Review Question:
1. How do painters, sculptors or architects create different textures on their work?

2. Why is design important for an artist! For an observer?

Design a concrete mixture that has a 28 day compressive strength of 4000 psi and a maximum size aggregate of 0.75 in. The concrete would be placed in a column exposed to freezing and thawing and will be in contact with a soil that has a sulfate content of 0.3%.

Step 1: Assemble information from specifications and local materials

Cement:

Use any type and assume a specific gravity of 3.15

Coarse Aggregate:

Bulk Specific Gravity (BSG) – 2.65

Absorption Capacity – 1.5%

Surface Moisture – 1.0%

Dry-Rodded Unit Weight = 105 lb/ft^3

Fine Aggregate:

Bulk Specific Gravity (BSG) – 2.75

Absorption Capacity – 1.0%

Surface Moisture – 3.0%

Fineness Modulus – 2.7

Step 2: Select Slump

Step 3: Determine the maximum size of the aggregate

Step 4: Estimate the mix water and the air content

Step 5: Choose the water-to-cement ratio

Step 6: Determine the Cement Content

Step 7: Estimate the Coarse Aggregate Content

Step 8: Estimate the Fine Aggregate Content for a cubic yard

Step 9: Adjust for Moisture

Step 10: Summarize batch proportions in a table

Question 1

1. Calculate the Hydraulic Radius for a trapezoidal channel that has a bottom width of 4 feet, side slopes, s = 20, a Manning’s n value of 0.012, and bottom slope of 1.5%, and a depth of flow of 1 foot.

   	a.	0.54 ft
   	b.	1.3 ft
   	c.	2.1 ft
   	d.	2.9 ft
   	e.	3.7 ft

2 points

Question 2

1. A trapezoidal channel that has a bottom width of 4 feet, side slopes 2:1 (H:V) and bottom slope of 1.0%. Calculate the Froude Number for a flow of 77,000 GPM. Assume (n = 0.025).

   	a.	0.12
   	b.	0.35
   	c.	0.55
   	d.	0.77
   	e.	1.07

2 points

Question 3

1. A rough concrete (n = 0.018) rectangular channel that has a bottom width of 3.0 feet and bottom slope of 1.31%. Calculate the normal depth for a flow of 68 cfs.

   	a.	1.5 ft.
   	b.	2.0 ft.
   	c.	2.5 ft.
   	d.	3.0 ft.
   	e.	3.5 ft.

Describe (1)why the improved approaches for the site characterization is needed, and (2) key
characteristics of the improved approaches.

Workers’ compensation represents a compromise between the needs of employees and the needs of employers.

Question 2 (2 points)

Contributory negligence means that an employee knew that the job involved risk; he or she could not expect to be compensated when the risks resulted in accidents and injuries.

Question 3 (2 points)

There are three types of workers’ compensation insurance: state funds, private insurance, and self-insurance.

Question 4 (2 points)

Temporary disability:

Question 5 (2 points)

Which of the following is the whole-person theory of handling permanent partial disability cases?

Crane stability is one of the major concerns to construction managers when it comes to site safety. There are several factors involved with the safety that you as a manager need to carefully consider. List at least three factors associated with the crane safety or stability issue and briefly discuss each of the factors.

By now, you should have listened to the audio lecture, read the chapter, and taken the self-assessment and quiz. For this discussion activity, I want you to respond to the following question in the Discussion area in this learning module.

• Tower cranes have tall vertical, latticed masts or towers and horizontal booms called "jibs". There are several different types of jibs available for tower cranes. List at least three jibs and briefly describe each jib type.

By now, you should have listened to the audio lecture, read the chapter, and taken the self-assessment and quiz. For this discussion activity, I want you to respond to the following question in the Discussion area in this learning module.

• Clamshells are one of the special excavator types and sometimes clamshells are compared with draglines. List and discuss at least three different points between the two (Dragline vs. Clamshell) in terms of operations, productivity, etc. Do research on the internet, if necessary.

Same as Problem 13.5.A, except span = 18 ft, superimposed dead load = 50 psf, live load = 75 psf, f ′ c = 4 ksi, fy = 60 ksi.

*Problem 13.5.A: A one-way solid concrete slab is to be used for a simple span
of 16 ft. In addition to its own weight, the slab carries a superimposed dead
load of 40 psf and a live load of 100 psf. Using the strength method with
f ′c = 3 ksi and fy = 40 ksi, design the slab for minimum overall thickness.

work physiology/thermoregulation of "running the case" onshore oil rig?

Thanks

single choice

Select the correct statement about batch equilibrium test
A.   Through batch equilibrium test, a breakthrough curve can be obtained.
B.   A large soil sample is used in the batch equilibrium test.
C.   The transit time can be determined through batch equilibrium test.
D.   Sorption isotherm can be obtained through batch equilibrium test.

Select the incorrect statement about phased approach for the site characterization
A.   A fixed work plan must be strictly followed in the phased approach.
B.   The on-site interpretation of obtained data can be conducted in the phased approach.
C.   A fixed offsite laboratory is needed for the chemical analysis on the collected samples
D.   Compared with phase I, same sampling strategy, field investigation method and
analytical methods are adopted in phase II and subsequent phases.

single choice

Select the incorrect statement about phased approach for the site characterization

A.   A fixed work plan must be strictly followed in the phased approach.

B.   The on-site interpretation of obtained data can be conducted in the phased approach.

C.   A fixed offsite laboratory is needed for the chemical analysis on the collected samples

D.   Compared with phase I, same sampling strategy, field investigation method and analytical methods are adopted in phase II and subsequent phases.

Which of the following issues may take place in the leachate collection system.

A.   Freezing induced cracks

B.   Reduction of hydraulic conductivity.

C.   Stress cracking

D.   Swelling induced by the hydration process

If you had the opportunity to make a policy recommendation to a high-level federal administrator regarding energy policy for the next 25 years, what would it be and why?