NICET Soils Level 1 Certification Actual Exam – 150
Multiple-Choice Questions with Detailed Answers 2026
|INSTANT PDF DOWNLOAD
Introduction:
This comprehensive NICET Soils Level 1 Practice Exam is designed to simulate the actual certification
exam for engineering technicians specializing in soil and geotechnical work. It contains 150 multiple-
choice questions covering all key topics, including:
Soil classification (coarse-grained and fine-grained soils)
Soil properties (plasticity, compressibility, shear strength, permeability)
Field testing and sampling techniques (SPT, pocket penetrometer, nuclear density, Shelby tubes)
Laboratory testing (Atterberg Limits, Proctor compaction, sieve analysis, permeability tests)
Soil compaction and relative density
Safety protocols during field operations
Each question includes the correct answer in bold and a detailed rationale to reinforce understanding
and prepare candidates thoroughly for the NICET Level 1 Soils exam.
1. Which soil classification system is commonly used in the NICET Soils Level 1
exam?
A. Unified Soil Classification System (USCS)
B. AASHTO Soil Classification
C. USDA Soil Texture Triangle
D. Both A and B
**Explanation: NICET uses both USCS and AASHTO classification for identifying soils in
construction and testing.
2. What is the primary purpose of a Proctor test?
A. Measure soil permeability
B. Determine maximum dry density and optimum moisture content
C. Classify soil grain size
D. Test soil pH
**Explanation: The Proctor test measures how soil compacts under controlled moisture
conditions.
,3. Which of the following field tests is used to determine soil consistency?
A. Standard Penetration Test (SPT)
B. Atterberg Limits
C. Pocket Penetrometer Test
D. Grain size analysis
**Explanation: The pocket penetrometer measures soil consistency in fine-grained soils.
4. When performing a field density test using the sand cone method, what must be
determined?
A. Soil pH
B. Wet and dry soil density
C. Soil compaction class
D. Water table depth
**Explanation: The sand cone test measures field density to verify compaction
requirements.
5. Which soil type typically has the highest plasticity?
A. Gravel
B. Sand
C. Clay
D. Silt
**Explanation: Clay soils have small particles and strong cohesion, leading to higher
plasticity.
6. The Standard Penetration Test (SPT) N-value indicates:
A. Soil moisture content
B. Soil permeability
,C. Soil relative density or resistance to penetration
D. Soil pH
**Explanation: The SPT N-value is the number of blows required to drive a sampler and
indicates relative soil density.
7. Which method is commonly used for collecting a disturbed soil sample?
A. Shelby tube
B. Shovel or auger
C. Thin-walled tube
D. Standard Penetration sampler
**Explanation: Disturbed samples are collected with shovels or augers; they do not
preserve natural structure.
8. Which method is used to obtain an undisturbed soil sample?
A. Hand auger
B. Shovel
C. Thin-walled tube (Shelby tube)
D. Split-spoon sampler
**Explanation: Undisturbed samples preserve natural structure, often using Shelby
tubes.
9. The liquid limit of soil is the water content at which soil:
A. Can no longer be molded
B. Crumbles when dried
C. Changes from plastic to liquid behavior
D. Drains freely
**Explanation: The liquid limit defines the moisture content where soil transitions from
plastic to liquid state.
, 10. In field compaction testing, what does the “relative compaction” represent?
A. Ratio of field moisture to dry density
B. Percentage of maximum dry density achieved in the field
C. Soil permeability
D. Plasticity index
**Explanation: Relative compaction compares field density to maximum dry density from
lab Proctor tests.
11. Which of the following is a coarse-grained soil?
A. Clay
B. Silt
C. Sand
D. Peat
**Explanation: Sand and gravel are considered coarse-grained soils.
12. What is the purpose of the Atterberg Limits test?
A. Measure soil permeability
B. Classify coarse-grained soils
C. Determine liquid, plastic, and shrinkage limits of fine-grained soils
D. Measure soil density
**Explanation: Atterberg Limits classify fine-grained soils by consistency and
plasticity.
