ACI CONCRETE STRENGTH TESTING
TECHNICIAN SAMPLE WRITTEN EXAM
COMPLETE STUDY GUIDE WITH SOLVED
QUESTIONS AND FULL SOLUTIONS
⩥ How much time is allowed for lifting the slump mold?.
Answer: 5 seconds, +/- 2 seconds
⩥ The measurement for slump is made from the top of the mold to what
point of the concrete specimen?.
Answer: middle of the top
⩥ The slump of the concrete is measured and reported to the nearest.
Answer: 0.25"
⩥ How much time is allowed to conduct the slump test from beginning
to completion?.
Answer: 2.5 min
⩥ The diameter of the tamping rod used in the unit weight test method
is.
Answer: 5/8"
,⩥ What is the required shape of the tamping rod for the unit weight
test?.
Answer: rounded tip
⩥ What is the required minimum frequency of the vibrator used in the
unit weight test?.
Answer: 9000 vpm
⩥ For the unit weight test, the outside diameter of the vibrating element
must be at least __ but not greater than __..
Answer: 0.75 to 1.25"
⩥ A plastic container can be used for the measure in this method. True or
False?.
Answer: False
⩥ What is the minimum thickness of a metal strike-off plastic?.
Answer: 0.25"
⩥ For the unit weight test, what is the minimum thickness for a glass or
acrylic strike-off plate.
Answer: 0.5"
, ⩥ What is the specified weight of the malled used for the unit weight
test on measures that are 14L or smaller?.
Answer: 1.25 lbs +/- 0.5lb
⩥ Measures other than air meter bowls used for the unit weight test must
conform to test method.
Answer: C231, C29
⩥ The concrete sample must be obtained in accordance with ASTM.
Answer: C172
⩥ For the unit weight test, what method of consolidation must be used
when the slump is greater than 3".
Answer: rodding
⩥ What method of consolidation must be used when the slump is less
than 1".
Answer: vibratory
⩥ If rodding is the method of consolidation being used for the unit
weight test, the measure must be filled in how many layers?.
Answer: three
TECHNICIAN SAMPLE WRITTEN EXAM
COMPLETE STUDY GUIDE WITH SOLVED
QUESTIONS AND FULL SOLUTIONS
⩥ How much time is allowed for lifting the slump mold?.
Answer: 5 seconds, +/- 2 seconds
⩥ The measurement for slump is made from the top of the mold to what
point of the concrete specimen?.
Answer: middle of the top
⩥ The slump of the concrete is measured and reported to the nearest.
Answer: 0.25"
⩥ How much time is allowed to conduct the slump test from beginning
to completion?.
Answer: 2.5 min
⩥ The diameter of the tamping rod used in the unit weight test method
is.
Answer: 5/8"
,⩥ What is the required shape of the tamping rod for the unit weight
test?.
Answer: rounded tip
⩥ What is the required minimum frequency of the vibrator used in the
unit weight test?.
Answer: 9000 vpm
⩥ For the unit weight test, the outside diameter of the vibrating element
must be at least __ but not greater than __..
Answer: 0.75 to 1.25"
⩥ A plastic container can be used for the measure in this method. True or
False?.
Answer: False
⩥ What is the minimum thickness of a metal strike-off plastic?.
Answer: 0.25"
⩥ For the unit weight test, what is the minimum thickness for a glass or
acrylic strike-off plate.
Answer: 0.5"
, ⩥ What is the specified weight of the malled used for the unit weight
test on measures that are 14L or smaller?.
Answer: 1.25 lbs +/- 0.5lb
⩥ Measures other than air meter bowls used for the unit weight test must
conform to test method.
Answer: C231, C29
⩥ The concrete sample must be obtained in accordance with ASTM.
Answer: C172
⩥ For the unit weight test, what method of consolidation must be used
when the slump is greater than 3".
Answer: rodding
⩥ What method of consolidation must be used when the slump is less
than 1".
Answer: vibratory
⩥ If rodding is the method of consolidation being used for the unit
weight test, the measure must be filled in how many layers?.
Answer: three
