Virginia Heavy Highway (H/H) Specialty Exam – Batch 1
VIRGINIA HEAVY HIGHWAY BATCH 1 | EXAM QUESTIONS AND
CORRECT ANSWERS | VERIFIED HIGHWAY CONSTRUCTION,
MATERIALS AND SAFETY | LATEST 2026/2027
Virginia Heavy Highway Batch 1
VIRGINIA HEAVY HIGHWAY (H/H) SPECIALTY CONTRACTOR
1. When building a roadway embankment under VDOT specifications,
soil is generally placed in layers not exceeding what loose thickness
before compaction?
A. 8 inches
B. 12 inches
C. 18 inches
D. 24 inches
ANSWER : A. 8 inches
Thin lifts of no more than 8 in. loose allow the compactive effort to reach
the full depth of each layer and produce uniform density.
Page 1 of 59
, Virginia Heavy Highway (H/H) Specialty Exam – Batch 1
2. VDOT generally requires embankment soils to be compacted to at
least what percentage of maximum dry density?
A. 100 percent
B. 85 percent
C. 95 percent
D. 90 percent
ANSWER : C. 95 percent
Ninety-five percent of the laboratory maximum density is the common
acceptance target for embankment and subgrade layers.
3. Which type of roller is best suited for compacting cohesive clay soils?
A. Lightweight walk-behind plate compactor
B. Vibratory smooth-drum roller on high frequency
C. Sheepsfoot (padfoot) roller
D. Smooth steel-wheel static roller
ANSWER : C. Sheepsfoot (padfoot) roller
The protruding feet knead and compact clay from the bottom of the lift
upward, which is how cohesive soils respond best.
4. A vibratory smooth-drum roller is most effective when compacting:
A. Granular soils such as sand and gravel
B. Frozen soil
C. Peat and organic soils
D. Wet, highly plastic clay
ANSWER : A. Granular soils such as sand and gravel
Vibration rearranges granular particles into a denser arrangement; clays
respond better to kneading or pressure.
5. The optimum moisture content of a soil is best defined as the
moisture content at which:
A. The maximum dry density is obtained for a given compactive effort
B. The soil becomes fully saturated
C. The soil reaches its liquid limit
D. Water begins to seep from the soil surface
ANSWER : A. The maximum dry density is obtained for a given
compactive effort
The moisture-density curve peaks at optimum moisture; drier or wetter
soil compacts to a lower dry density.
Page 2 of 59
, Virginia Heavy Highway (H/H) Specialty Exam – Batch 1
6. The main purpose of proof rolling a subgrade with a heavily loaded
rubber-tired vehicle is to:
A. Measure the in-place moisture content
B. Seal the surface before paving
C. Locate soft or yielding areas that need correction
D. Establish final grade elevations
ANSWER : C. Locate soft or yielding areas that need correction
Visible deflection or rutting under the heavy load identifies weak spots
that must be reworked before base is placed.
7. Muck, peat, or other unsuitable material found within an
embankment foundation should normally be:
A. Covered with geotextile and left in place
B. Excavated and replaced with suitable material
C. Compacted with additional roller passes
D. Mixed with the first lift of embankment
ANSWER : B. Excavated and replaced with suitable material
Organic and compressible soils cause long-term settlement and instability,
so they are undercut and backfilled with approved material.
8. The primary reason for cutting benches into an existing hillside
before placing new fill is to:
A. Reduce the amount of fill needed
B. Key the new fill into the existing ground and prevent a slip plane
C. Provide a place to park equipment
D. Improve drainage away from the toe
ANSWER : B. Key the new fill into the existing ground and prevent a
slip plane
Benching removes the smooth interface between old and new material so
the embankment does not slide along it.
Page 3 of 59
, Virginia Heavy Highway (H/H) Specialty Exam – Batch 1
9. A clay subgrade that pumps and ruts under equipment after a rain is
most likely:
A. Too coarse-grained
B. Too wet and above optimum moisture
C. Over-compacted
D. Too dry and below optimum moisture
ANSWER : B. Too wet and above optimum moisture
Excess water fills voids and prevents densification; the usual fix is to disk
and aerate the soil until it dries toward optimum.
10. If 1,000 bank cubic yards of soil has a shrinkage factor of 10
percent, about how many compacted cubic yards will it produce?
A. 800 cubic yards
B. 900 cubic yards
C. 1,100 cubic yards
D. 1,000 cubic yards
ANSWER : B. 900 cubic yards
Compacted volume equals 1,000 x (1 - 0.10) = 900 cubic yards.
SECTION 2: SOILS IDENTIFICATION AND TESTING
11. A soil has a liquid limit of 45 and a plastic limit of 20. Its plasticity
index is:
A. 65
B. 20
C. 25
D. 2.25
ANSWER : C. 25
Plasticity index equals liquid limit minus plastic limit: 45 - 20 = 25.
