NICET Highway Construction Materials Testing 2

Question 1

What test determines the structural adequacy of a compacted subgrade or base course for highway construction?

Accepted Answer

California Bearing Ratio (CBR) Test

Answer

The CBR Test measures the load-bearing capacity of subgrade and base course materials, providing data used to design pavement thickness.

Question 2

What is the significance of the 95% compaction specification commonly used in highway construction?

Accepted Answer

Required degree of compaction relative to laboratory maximum dry density

Answer

A 95% compaction specification requires the field-compacted density to be at least 95% of the maximum dry density determined in the laboratory Proctor test.

Question 3

Which test measures the consistency of freshly mixed Portland cement concrete?

Accepted Answer

Slump test

Answer

The slump test measures the consistency and workability of fresh concrete by measuring the vertical drop of a truncated cone of concrete after the mold is removed.

Question 4

At what age is the standard compressive strength of concrete cylinders typically tested per ASTM C39?

Accepted Answer

28 days

Answer

The standard compressive strength of concrete is determined at 28 days, which represents the design strength used for most structural applications.

Question 5

What NICET HCMT work element covers asphalt concrete (hot mix asphalt) testing?

Accepted Answer

Asphalt Concrete

Answer

The Asphalt Concrete work element within NICET HCMT covers testing procedures for hot mix asphalt (HMA) including Marshall and Superpave mix design.

NICET - National Institute for Certification in Engineering Technologies Practice Test

NICET - National Institute for Certification in Engineering Technologies Practice Test

NICET Highway Construction Materials Testing 2