13. Which of the following tools is used to measure field moisture content directly?
A. Proctor mold
B. Nuclear moisture-density gauge
Multiple-Choice Questions with Detailed Answers 2026
|INSTANT PDF DOWNLOAD
Introduction:
This comprehensive NICET Soils Level 1 Practice Exam is designed to simulate the actual certification
exam for engineering technicians specializing in soil and geotechnical work. It contains 150 multiple-
choice questions covering all key topics, including:
Soil classification (coarse-grained and fine-grained soils)
Soil properties (plasticity, compressibility, shear strength, permeability)
Field testing and sampling techniques (SPT, pocket penetrometer, nuclear density, Shelby tubes)
Laboratory testing (Atterberg Limits, Proctor compaction, sieve analysis, permeability tests)
Soil compaction and relative density
Safety protocols during field operations
Each question includes the correct answer in bold and a detailed rationale to reinforce understanding
and prepare candidates thoroughly for the NICET Level 1 Soils exam.
1. Which soil classification system is commonly used in the NICET Soils Level 1
exam?
A. Unified Soil Classification System (USCS)
B. AASHTO Soil Classification
C. USDA Soil Texture Triangle
D. Both A and B
**Explanation: NICET uses both USCS and AASHTO classification for identifying soils in
construction and testing.
2. What is the primary purpose of a Proctor test?
A. Measure soil permeability
B. Determine maximum dry density and optimum moisture content
C. Classify soil grain size
D. Test soil pH
**Explanation: The Proctor test measures how soil compacts under controlled moisture
conditions.
,3. Which of the following field tests is used to determine soil consistency?
A. Standard Penetration Test (SPT)
B. Atterberg Limits
C. Pocket Penetrometer Test
D. Grain size analysis
**Explanation: The pocket penetrometer measures soil consistency in fine-grained soils.
4. When performing a field density test using the sand cone method, what must be
determined?
A. Soil pH
B. Wet and dry soil density
C. Soil compaction class
D. Water table depth
**Explanation: The sand cone test measures field density to verify compaction
requirements.
5. Which soil type typically has the highest plasticity?
A. Gravel
B. Sand
C. Clay
D. Silt
**Explanation: Clay soils have small particles and strong cohesion, leading to higher
plasticity.
6. The Standard Penetration Test (SPT) N-value indicates:
A. Soil moisture content
B. Soil permeability
,C. Soil relative density or resistance to penetration
D. Soil pH
**Explanation: The SPT N-value is the number of blows required to drive a sampler and
indicates relative soil density.
7. Which method is commonly used for collecting a disturbed soil sample?
A. Shelby tube
B. Shovel or auger
C. Thin-walled tube
D. Standard Penetration sampler
**Explanation: Disturbed samples are collected with shovels or augers; they do not
preserve natural structure.
8. Which method is used to obtain an undisturbed soil sample?
A. Hand auger
B. Shovel
C. Thin-walled tube (Shelby tube)
D. Split-spoon sampler
**Explanation: Undisturbed samples preserve natural structure, often using Shelby
tubes.
9. The liquid limit of soil is the water content at which soil:
A. Can no longer be molded
B. Crumbles when dried
C. Changes from plastic to liquid behavior
D. Drains freely
**Explanation: The liquid limit defines the moisture content where soil transitions from
plastic to liquid state.
, 10. In field compaction testing, what does the “relative compaction” represent?
A. Ratio of field moisture to dry density
B. Percentage of maximum dry density achieved in the field
C. Soil permeability
D. Plasticity index
**Explanation: Relative compaction compares field density to maximum dry density from
lab Proctor tests.
11. Which of the following is a coarse-grained soil?
A. Clay
B. Silt
C. Sand
D. Peat
**Explanation: Sand and gravel are considered coarse-grained soils.
12. What is the purpose of the Atterberg Limits test?
A. Measure soil permeability
B. Classify coarse-grained soils
C. Determine liquid, plastic, and shrinkage limits of fine-grained soils
D. Measure soil density
**Explanation: Atterberg Limits classify fine-grained soils by consistency and
plasticity.
13. Which of the following tools is used to measure field moisture content directly?
A. Proctor mold
B. Nuclear moisture-density gauge
