NICET CONSTRUCTION MATERIALS TESTING – SOILS LEVEL II EXAM 2026–2027 | COMPLETE STUDY GUIDE | VERIFIED PRACTICE QUESTIONS & DETAILED SOLUTIONS | LATEST UPDATED CERTIFICATION EXAM PREP

NICET CONSTRUCTION MATERIALS TESTING
– SOILS LEVEL II EXAM 2026–2027 |
COMPLETE STUDY GUIDE | VERIFIED
PRACTICE QUESTIONS & DETAILED
SOLUTIONS | LATEST UPDATED
CERTIFICATION EXAM PREP

NICET CONSTRUCTION MATERIALS TESTING – SOILS LEVEL II EXAM 2026–2027
COMPLETE STUDY GUIDE | VERIFIED PRACTICE QUESTIONS & DETAILED
SOLUTIONS



DOCUMENT OVERVIEW

• This comprehensive question practice exam is designed to thoroughly prepare
you for the NICET Level II Soils certification, covering all major testing procedures,
standards, and field applications you'll encounter in actual examination scenarios.

• Study this material by working through questions systematically, mastering the
EXPERT RATIONALE for each answer to build deep understanding of soil testing
principles, ASTM standards, and practical field applications rather than relying on
memorization alone.




QUESTION 1

What is the primary purpose of soil classification in construction materials
testing?

A) To determine the soil's color and texture

B) To categorize soils based on their engineering properties and predict their
behavior in construction applications

C) To measure the soil's density only

D) To identify fossils within the soil layer

,E) To calculate the soil's market value

✓ B) To categorize soils based on their engineering properties and predict
their behavior in construction applications

EXPERT RATIONALE: Soil classification systems, such as the Unified Soil
Classification System (USCS), are designed to group soils with similar engineering
characteristics. This allows engineers to predict how soils will behave under
different loading conditions, moisture changes, and environmental factors.
Understanding these properties is essential for foundation design, pavement
construction, and overall project success. Color and texture are descriptive but not
primary engineering classifiers.



QUESTION 2

Which of the following soil grain sizes is classified as clay according to the
Unified Soil Classification System?

A) Grains larger than 3 inches

B) Grains between 0.25 mm and 0.075 mm

C) Grains smaller than 0.002 mm (0.002 mm or less)

D) Grains between 2 mm and 0.25 mm

E) Grains between 75 mm and 25 mm

✓ C) Grains smaller than 0.002 mm (0.002 mm or less)

EXPERT RATIONALE: According to the USCS and ASTM standards, clay particles are
defined as those with a diameter of 0.002 mm or smaller. This classification is
based on both particle size and the behavior of the soil, particularly plasticity.
Particles larger than 0.002 mm are classified as silt or sand depending on their size.
Understanding these size classifications is fundamental to soil testing and
classification.



QUESTION 3

,What does the term "Atterberg limits" refer to in soil testing?

A) The maximum depth at which soil can be tested

B) The physical boundaries of a soil sample in the laboratory

C) Critical moisture content values that define the transition between different
states of soil consistency (liquid, plastic, and solid states)

D) The time limits for completing soil classification tests

E) The geographical boundaries of soil sampling areas

✓ C) Critical moisture content values that define the transition between
different states of soil consistency (liquid, plastic, and solid states)

EXPERT RATIONALE: Atterberg limits are specific moisture content values that
mark transitions in soil behavior. These include the liquid limit (LL), plastic limit (PL),
and shrinkage limit (SL). These tests are essential for understanding how a soil will
behave under different moisture conditions, which is critical for construction and
design decisions. The difference between liquid and plastic limits is called the
plasticity index (PI), which indicates how much the soil's strength changes with
moisture content.



QUESTION 4

Which ASTM standard specifies the procedure for the Proctor compaction
test?

A) ASTM D698

B) ASTM D1557

C) Both ASTM D698 and ASTM D1557

D) ASTM D2435

E) ASTM D4318

✓ C) Both ASTM D698 and ASTM D1557

, EXPERT RATIONALE: ASTM D698 covers the Standard Test Methods for Laboratory
Compaction Characteristics of Soil Using Standard Effort (Standard Proctor), while
ASTM D1557 covers Modified Effort (Modified Proctor with higher compactive
energy). Both standards are essential for NICET Level II professionals. The
difference between them is the compactive energy applied, which results in
different maximum dry densities and optimum moisture contents. Knowing both
standards is critical for specifications that reference either test.



QUESTION 5

What is the primary objective of the California Bearing Ratio (CBR) test?

A) To measure soil color intensity

B) To determine the soil's resistance to penetration and its suitability for use as a
base course in pavement construction

C) To identify soil mineralogy

D) To measure soil temperature changes

E) To assess soil smell characteristics

✓ B) To determine the soil's resistance to penetration and its suitability for
use as a base course in pavement construction

EXPERT RATIONALE: The CBR test, defined in ASTM D1883, measures a soil's
strength and its ability to support loads. The CBR value is expressed as a
percentage and compares the soil's bearing capacity to that of a standard crushed
stone. This test is fundamental in pavement design, as the CBR value directly
influences the required thickness of pavement layers. Higher CBR values indicate
stronger, more stable soils suitable for bearing loads.



QUESTION 6

In the Unified Soil Classification System, what does the symbol "GW"
represent?