VDOT SOILS AND AGGREGATE
COMPACTION: CHAPTER 1 EXAM
QUESTIONS AND ANSWERS 2026
VERIFIED.
True or false: The voids in a saturated soil are partly filled with water and partly filled with
water. - ANS False. In a saturated soil, the voids are entirely filled with water. (Zero Air Voids =
ZAV)
What classification systems does VDOT use to classify soils? - ANS VDOT uses AASHTO and
Unified Soil Classification Systems to classify soils.
What term refers to the texture and firmness of a soil? - ANS Consistency refers to the
texture and firmness of a soil.
Silts and clays are made of particles that are smaller than which sieve? - ANS Silt and clay are
made up of particles smaller than the No. 200 sieve (75 micrometers)
What term describes the distribution of various particle sizes with the material? - ANS The
gradation is the distribution of various particle sizes within the material.
What term describes that the particles in a mixture are sized so that they fill most of the voids
and there is very little space in between soil or stone particles? - ANS Dense graded means
that the particles in the mixture are sized do that they fill most of the voids; there is very little
space between the soil or stone particles.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 2
COMPACTION: CHAPTER 1 EXAM
QUESTIONS AND ANSWERS 2026
VERIFIED.
True or false: The voids in a saturated soil are partly filled with water and partly filled with
water. - ANS False. In a saturated soil, the voids are entirely filled with water. (Zero Air Voids =
ZAV)
What classification systems does VDOT use to classify soils? - ANS VDOT uses AASHTO and
Unified Soil Classification Systems to classify soils.
What term refers to the texture and firmness of a soil? - ANS Consistency refers to the
texture and firmness of a soil.
Silts and clays are made of particles that are smaller than which sieve? - ANS Silt and clay are
made up of particles smaller than the No. 200 sieve (75 micrometers)
What term describes the distribution of various particle sizes with the material? - ANS The
gradation is the distribution of various particle sizes within the material.
What term describes that the particles in a mixture are sized so that they fill most of the voids
and there is very little space in between soil or stone particles? - ANS Dense graded means
that the particles in the mixture are sized do that they fill most of the voids; there is very little
space between the soil or stone particles.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 2
