CPII Materials & Testing 2

Question 1

What does a slump test measure for freshly mixed concrete?

Accepted Answer

Workability/consistency

Answer

The slump test measures the workability or consistency of fresh concrete before placement.

Question 2

Which ASTM standard governs the sampling of freshly mixed concrete?

Accepted Answer

ASTM C172

Answer

ASTM C172 covers the standard practice for sampling freshly mixed concrete.

Question 3

A proctor test (ASTM D698) is used to determine which soil property?

Accepted Answer

Maximum dry density and optimum moisture content

Answer

The standard proctor test establishes a soil's maximum dry density at its optimum moisture content.

Question 4

What is the minimum curing period for standard concrete test cylinders before compressive strength testing at 28 days?

Accepted Answer

Cylinders must be moist-cured for the full 28 days

Answer

Per ASTM C31, standard-cured cylinders must remain in moist conditions until the time of testing.

Question 5

Which test determines the resistance of coarse aggregate to abrasion and impact?

Accepted Answer

Los Angeles abrasion test

Answer

The Los Angeles abrasion test (ASTM C131/C535) measures aggregate resistance to degradation by abrasion and impact.

(CPII) Certified Public Infrastructure Inspector Practice Test