1). with the aid of a diagram describe the three zones found in facultative ponds.

2).Name the bacteria types found in each of the three zones found in the facultative ponds and give the role each bacteria type play in wastewater treatment

3) Explain the interpendence between the algae and bacteria that occur in waste stabilization ponds

The fumigation plume is one of the most environmentally detrimental plume types.

a. Draw a fumigation flume, along with its corresponding graph, i.e., elevation (m) vs temperature (°C).

b. Why does fumigation plume occur? Discuss on the basis of atmospheric temperature and stability

Two types of flaws may occur during the fabrication of steel beams: (1) the inclusions of small quantity of foreign matter “slag”; and (2) the existence of microscopic cracks. It has been found by careful laboratory investigation that for a certain size I-beam from a given fabricator, the mean distance between microscopic cracks is 40 feet along the beam, whereas the slag inclusions exist with an average rate of four (4) per 100 ft. of the beam. Each of these types of flaws follow a Poisson process.

a) For a 20-ft I-beam, what is the chance of finding exactly two microscopic cracks in the beam?

b) For the beam in a, what is the probability of finding one or more slag inclusions?

c) If a 20-ft beam contained more than two flaws, it would be rejected. What is the probability of rejecting a 20-ft beam?

d) Four 20-ft beams were supplied to a contractor by this fabricator last year. Assume that the flaw conditions among the four beams are statistically independent. What is the probability that only one beam had been rejected?

what are the substances that occur naturally ?

8. When fossil fuel is burned, many different types of carbon-based molecules can be emitted. Of all carbon-based emissions, carbon dioxide is the best-case scenario given what will occur to the other carbon-based emissions. Explain why you agree or disagree with the previous statement and the consequence of this fact. (SHORT ESSAY)

Why metallic bonds result in well-ordered crystals.

Why can metallic bonds be conductive?

Describe three types of defects that can occur in crystal structures.

Skyward Construction has just purchased a new D9 bulldozer for $675,000. The annual insurance is $7,000. The annual maintenance cost for the first 4 years is $12,500, at which time the equipment is given a major overhaul for $75,000. For the next 4 years the annual maintenance cost is $22,500. At that time the piece has a salvage value of $100,000. Draw the cash flow diagram. What is the present value of the investment? What is the EUAC? Assume a 5.% annual inflation rate.

In a CM at Risk (CM/GC) project, is there privity of contract between the general contractor and the architect? Explain.

On a construction project, who ultimately pays for bonds and insurance?

1. Given the following information, determine the burdened hourly wage rate for a carpenter. Assume the carpenters take full advantage of the retirement benefit.

Wage rate - $23.00/hour

Hours worked - 45 hours/week for 30 weeks, and 40 hours per week for 20 weeks

Vacation, holidays, and sick leave – two weeks at 40 hours/week

Overtime – Time-and-a-half for any hours over 40 per week

Gas allowance - $150/month

Annual bonus - $300

Social Security – 6.2% on the first $106,800 of wages

Medicare – 1.45% of all wages

FUTA – 0.8% on the first $7,000 of wages

SUTA – 5.8% on the first $10,000 of wages

Worker’s compensation insurance - $12.25 per $100.00 of wages

General liability insurance – 0.55% of wages

Health insurance (company’s portion) - $450 per month per employee

Retirement - $0.50 per $1.00 contributed by the employee on 6% of the employee’s wages

law and ethics

Which is not true about CGL insurance

a. it provides protection against claims

b. insurance can be purchased on multiple layers

c. it can be a claim made or occurrence policy

d it protects against the insured loss rather than against the claim if the third party

5- On a Design-Build contract, who is responsible for paying to remedy a mistake made by a designer who has provided services compliant with the standard of care:

a. Design-build entity

b. Designer

c. Owner

d. Insurance company providing an E&O insurance policy

contractors must carry insurance to protect the business assets and because it is often required by the contract documents. Which statement is false Insurance is the same as bond Builders risk insurance can be extended to all direct loss causes. design build contractors should carry error and omissions insurance An umbrella insurance policy is often used to raise the limits of all other policies because it is cheaper