2026 QUESTIONS WITH ANSWERS
◉ When rodding the bottom layer, the tamping rod must be _____ to
uniformly distribute the strokes. Answer: Slightly inclined
◉ What must be done if the concrete drops below the top of the
slump mold while the top layer is being rodded? Answer: Add
additional concrete to keep an excess of concrete above the top of
the mold at all times
◉ Prior to lifting the mold, concrete must be removed from _____.
Answer: The area surrounding the base of the mold
◉ After the final rodding, the sides of the slump mold should should
be tapped lightly with the tamping rod. True or False? Answer: False
◉ 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]
◉ What is the specified weight of the mallet used on measures that
are 0.5 ft^3 [14 L] or smaller? Answer: 1.25 +- 0.50 lb. [600 +- 200 g]
◉ Measures other than air meter bowls used for this test must
conform to ASTM _____. Answer: C29
◉ Air meter bowls used for this test must conform to ASTM _____ and
be calibrated for volumee according to ASTM _____. Answer: C231,
C29
◉ The concrete sample must be obtained in accodance with what
ASTM method? Answer: C172