What do you believe is a reasonable availability or utilization rate (the percentage of your time that is charged to billable projects) is for a staff engineer one month after the engineer starts working for the company after just graduating from college?

1. 6 Months?
2. 1 Year?
3. Explain the reasoning for your responses

A factory disposes 1.1 m³/s of treated industrial wastewater into a river. The wastewater has an ultimate biochemical oxygen demand of 25 mg/L and dissolved oxygen of 2 mg/L. Just upstream of the wastewater outfall, the river has a flow rate of 10 m³/s, ultimate biochemical oxygen demand of 6 mg/L, and oxygen deficit of 2 mg/L. At the river temperature, the saturation concentration of dissolved oxygen is 9 mg/L. The deoxygenation coefficient is 0.19 d^-1 and reaeration coefficient is 0.11 d^-1. The velocity of the river is 0.4 m/s.

(a) What is the ultimate biochemical oxygen demand (mg/l) immediately downstream of the outfall?

(b) What is the dissolved oxygen (mg/L) immediately downstream of the outfall?

(c) What is the oxygen deficit (mg/L) 97 km downstream of the discharge point?

(d) What is the maximum oxygen deficit (mg/l) along the river, and where does it occur (km)?

A rectangular beam of base b = 50 mm and height h = 25 mm is bent into a curved beam of 100 mm radius (R), and is subjected to a bending moment M of 500 N-m. Determine: The largest tensile and compressive stresses, how do the above values compare with the ones for straight beam?

5. Name the two types of fatigue cracking and the critical pavement locations.

Type:                              Critical location:    

Type:                                Critical location:

6. Name the causes typically associated with both types of fatigue cracking.

First Type:                             Causes:

Second Type:                         Causes:          

7. Name the type of loading typically used in the laboratory for evaluating:

Thin pavements        :          

Thick pavements       :          

8. In a typical conventional asphalt concrete pavement, keeping all other factors constant, (FILL IN THE BLANKS)

1. Increasing the HMA thickness typically                        fatigue cracking.

2. Increasing the HMA modulus typically                         fatigue cracking.

3. Increasing the wheel load typically                                fatigue cracking.

4. Increasing the tire pressure typically                             fatigue cracking.

17. List three computer programs that may be used to calculate pavement responses in flexible pavements.

18. In terms of fatigue cracking, a damage index, D, of 1.0 means that the roadway

19. List the three types of distortion.

20. __   ___           and __ _     __ are two mechanisms that cause rutting.

The head loss of a water of kinematic viscosity 1x10^-6 m^2/s in a 50mm diameter pipeline was 0.25m over a length

of 10 m at a discaherge of 2L/s. What is the corresponding discharge and hydraulic gradient when oil of kinematic viscosity 8.5x10^-6 m2/s flows through a 250mm diameter pipeline of the same relative roughness.

Water has total hardness of 155 mg/L as CaCO₃ and contains 0.004 M HCO₃^- at pH 7. What is the carbonate hardness and non-carbonate hardness in mg/L as CaCO₃? Would you use lime softening or lime-soda softening for this water and why?

“The Valuer is a reflector of markets and not the maker of market” Critically discuss the above statement.

Estimate the total cost for furnishing and installing floor joist and plywood sub-flooring given the following information:

a. Size of the building: 32 feet long and 18 feet wide

b. Spacing of floor joists: 2 feet on center

c. Double joist on ends plus joist header and footer

d. Size of floor joists: 18 feet long of 2x8 lumber

e. Productivity Rate: Lumber - 20 crew-hrs/MBFM and Plywood - 12 crew-hrs/MSF

f. Crew’s Wage Rate: $27.50/wk-hr

g. Material Costs: Lumber - $550/MBFM and Plywood - $1,100/MSF

TOTAL BOARD REQUIRED BFM -?

TOTAL PLYWOOD REQUIRED SF - ?

LUMBER MATERIAL COST $ LS -?

PLYWOOD MATERIAL COST $ LS -?

TOTAL MATERIAL COST $ LS -?

TOTAL LABOR COST $ LS - ?

TOTAL COST $ LS - ?

What are the potential upstream and downstream impacts of replacing the gravel parking lot with a tru-grid system? Please explain in detail

Calculate the total foot board measure and calculate the total cost for furnishing and installing the following pieces of dimensional lumber:

a. 270 – 2 x 4 – 8’0” 550 – 2 x 6 – 16’0” 1,820 – 2 x 4 – 12’0” 500 – 2 x12 – 16’0”

b. Productivity Rate: Lumber - 15 crew-hrs/MBFM

c. Crew’s Wage Rate: $26.75/wk-hr

d. Material Costs: Lumber - $550/MBFM

TOTAL BOARD REQUIRED BFM -?

TOTAL MATERIAL COST $ LS - ?

CREW HOURS REQUIRED HRS -?

TOTAL LABOR COST $ LS -?

TOTAL COST $ LS - ?

Two large tanks are connected by two pipes of different size in parallel. Water temperature is 20°C.

The surface water elevation in the upstream reservoir (Reservoir I) is 175m. The length of each pipe is 1250 m, and other properties are specified in the following:
Pipe A: diameter 0.5m, and frictional factor 0.025;

Pipe B: diameter 0.25m, the frictional factor is not given, but relative roughness is 0.006 under the flow condition observed.
Flow velocity in Pipe A is 2m/s.

1. a) (5 pts) Is the flow in pipe A laminar or turbulent? Support your answer with calculations

2. b) (10 pts) Find the water surface elevation of the downstream reservoir (Reservoir II) Z2 based on flow in pipe A.

3. c) (20 pts) Calculate the flow velocity in Pipe B.

4. d) (5 pts) Find the total flow rate from reservoir I to reservoir II.

A load trucks is using a hoe equipped with a special 3½ cy light weight bucket. Working efficiency is a 45 min-hr efficiency. The material is a sandy clay, 2,600 lb./lcy. The digging face will have an average height of 60% of max. digging depth and the angle of swing will always be less than 60º. The round-trip time of either truck, exclusive of load time, is 5 minutes Consider 2 truck sizes • 18 lcy and 26 lcy. • Operated the 18 LCY truck costs $55.62/hr • Operated the 26 LCY truck costs $73.18/hr • Operated the hoe costs $65.50/hr a. 10 pts.

a.Which haul fleet is cheaper?

b. 20 pts. You can increase your productivity with a better hoe operator, this new operation is reflecting an improvement of 5% of the loading cycle time. However, the Operated cost will increase from $65.50/hr to $68.05/hr. Does it make sense to improve the operation? (from a cost estimation point of view). What would you decide to do and why?