ACI Certification Field Testing Technician 2

Question 1

Per ASTM C143, the height of the standard slump cone is:

Accepted Answer

12 inches

Answer

8 inches

Answer

10 inches

Answer

14 inches

Question 2

When performing the slump test per ASTM C143, the concrete is placed in the mold in:

Accepted Answer

3 layers

Answer

1 layer

Answer

2 layers

Answer

4 layers

Question 3

The entire slump test procedure from start of filling the mold to removal of the cone must be completed within:

Accepted Answer

2 minutes and 30 seconds

Answer

1 minute

Answer

5 minutes

Answer

10 minutes

Question 4

The tamping rod specified in ASTM C143 for the slump test is:

Accepted Answer

5/8 inch diameter, 24 inches long, hemispherical end

Answer

3/8 inch diameter, 18 inches long, bullet-pointed

Answer

1/2 inch diameter, 12 inches long, flat end

Answer

5/8 inch diameter, 18 inches long, flat end

Question 5

Per ASTM C143, the slump measurement is recorded to the nearest:

Accepted Answer

1/4 inch

Answer

1/8 inch

Answer

1/2 inch

Answer

1 inch

Question 6

If concrete produces a shear slump (falls to one side) on the first test attempt per ASTM C143, the technician should:

Accepted Answer

Repeat the test using a new sample from the same batch

Answer

Record it as a failed slump test

Answer

Average the partial slump result with zero

Answer

Add water to increase workability and retest

Question 7

Per ASTM C1064, a temperature-measuring device must remain immersed in fresh concrete for a minimum of:

Accepted Answer

2 minutes

Answer

30 seconds

Answer

1 minute

Answer

5 minutes