CCIL CCIL - Canadian Council of Independent Laboratories Soil Testing and Geotechnical Analysis Questions and Answers 2

Question 1

Which ASTM standard covers the Modified Proctor compaction test used when higher compactive effort is required for subgrade evaluation?

Accepted Answer

ASTM D1557

Answer

ASTM D698

Answer

ASTM D4253

Answer

ASTM D2049

Question 2

In a hydrometer analysis of fine-grained soils, what physical law governs the settling velocity of particles in suspension?

Accepted Answer

Stokes' Law

Answer

Darcy's Law

Answer

Bernoulli's Principle

Answer

Henry's Law

Question 3

What is the purpose of the meniscus correction applied when reading a hydrometer during a particle-size analysis?

Accepted Answer

To account for the curved water surface at the hydrometer stem

Answer

To correct for temperature variation in the water bath

Answer

To adjust for dispersing agent concentration

Answer

To normalize results to a standard specific gravity of solids

Question 4

During field density testing with a nuclear density gauge, what type of radiation is used to measure soil moisture content?

Accepted Answer

Neutron radiation from an Americium-Beryllium source

Answer

Gamma radiation from a Cesium-137 source

Answer

Alpha radiation from a Radium source

Answer

Beta radiation from a Strontium source

Question 5

What AASHTO classification would a soil with a liquid limit of 45 and plasticity index of 20 most likely fall under?

Accepted Answer

A-7-6

Answer

A-4

Answer

A-2-4

Answer

A-6

Question 6

What is the CCIL Type I certification specifically designed for technicians performing?

Accepted Answer

Soils and aggregates field testing and sampling

Answer

Concrete field testing and sampling

Answer

Asphalt mix design and sampling

Answer

Laboratory chemical analysis