1. Explain how the following systems work:

a.

Constant-volume dual-duct system

b.

Variable air volume reheat system

c.

Fan Terminal Units

d.

Fan Coils

e.

Variable Refrigerant Flow (VRF)

f.

Radiant Heating and Cooling

g.

Chilled Beam

h.

Radian Floor System

i.

Water source heat pump

j.

Dedicated outside air system

A traffic signal has a cycle length of 90 seconds. For the travel direction of interest: (1) Green Time = 60 seconds; (2) Red Time = 30 seconds; (3) Arrival Rate = 30 veh/min; (4) Saturation Flow (i.e. the queue discharge rate) = 1 veh/sec.

a) Calculate the total delay (veh*s) for the travel direction of interest.

b) What is the maximum queue size (veh)?

Assume road works are taking place ON THE STREET, downstream from the intersection, so that only 40 veh/min (in the direction of interest) can pass. The departure from the signalised intersection will be the arrival at the work zone section. Assume that the queue at the downstream restriction never backs-up into the intersection.

c) Calculate the maximum queue (veh) caused by the street work in one traffic signal cycle.

d) Calculate the total delay (veh*s) caused by the street work in one traffic signal cycle.

Interview a program/project manager; it can be inside your organization or external to your organization, preferably this individual has more than ten-years’ experience in the profession.

ask the following:

What is your approach to managing a project?

What is your school of thought on project management? Do you prefer waterfall, agile methods etc.?

What skills does a program manager need to have in today’s market?

What is the greatest challenge as a program manager?

Where do you see program management going in the future?

How do you handle politics and conflict?

Write a 2 to 4 paragraph summary of the interview, from the above questions.

Using the regime-theory method, design a channel to carry wastewater from a manufacturing plant. Assume a design discharge of 950 ft3/s.950 ft3/s. The channel will have a sand bed and banks. Use a Manning’s roughness coefficient of 0.025.

Assume: Water Temp = 60°F, slope = 0.25%

A clean sand deposit has a total unit weight gabove the groundwater table of

18.9 kN/m3and a submerged unit weight of 9.84 kN/m3. The groundwater table

is located 1.5 m below ground surface. Standard penetration tests were

performed at 3 m below the ground surface with a blow count of 3 blows for

the first 150mm, 4 blows for the second 150mm and 5 blows for the third

150mm. Estimate the shear wave velocity of the sand at 3 m below the ground

surface. If a cone penetration test was performed at 3m below the ground

surface and the cone tip resistance was 3.9 MPa, estimate the shear wave velocity.

Compare the values obtained from both approaches.

(a) A snow sample 20 cm high melted into 3 cm of water. What was the density of the snow sample?
(b) What is the water equivalent of snow accumulation measuring 9 inches with a density of 8%?
(c) Compute the overall snow-water equivalent for a watershed for which following elevation-area-snow-water-
equivalents have been measured.

Elevation (m) 2000 2500 3000 3500 4000
Cumulative area (km2) 0 255 432 519 605
Snow-water equivalent (mm) 0 0 8 22 30

Hi I need Stress Strain Graphs to be made for the following data tables. There should be 3 graphs, one for each table. I also need to know what material each sample is made of. I assume this is calculated from calculating the Modulus of Elasticity E. However I do not really know. I appreciate everything. There is an image of the tables as well as the data itself below this post.

Include the Following

• Stress Strain graphs for each sample showing what variable and unit you have on both axes, and stating if it is sample 1, 2 or 3. Show the points in the graph and additionally a trendline.
• Explain how you got your conclusion (i.e., show your work) including how it was calculated/how you got it, what value it had and what you compared with.
• Your conclusion of what each of the three samples are made of.  

During the construction phase of a health-care project, delays not attributed to the

contractor were experienced, but the contractor was delayed in submitting all delay

information required by the contract until 7 days before the contractual completion date,

can the architect issue an extension of time prior to the completion date? Explain.

The city of Stillwater is planning to install a new settling tank as an upgrade to their existing water treat plant. You run a batch settling test using a 2.0 m column and coagulated water from their existing tank and collect the following data (Table 1). Using this data, design a settling tank to remove 65% of the influent suspended solids. Assume a design flow of 0.5 m³/s. Use scale up factors of 0.65 for overflow rate and 1.75 for detention time (Eckenfelder 1980). Discuss your results.

Table 1. Percent suspended solids removal as a function of time and depth.