answers 2025\2026 A+ Grade
What does the Sand Cone Method Determine?
- correct answer In-place density of soil and aggregates
Mass for sand cone test should be recorded to nearest?
- correct answer 0.01lbs
Sand cone test can also be used to determine?
- correct answer Moisture content and dry mass of excavated soil
How to determine percent compaction?
- correct answer Dry Density/Lab max density x 100
What size particles should not be used during the sand cone test?
- correct answer Non-Cementous with few to no particles passing #200 sieve and non-retained in #10
sieve
What does the proctor test determine?
- correct answer Moisture density relationship of soils and soil-aggregates
What size molds are used for the proctor test?
- correct answer 4" molds and 6" molds
What size rammers are used for the proctor test?
- correct answer 5lbs with 12" drop and 10lbs with 18" drop
, How many blows are required per mold for proctor test?
- correct answer 25 blows for 4" mold and 56 blows for 6" mold
How many lifts are required per mold for proctor test?
- correct answer 4" mold requires 3 lifts while 6" mold requires 5 lifts
What is the requirement for compacted depth for proctor test?
- correct answer 5"
What is the purpose of Nuclear Density Gauge?
- correct answer Determines density of compacted material
When is backscatter method for nuclear density gauge used?
- correct answer When properties of the first few inches are concerned such as HMA
When is Direct Transmission for nuclear density gauge used?
- correct answer When properties are within 2"-12" are concerned such as compacted backfill
What is the spacing for multiple nuclear density gauge that are being conducted?
- correct answer Each test has to be spaced 30' from each other
What are the requirements when preparing to do the nuclear density test?
- correct answer 6" away from verticle projections and 24" away from a wall
What is the void space underneath the nuclear density gauge?
- correct answer 1/8"
What is the Wet Density test requirements for single direct transmission in soil conditions?
- correct answer CL: .94lb/ft^3,
SP: .74lb/ft^3
ML: 1.28lb/ft^3