Question

Name: 12. Which of the following represents the correct standard proctor test procedure? a. 3 soil layers, with 30 blows per layer using a 5.5 lb hammer dropped a distance of 12 inches b. 3 soil layers, with 25 blows per layer using a 10 lb hammer dropped a distance of 12 inches c. 5 soll layers, with 30 blows per loyer using a 10 lb hammer dropped a distance of 10 inches d. 3 soll layers, with 25 blows per loyer using a 5.5 lb hammer dropped a distance of 12 inches 13. Which of the following rollers are most effective in compacting clayey soills a. Smooth-wheelroller b. Pneumatic rubber-fired roller c. Sheepsfoot roller d. Vibratory roller 14. The hydraulic gradient, I can be expressed as which of the following a. Head Loss / Length b. Length / Head Loss c. Head Loss + Length d. Head Loss Length 15. True or False: The terms Hydraulic Conductivity and Coefficient of Permeability mean the same thing 16. Which of the following is the result of a volume change in a saturated cohesive sol because of expulsion of the water occupying the void spaces Q. Total Settlement b. Immediate Settlement d. Secondary Consolidation Settlement 17. Which of the following is the result of elastic deformation of dry soil and of moist and saturated solls without any change in the moisture content a. Total Settlement b. Immediate Settlement c. Primary Consolidation Settlement d. Secondary Consolidation Settlement 18. Which of the following is the term that represents the maximum effective past pressure that a soil has ever been subjected to a. Overburden Pressure b. Consolidation Pressure DODO ( Preconsolidation Pressure d. Maximum Geologic Pressure 19. Which of the following is the term that describes a soil that is not currently at the maximum state of stress because the maximum effective pressure occurred at some point in the past a. Underconsolidated b. Normally Consolidated c. Overconsolidated d. Preconsolidated 20. Which of the following is the term that represents the slope of the virgin consolidation curve a. Compression Index B. Consolidation Index C. Recompression Index d. Swell Index

Answer 1

(12) Standard Proctor test parameter soil layer = 3 no. of blows per layer: 25 blony weight of hammer (w) = 5.516 Height of free fall (h) = 12 inch I 61 Sheeps foot suller Clayey soll Compacting by are most Sreeps foot rolle - grained soile or Sand are most compacting by Vibratory roller [e] dul Hydraulic gradient (i a gt is defined as S ratio of head loss to lengin of solle in which head loss occur. hydraulic gradient i= head loss Length

(15) Hydraulic 1. Coefficient of (True) conductivity cks is permeability cky same as (16) Primany consolidation settlement » gt is . defined as volume of change in sole because of expulsion of water the void spaces saturated Conesine occupying (17) Immediate settlement gt is result of elastic deformation of dry soil and saturated soils with out any change in the moisture content is called immediate settlement (6] Secondary consolidation settlement at slarts after 1. Priman consolidation settlement and is due to plastic readjustment of some particle.

161 Preconsolidation Pressure f gt represener tre maximum soil has that a effective past pressure even been subjected. E] 13 OCR of Pressure oller consolidation ratio) = gt is ratio past applied maximam over consolidated to present applied Pressure OCR = Maximum - Present applied applied past pressure pressure TOCR>I C] Compression = index 1 Curve gt Slope represent of llirgin the consolidation (a (Void reten) effective strens (log scale)