1. Contractors should include schedule time for excusable delays associated with change order requests. True or False

2. A contractor can bill and get paid for extra work before a change order is finalized.  True or False

3. When a contractor quotes a price for Owner requested extra work, the contractor must explain and support how the price was prepared with supporting documentation.True or  False

4.  A change order does not have to be in writing to be enforceable if an Architect directs a contractor to do extra work.   True or False

5. A contractor can claim additional field and home office overhead if the Owner issues a change order deleting 60% of the scope of work on a project. True or False

6. A contractor must continue with extra work while waiting for a change order approved by the Owner.  True or False

A 2-lane highway is to be constructed across a 6-ft diameter metal culvert which is oriented perpendecular to the highway center line. The culvert is located at station 33+00, and the invert (bottom) of the culvert has an elevation of 150 ft. The elevation of station 21+00 on the tangent alignment is 140 ft. The alignment gradient is +4.0% from station 21+00 to station 29+00, and the gradient from station 29+00 to 37+00 is –3%.

1. Find the longest full station vertical curve that will give approximately 3 ft (3 ± 0.5 ft) of cover over the top of the culvert.
2. Compute the station and elevation of the PVC and PVT and the elevation of each full station on the vertical curve.

A body of water is being retained by a concrete dam wall (15 ft high and 6 ft thick). What is the maximum height the water can rise without causing the intensity of pressure at the toe greater than twice the average pressure on the base? Assume that concrete weighs 150 lbs per cubic foot, there is no seepage causing uplift against the bottom of the wall, and water weighs 62.5 lbs per cubic foot.

Which of the following factors could result in you increasing your profit margin on a potential bid. a. Location of the project b. who the architect is c. the subcontractors d. who the owner is e. all of the above

3. An adjustment will need to be made to the total bid bond cost when. a. The contract bid amount changes b. The project duration is under 12 months c. The project duration is over 12 months d. A & B e. A & C

1. A lift station is to be designed to handle wastewater flows ranging from 400 gpm to 1500 gpm. The influent sewer invert elevation is 600 ft. The discharge line is 2,000 ft long with a high point elevation of 625 ft. A wet well diameter of 10 ft is to be used. Recommend the pump capacity, the number of pumps, and the TDH.

Assume the following:

     Maximum number of pump starts per hour = 5

     Hazen-Williams C = 100.

     Hydraulic losses in the pump station = 14 ft

     Freeboard allowance for influent sewer = 1 ft

1. 4: List and define the different way law firms bill their clients. What ethical obligation do attorneys have with respect to legal fee?

2. 5: How do lawyers and legal assistant keep track of their time? What is the difference between billable and nonbailable hours? What is a client must account?

(9) Assume on average 10 passengers arrive per minute. Assuming poisson arrivals and departures, estimate the gain (if any) in ‘average time spent in system per passenger’ if TSA decides to replace 4 type-A security scanners with 3 type-B security scanners. The service rate per scanner for type-A scanners is 3 passengers per minute and type-B scanners is 5 passengers per minute?

What is the importance of Evaluating the effectiveness of vehicle emissions testing and regulation in the United

states of America?

A water has a temperature of 10^o C and pH = 8. What should be the C.t value for 3-log Giardia removal using (a) chlorine, (b) chloramine. Assume a chlorine residual of 1.0 mg/L is required. If the chlorine dosage required to achieve this residual is 1.6 mg/L, what is the chlorine requirement in lbs/d for a 2 mgd water plant.