ACI Certification- Concrete Field Testing Technician Grade 1
CP-1 (12) Questions and Answers
Question 1
After rodding each layer, what should be done to the measure before adding another layer of concrete?
Correct Answer
Tap the sides of the measure smartly 10 to 15 times with the mallet
Question 2
Start molding specimens for strength tests within how many minutes after fabricating the composite sample? (Oral Exam)
Correct Answer
15 min.
Question 3
When raising the slump mold, it should not be rotated or twisted. True or False?
Correct Answer
True
Page 1 of 41
,Question 4
The sample of concrete used for this test is to be obtained in accordance with what ASTM Standard?
Correct Answer
C172
Question 5
The interior surface of the slump mold is allowed to have minor irregularities. True or False?
Correct Answer
False
Question 6
How many times does the rolling operation occur?
Correct Answer
A minimum of 2, a maximum of 3
Question 7
The outside diameter or side dimension of the vibrating element must be at least _____ but not greater than _____ .
Correct Answer
0.75 in. [19 mm], 1.50 in. [38 mm]
Page 2 of 41
,Question 8
Prior to lifting the mold, concrete must be removed from _______.
Correct Answer
The area surrounding the base of the mold
Question 9
What type of alcohol and concentration must be used in this test method?
Correct Answer
Isopropyl, 70% by volume (65% by weight)
Question 10
Up to 48 hours after molding, test specimens that are to be standard cured shall be stored in a temperature range between
_____ to _____.
Correct Answer
60 and 80 ºF [16 and 27 ºC]
Question 11
If rodding is the method of consolidation being used, the measure must be filled in how many layers?
Correct Answer
3
Page 3 of 41
, Question 12
What is the required shape of the tamping end of the rod?
Correct Answer
Rounded to a hemispherical tip
Question 13
For cylinders with a diameter of 6 in. [150 mm] or greater, the tamping rod must be a round, straight steel rod with a
diameter of _____.
Correct Answer
5/8 ± 1/16 in. [16 mm ± 2 mm]
Question 14
When rodding the bottom layer, the tamping rod must be _____ to uniformly distribute the strokes.
Correct Answer
Slightly inclined
Question 15
The sensor of the temperature measuring device shall be submerged a minimum of ______ inches into the freshly mixed
concrete.
Correct Answer
3"
Page 4 of 41
CP-1 (12) Questions and Answers
Question 1
After rodding each layer, what should be done to the measure before adding another layer of concrete?
Correct Answer
Tap the sides of the measure smartly 10 to 15 times with the mallet
Question 2
Start molding specimens for strength tests within how many minutes after fabricating the composite sample? (Oral Exam)
Correct Answer
15 min.
Question 3
When raising the slump mold, it should not be rotated or twisted. True or False?
Correct Answer
True
Page 1 of 41
,Question 4
The sample of concrete used for this test is to be obtained in accordance with what ASTM Standard?
Correct Answer
C172
Question 5
The interior surface of the slump mold is allowed to have minor irregularities. True or False?
Correct Answer
False
Question 6
How many times does the rolling operation occur?
Correct Answer
A minimum of 2, a maximum of 3
Question 7
The outside diameter or side dimension of the vibrating element must be at least _____ but not greater than _____ .
Correct Answer
0.75 in. [19 mm], 1.50 in. [38 mm]
Page 2 of 41
,Question 8
Prior to lifting the mold, concrete must be removed from _______.
Correct Answer
The area surrounding the base of the mold
Question 9
What type of alcohol and concentration must be used in this test method?
Correct Answer
Isopropyl, 70% by volume (65% by weight)
Question 10
Up to 48 hours after molding, test specimens that are to be standard cured shall be stored in a temperature range between
_____ to _____.
Correct Answer
60 and 80 ºF [16 and 27 ºC]
Question 11
If rodding is the method of consolidation being used, the measure must be filled in how many layers?
Correct Answer
3
Page 3 of 41
, Question 12
What is the required shape of the tamping end of the rod?
Correct Answer
Rounded to a hemispherical tip
Question 13
For cylinders with a diameter of 6 in. [150 mm] or greater, the tamping rod must be a round, straight steel rod with a
diameter of _____.
Correct Answer
5/8 ± 1/16 in. [16 mm ± 2 mm]
Question 14
When rodding the bottom layer, the tamping rod must be _____ to uniformly distribute the strokes.
Correct Answer
Slightly inclined
Question 15
The sensor of the temperature measuring device shall be submerged a minimum of ______ inches into the freshly mixed
concrete.
Correct Answer
3"
Page 4 of 41
