CPII Material Testing 4

Question 1

A steel reinforcing bar is labeled '5 S 60'. What does '60' indicate?

Accepted Answer

The minimum yield strength is 60,000 psi

Answer

Grade 60 rebar has a minimum yield strength of 60,000 psi (60 ksi) per ASTM A 615 or A 706.

Question 2

Which test is used to evaluate the bond strength of a tack coat or prime coat in asphalt paving?

Accepted Answer

Pull-off adhesion test

Answer

The pull-off adhesion test measures the tensile bond strength between a pavement layer and the underlying surface or tack coat.

Question 3

What is the purpose of the Atterberg Limits test?

Accepted Answer

To define the moisture content boundaries between soil consistency states

Answer

Atterberg Limits (Liquid Limit, Plastic Limit, Shrinkage Limit) define the moisture contents at which fine-grained soils transition between solid, semi-solid, plastic, and liquid states.

Question 4

Concrete mix design specifies a maximum aggregate size of 1.5 inches. According to ACI 301, this size should not exceed:

Accepted Answer

All of the above apply

Answer

ACI 301 requires maximum aggregate size to satisfy all three criteria: 1/5 the narrowest form dimension, 3/4 the clear spacing between bars, and 3/4 the minimum clear cover.

Question 5

What does a 'Type III' cement designation indicate in concrete mix specifications?

Accepted Answer

High early strength cement

Answer

ASTM C 150 Type III is a high early strength Portland cement that achieves strength faster than Type I, often used in cold weather or early form removal situations.

(CPII) Certified Public Infrastructure Inspector Practice Test

(CPII) Certified Public Infrastructure Inspector Practice Test

CPII Material Testing 4