.7 lb/ft³
D. None of the above - ....ANSWER...B. 145.2 lb/ft³
ASTM C138- (Para 7.1)
D= (mass of the measure filled with concrete - the mass
of the
measure)/V
D= (88.5-16.2 )/0.498 =145.18 lb/ft³
, Report the answer to 0.1 I b/ft³.
. The pressure method of determining air content can be
sed on concrete containing _________ aggregate. -
....ANSWER...relatively dense aggregates
ASTM C231- (Para 2.1)
This test method is intended for use with concretes and
mortars made with relatively dense aggregates.
.The pressure method of determining air content cannot
be used on concrete containing the following types of
aggregate _________, _______and _________. -
....ANSWER...lightweight aggregates, air-cooled blast
furnace slag and
aggregates of high porosity.
ASTM C231- (Para 2.1)
