Exam (elaborations)
NB ASBOG ASSORTED PG MATERIAL QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
- Course
- Institution
NB ASBOG ASSORTED PG MATERIAL QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
[Show more]
Seller
Follow
Content preview
NB ASBOG ASSORTED PG MATERIALQUESTIONS AND ANSWERS WITH
SOLUTIONS 2024
If more than 50% of soil is retained on the No. 200 sieve (0.003 inch), the soil is classified as: - ANSWER
Coarse grained
What sieve number is the boundary for coarse and fine grained soils? - ANSWER No. 200 (0.003 inch)
If more than 50% of soil is retained on the No 4 sieve, it is classified as a: - ANSWER Gravel
Material retained on this sieve number represents the smallest particle size visible to the unaided eye: -
ANSWER No. 200 (0.003 inch) sieve
The larger the "us standard sieve" number, the _____ the particle size. - ANSWER Smaller.
For example, gravel is retained on the no. 4 sieve, medium sand is retained on the no. 40 sieve, and find
grained sand is retained on the no. 200 sieve.
A soil is considered poorly graded if it contains ____ or fewer sieve sizes. - ANSWER 3
For a gravel or sand to be assigned a W or P, there must be what percentage or lower of fines? - ANSWER
<5% fines
A well-graded soil has a Uniformity coefficient of greater than ___ for gravel and ___ for sand - ANSWER
4, 6
If there are between 5% and 12% fines in a gravelly or sandy soil, what would the classification look like?
- ANSWER It would be a dual classification, showing the first group symbol plus a second that indicates
"with clay" or "with silt"
Eg:
GW-GM- well graded gravel with silt
SP-SC- poorly graded sand with clay
, Symbols used when fines exceed 12% of total sample weight - ANSWER "C" or "M"
Eg:
GM- silty gravel
SC- clayey sand
Uniformity coefficient equation - ANSWER Cu= D60/D10
Curvature coefficient equation - ANSWER Cc=D30^2/D10•D60
_____ have little to no strength when dry, while ____ have considerable strength. - ANSWER Silts, clays
The plasticity index value is determined using what lab method? - ANSWER Atterburg Limits test
Fine grained soils with a LL >50 are assigned what symbol? - ANSWER H (high plasticity)
Fine grained soils with LL<50 are assigned what symbol? - ANSWER L (low plasticity)
Fine grained soils with 30% or more coarse grained fractions should be modified with these descriptive
words: - ANSWER Gravelly or sandy
Dry strength _____ with increased plasticity - ANSWER Increases
Three field identification procedures for fine grained soils - ANSWER 1. Dry strength (crushing
characteristics)- silts and silty sands have a low dry strength, while clays have high strength
2. Dilatancy (reaction to shaking)- fine, clean sands exhibit water when shaken and disappearance of
water when squeezed, clays show no reaction.
3. Toughness (consistency near the plastic limit)- high plasticity clays form a tougher tread and stiffer
lump when it crumbles (reaches plastic limit)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller PASSINGPOINT. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79373 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now