WVDOH (Soil & Aggregate Compaction
Inspector Exam) Questions and Answers |
Study Guide | Grade A+
• According to the Standard Specifications, soil, granular material, soft shale and
random material shall be place in embankments in successive layers not exceeding
_____________ thickness after compaction.
(Program Manual MP 717.04.21, Table C, Attachment #3) -✓✓6 inches
• When a soil has zero air voids, what does this mean? -✓✓The soil has been
compacted to the point that all air voids are filled with moisture.
• Who is responsible for quality control? -✓✓Contractor
• Who is responsible for acceptance testing? -✓✓Division of Highways
• What corrective action would be required by the contractor for a lot of
embankment material which exhibits pronounced rutting and pumping under the
weight of the construction equipment? -✓✓Scarify, aerate and re-compact before
conducting any additional testing or remove the material and replace it with
suitable material.
• According to the Standard Specifications, in places inaccessible to a roller, such
as adjacent to culverts, retaining walls and other structures, the fill materials shall
be place in __________ compacted layers uniformly compacted with approved
tampers.
(Standard Specifications Book Page 120) -✓✓4 inches
• What are the types of radiation produced by a nuclear gauge? -✓✓Alpha
Particles, Neutrons, Gamma, and Beta
• What are the following methods for protection from radiation produced by a
nuclear gauge? -✓✓Shielding, Time, and Distance
, • How are soils classified? -✓✓Particle Size
• In NO case should you place embankment fill when?
(Std. Specs. Book Page 119) -✓✓The Ground is Frozen
• What is the minimum percentage for 100% pay of a lot for quality index? -
✓✓80%
• What is the moisture tolerance when performing a One-Point Proctor? -✓✓+3/-4
Percent
• What are the requirements for a compactor used in a soft shale harness test? -
✓✓The compactor must have a minimum coverage of 500 pounds per linear inch,
or 500 pounds per square inch of tamping foot contact
• 50-feet of 84-inch corrugated metal pipe is being backfilled. The thickness of the
backfill will be 9-feet. How many lots of backfill will be required? -✓✓6 Lots
• A lift of embankment material is being placed. The material consists of soft shale
and soil. What would you call the material?
(Std. Specs. Book Page 978 - Section 716) -✓✓Random Material
• Compaction of embankment and subgrade shall meet requirements set forth in? -
✓✓Section 716 Standard Specifications Book Page 978
• A lift of earthwork material contains approximately 50% rock and 50% random
materials. What is the MAXIMUM lift thickness?
(Std. Specs. Book Page 121 - Section 207) -✓✓12 inches
• According to MP 207.07.02, which of the following materials would have a
specific gravity of 2.6?
(Program Manual Page 7 of 12) -✓✓Gravel
Inspector Exam) Questions and Answers |
Study Guide | Grade A+
• According to the Standard Specifications, soil, granular material, soft shale and
random material shall be place in embankments in successive layers not exceeding
_____________ thickness after compaction.
(Program Manual MP 717.04.21, Table C, Attachment #3) -✓✓6 inches
• When a soil has zero air voids, what does this mean? -✓✓The soil has been
compacted to the point that all air voids are filled with moisture.
• Who is responsible for quality control? -✓✓Contractor
• Who is responsible for acceptance testing? -✓✓Division of Highways
• What corrective action would be required by the contractor for a lot of
embankment material which exhibits pronounced rutting and pumping under the
weight of the construction equipment? -✓✓Scarify, aerate and re-compact before
conducting any additional testing or remove the material and replace it with
suitable material.
• According to the Standard Specifications, in places inaccessible to a roller, such
as adjacent to culverts, retaining walls and other structures, the fill materials shall
be place in __________ compacted layers uniformly compacted with approved
tampers.
(Standard Specifications Book Page 120) -✓✓4 inches
• What are the types of radiation produced by a nuclear gauge? -✓✓Alpha
Particles, Neutrons, Gamma, and Beta
• What are the following methods for protection from radiation produced by a
nuclear gauge? -✓✓Shielding, Time, and Distance
, • How are soils classified? -✓✓Particle Size
• In NO case should you place embankment fill when?
(Std. Specs. Book Page 119) -✓✓The Ground is Frozen
• What is the minimum percentage for 100% pay of a lot for quality index? -
✓✓80%
• What is the moisture tolerance when performing a One-Point Proctor? -✓✓+3/-4
Percent
• What are the requirements for a compactor used in a soft shale harness test? -
✓✓The compactor must have a minimum coverage of 500 pounds per linear inch,
or 500 pounds per square inch of tamping foot contact
• 50-feet of 84-inch corrugated metal pipe is being backfilled. The thickness of the
backfill will be 9-feet. How many lots of backfill will be required? -✓✓6 Lots
• A lift of embankment material is being placed. The material consists of soft shale
and soil. What would you call the material?
(Std. Specs. Book Page 978 - Section 716) -✓✓Random Material
• Compaction of embankment and subgrade shall meet requirements set forth in? -
✓✓Section 716 Standard Specifications Book Page 978
• A lift of earthwork material contains approximately 50% rock and 50% random
materials. What is the MAXIMUM lift thickness?
(Std. Specs. Book Page 121 - Section 207) -✓✓12 inches
• According to MP 207.07.02, which of the following materials would have a
specific gravity of 2.6?
(Program Manual Page 7 of 12) -✓✓Gravel
