Question

1) A Standard Penetration Test (SPT was performed at a depth of
10 ft in sand of unit weight 125 lb/ft^{3}. The N-value was
found to be 30. Determine the corrected N-value.

C_{N} = 0.77 x log_{10} (20/p_{o})

- A. 32
- B. 34
- C. 37
- D. 40

2) A standard penetration test was conducted in the field. The boring logger recorded following three readings for 6 inch interval of penetration: 1/2/3. What is N-value?

- A. 3
- B. 5
- C. 2
- D. 6

3) Which of the following tests cannot be performed on disturbed clay samples retrieved from a site?

- A. Water content
- B. Soil classification
- C. Falling head permeability
- D. Standard Proctor compaction

4) Which of the following test requires undisturbed soil sample?

- A. Sieve analysis
- B. Atterberg limit test
- C. Consolidation test
- D. Moisture content

5) Following is not commonly used type of boring for soil exploration?

- A. Auger boring
- B. Wash boring
- C. Rock coring
- D. Rotary drilling

6) What is the benefit of using hollow-stem auger?

- A. Disturbance of soil below borehole is slight
- B. Sampler can be inserted
- C. Can be used in most type of soils and even in rocks
- D. None of the above

Answer #1

1(c) using basic formula of SPTN you can get the answer

2(a) because during test, the number of blows required for starting two 6 inch penetration is neglected because these are provided for seating drive of split spoon sampler

3(a) if the sample get disturbed then water content of sample will get changed.

4(d) as due disturbance water content will change

5(c) rock coring is not soil exploration technique. It's related to rock mechanics or rock exploration

6(a) due to less friction, the disturbance would be very less

a)
A Standard Penetration Test (SPT) is conducted to measure the in
situ strength of A-7-6 subgrade soil. The number of blows required
to drive the split spoon sampler into the ground were as
follows
b)
The maximum dry density for a soil obtained in the lab at 11%
moisture content is 122.4 pcf If the measured field bulk density
was 131.6 pcf at 10% water content, what is the percent compaction
achieved for this soil in the field?
C)...

Describe how the Standard Penetration Test (SPT) is conducted.
How is the raw number of blow count (N) computed? What corrections
are performed to obtained (N1)60?

An independent-samples t test is performed on the
samples below:
Sample 1: M = 24.1, s2 = 32.02,
n = 10
Sample 2: M = 19.4, s2 = 44.46,
n = 10
a.)Calculate the standard error for the t test
(sM1-M2). (Round to 4 decimal
places.)
b.)Calculate the degrees of freedom for the t test.
c.)Find the critical value of t with two tails and
alpha = 0.05. (Keep 3 decimal places.)
d.)Calculate the t test. (Round answer to two decimal
places.)

I. Solve the following problem:
For the following data:
1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6 n = 12
b) Calculate
1) the average or average
2) quartile-1
3) quartile-2 or medium
4) quartile-3
5) Draw box diagram (Box & Wisker)
II. PROBABILITY
1. Answer the questions using the following
contingency table, which collects the results of a study to 400
customers of a store where you want to analyze the payment
method.
_______B__________BC_____
A...

1) When we fit a model to data, which is typically larger?
a) Test Error b) Training Error
2) What are reasons why test error could be LESS than training
error? (Pick all that applies)
a) By chance, the test set has easier cases than the training
set.
b) The model is highly complex, so training error systematically
overestimates test error
c) The model is not very complex, so training error
systematically overestimates test error
3) Suppose we want to...

1. Find the area under the standard normal curve (round to four
decimal places)
a. To the left of z=1.65
b. To the right of z = 0.54
c. Between z = -2.05 and z = 1.05
2. Find the z-score that has an area of 0.23 to its right.
3. The average height of a certain group of children is 49
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1. In a multiple
regression model, the following coefficients were obtained:
b0 = -10 b1
= 4.5 b2 = -6.0
a. Write the
equation of the estimated multiple regression model. (3 pts)
b Suppose a
sample of 25 observations produces this result, SSE = 480. What is
the estimated standard error of the estimate? (5 pts)
2. Consider the
following estimated sample regression equation:
Y = 12 + 6X1 -- 3 X2
Determine which of the following
statements are true,...

MATHEMATICS
1. The measure of location which is the most likely to
be
influenced by extreme values in the data set is the a. range
b.
median c. mode d. mean
2. If two events are independent, then a. they must be
mutually
exclusive b. the sum of their probabilities must be equal to one
c.
their intersection must be zero d. None of these alternatives
is
correct. any value between 0 to 1
3. Two events, A and B,...

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