Soil Mechanics Exam #3- Questions & Answers

Soil Mechanics Exam #3- Questions &
Answers

A higher percentage of relative density means the soil is _________ compact Correct Ans-
more




If the void ratio in the field is lower, the soil is more compact with a _________ relative density
percentage Correct Ans-higher




Define vibratory roller Correct Ans-produce vertical force vibrations




Vibratory rollers that are used for gravel need to be Correct Ans-heavy and low frequency




Vibratory rollers working with sand need to be Correct Ans-light to medium weight with high
frequency




what do we use to measure the relative density in coarse soils in the field today Correct Ans-
nuclear density gauge



For Spring Consolidation, the percentage of consolidation when a load is applied but the pump
is closed is _______% Correct Ans-0

, For Spring Consolidation the % consolidation when the load is applied and immeadityl after the
pump is opened is Correct Ans-0




For spring Consolidation, when the water stops coming out of the pump, the % consolidation is
________% Correct Ans-100




For spring consolidation, even after consolidation is at 100%, True or False, There is still water in
the soil sample Correct Ans-true




The Virgin Consolidation Curve is ___________ consolidated soil Correct Ans-normally




To solve for the slope/gradient of the virgin consolidation curve the ____________ index is used
(Cc) Correct Ans-Compression




To solve for the recompression index slope we use _______________ or ___________
Correct Ans-Cr, Cs




The Recompression index curves are _____________________ soils Correct Ans-
overconsolidated




For NCC, the OCR values equals Correct Ans-1




NCC relies on _____________ value Correct Ans-Cc