Page 4 of 59
VIRGINIA HEAVY HIGHWAY BATCH 1 | EXAM QUESTIONS AND
CORRECT ANSWERS | VERIFIED HIGHWAY CONSTRUCTION,
MATERIALS AND SAFETY | LATEST 2026/2027
Virginia Heavy Highway Batch 1
VIRGINIA HEAVY HIGHWAY (H/H) SPECIALTY CONTRACTOR
1. When building a roadway embankment under VDOT specifications,
soil is generally placed in layers not exceeding what loose thickness
before compaction?
A. 8 inches
B. 12 inches
C. 18 inches
D. 24 inches
ANSWER : A. 8 inches
Thin lifts of no more than 8 in. loose allow the compactive effort to reach
the full depth of each layer and produce uniform density.
Page 1 of 59
, Virginia Heavy Highway (H/H) Specialty Exam – Batch 1
2. VDOT generally requires embankment soils to be compacted to at
least what percentage of maximum dry density?
A. 100 percent
B. 85 percent
C. 95 percent
D. 90 percent
ANSWER : C. 95 percent
Ninety-five percent of the laboratory maximum density is the common
acceptance target for embankment and subgrade layers.
3. Which type of roller is best suited for compacting cohesive clay soils?
A. Lightweight walk-behind plate compactor
B. Vibratory smooth-drum roller on high frequency
C. Sheepsfoot (padfoot) roller
D. Smooth steel-wheel static roller
ANSWER : C. Sheepsfoot (padfoot) roller
The protruding feet knead and compact clay from the bottom of the lift
upward, which is how cohesive soils respond best.
4. A vibratory smooth-drum roller is most effective when compacting:
A. Granular soils such as sand and gravel
B. Frozen soil
C. Peat and organic soils
D. Wet, highly plastic clay
ANSWER : A. Granular soils such as sand and gravel
Vibration rearranges granular particles into a denser arrangement; clays
respond better to kneading or pressure.
5. The optimum moisture content of a soil is best defined as the
moisture content at which:
A. The maximum dry density is obtained for a given compactive effort
B. The soil becomes fully saturated
C. The soil reaches its liquid limit
D. Water begins to seep from the soil surface
ANSWER : A. The maximum dry density is obtained for a given
compactive effort
The moisture-density curve peaks at optimum moisture; drier or wetter
soil compacts to a lower dry density.
Page 2 of 59
, Virginia Heavy Highway (H/H) Specialty Exam – Batch 1
6. The main purpose of proof rolling a subgrade with a heavily loaded
rubber-tired vehicle is to:
A. Measure the in-place moisture content
B. Seal the surface before paving
C. Locate soft or yielding areas that need correction
D. Establish final grade elevations
ANSWER : C. Locate soft or yielding areas that need correction
Visible deflection or rutting under the heavy load identifies weak spots
that must be reworked before base is placed.
7. Muck, peat, or other unsuitable material found within an
embankment foundation should normally be:
A. Covered with geotextile and left in place
B. Excavated and replaced with suitable material
C. Compacted with additional roller passes
D. Mixed with the first lift of embankment
ANSWER : B. Excavated and replaced with suitable material
Organic and compressible soils cause long-term settlement and instability,
so they are undercut and backfilled with approved material.
8. The primary reason for cutting benches into an existing hillside
before placing new fill is to:
A. Reduce the amount of fill needed
B. Key the new fill into the existing ground and prevent a slip plane
C. Provide a place to park equipment
D. Improve drainage away from the toe
ANSWER : B. Key the new fill into the existing ground and prevent a
slip plane
Benching removes the smooth interface between old and new material so
the embankment does not slide along it.
Page 3 of 59
, Virginia Heavy Highway (H/H) Specialty Exam – Batch 1
9. A clay subgrade that pumps and ruts under equipment after a rain is
most likely:
A. Too coarse-grained
B. Too wet and above optimum moisture
C. Over-compacted
D. Too dry and below optimum moisture
ANSWER : B. Too wet and above optimum moisture
Excess water fills voids and prevents densification; the usual fix is to disk
and aerate the soil until it dries toward optimum.
10. If 1,000 bank cubic yards of soil has a shrinkage factor of 10
percent, about how many compacted cubic yards will it produce?
A. 800 cubic yards
B. 900 cubic yards
C. 1,100 cubic yards
D. 1,000 cubic yards
ANSWER : B. 900 cubic yards
Compacted volume equals 1,000 x (1 - 0.10) = 900 cubic yards.
SECTION 2: SOILS IDENTIFICATION AND TESTING
11. A soil has a liquid limit of 45 and a plastic limit of 20. Its plasticity
index is:
A. 65
B. 20
C. 25
D. 2.25
ANSWER : C. 25
Plasticity index equals liquid limit minus plastic limit: 45 - 20 = 25.
Page 4 of 59
