ACI Certification Field Testing Technician 2

Question 1

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

Accepted Answer

12 inches

Answer

The standard slump cone is 12 inches (305 mm) tall per ASTM C143.

Question 2

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

Accepted Answer

3 layers

Answer

ASTM C143 requires filling the cone in 3 equal layers, each rodded 25 times with a tamping rod.

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

ASTM C143 requires the complete procedure from start of filling to cone removal to be done within 2 minutes and 30 seconds.

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

ASTM C143 specifies a 5/8-inch (16 mm) diameter, 24-inch (600 mm) long rod with a rounded hemispherical tip.

Question 5

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

Accepted Answer

1/4 inch

Answer

ASTM C143 requires reporting the slump to the nearest 1/4 inch (5 mm).

ACI (American Concrete Institute Certification) Practice Test