ACI CONCRETE FIELD TESTING
TECHNICIAN COMPREHENSIVE
EXAMINATION 2026 FULL SOLUTIONS AND
CORRECT ANSWERS
◉When raising the slump mold, it should not be rotated or twisted,
True or False? Answer: True
◉How much time is allowed for lifting the slump mold? Answer: 5
+- 2 seconds
◉The measurement for slump is made from the top of the mold to
what point of the concrete specimen? Answer: The displaced
original center of the top surface of the specimen
◉The slump of the concrete is measured and reported to the nearest
_____. Answer: 1/4 in. [5 mm]
◉How much time is allowed to conduct the slump test from
beginning to completion? Answer: 2 1/2 minutes
, ◉The diameter of the tamping rod used in the test method is _____.
Answer: 5/8 in. [16 mm]
◉What is the required shape of the tamping end of the rod?
Answer: Rounded to a hemispherical tip
◉What is the required minimum frequency of the vibrator used in
this test method? Answer: 7000 vibrations per minute
◉The outside diameter or side dimension of the vibrating element
must be at least _____ but not greater than _____. Answer: 0.75 in. [19
mm], 1.50 in. [38 mm]
◉A plastic container can be used for the measure in this method.
True or False? Answer: False, measure must be steel or another
suitable metal
◉What is the minimum thickness of a metal strike-off plate?
Answer: 1/4 in. [6 mm]
◉What is the minimum thickness for a glass or acrylic strike-off
plate? Answer: 1/2 in. [12 mm]
TECHNICIAN COMPREHENSIVE
EXAMINATION 2026 FULL SOLUTIONS AND
CORRECT ANSWERS
◉When raising the slump mold, it should not be rotated or twisted,
True or False? Answer: True
◉How much time is allowed for lifting the slump mold? Answer: 5
+- 2 seconds
◉The measurement for slump is made from the top of the mold to
what point of the concrete specimen? Answer: The displaced
original center of the top surface of the specimen
◉The slump of the concrete is measured and reported to the nearest
_____. Answer: 1/4 in. [5 mm]
◉How much time is allowed to conduct the slump test from
beginning to completion? Answer: 2 1/2 minutes
, ◉The diameter of the tamping rod used in the test method is _____.
Answer: 5/8 in. [16 mm]
◉What is the required shape of the tamping end of the rod?
Answer: Rounded to a hemispherical tip
◉What is the required minimum frequency of the vibrator used in
this test method? Answer: 7000 vibrations per minute
◉The outside diameter or side dimension of the vibrating element
must be at least _____ but not greater than _____. Answer: 0.75 in. [19
mm], 1.50 in. [38 mm]
◉A plastic container can be used for the measure in this method.
True or False? Answer: False, measure must be steel or another
suitable metal
◉What is the minimum thickness of a metal strike-off plate?
Answer: 1/4 in. [6 mm]
◉What is the minimum thickness for a glass or acrylic strike-off
plate? Answer: 1/2 in. [12 mm]
