Geotechnical Testing Midterm #2

Question 1

For a circular influence factor, what does “A” stand for?

Answer 1

A = Radius

Question 2

For a circular influence factor, what does “r” stand for?

Answer 2

r = radial distance from center to point

Question 3

For a circular influence factor, what does “z” stand for?

Answer 3

Depth to point

Question 4

True or false. A consolidation test starts undrained and the test allows drainage of the sample

Answer 4

True

Question 5

How do you calculate time to failure?

Answer 5

tf = 50 x t50

Question 6

How do you calculate max displacement rate (rate of strain)

Answer 6

rate of strain = Displacement Dist / t50

Question 7

How do you calculate h?

Answer 7

h = d50 / 2

Question 8

How do you calculate d0?

Answer 8

d0 = d0.1 + (d0.1- d0.4)

Question 9

How do you calculate d50?

Answer 9

d50 = (d100 + d0)/2

Question 10

What is the formula for OCR?

Answer 10

OCR = Pc/P0

Question 11

In the formula for OCR = Pc/P0, how do you find Pc

Answer 11

Pc is pulled off of the plot

Question 12

In the formula for OCR = Pc/P0, how do you find P0

Answer 12

Unit Weight x Depth