Civil and Environmental Engineering Answers

If produced by Method A, a product’s initial capital cost will be $100,000, its operating cost will be

$20,000 per year, and its salvage value after 3 years will be $20,000. With Method B there is a first cost

of $150,000, an operating cost of $10,000 per year, and a $50,000 salvage value after its 3-year life.

Based on a present worth analysis at a 15% interest rate, which method should be used?

Geotagging is one of the applications of GPS on mobile devices. What is it? What are its

applications in the field of Civil Engineering?

The client was asked to design a high rise structure from scratch. They have designed the floor plan, the column design and the preliminary loads of the dead lid and live load on each floor for each column. Now at the phase where they would need to design and build a lateral system and calculate the loads and what it would look like/ what materials using RAM or other software. Currently having extreme difficulty within this they have included the design/ layout of the structure

you are to calculate and design lateral framing system for a high rise structure system. (already designed 40 stories only need the lateral calculation and design). High-rise alternates floor plan 5 times. Already have architectural drawings. Using RAM or other loading software to perform and demonstrate calculations.

Using appropriate diagrams, determine the possible conflict points on a four-leg signalized intersection for a two-phase system. Assume no turn on red.

Consider an SDOF system of mass m, stiffness k, and damping coefficient c. Now if the mass of the system increases 4 times, what will be the change in the damping ratio?

no changes

become half

increases by 2 times

increases by 4 times

Suppose you have to design a box in that has an expensive product in it, if the mass of the item 100 gm, there is some stuffing material in this box which providing some kind of flexibility to this item that is inside say 10N/m. Now if the box is lifted 3m above the ground to carry it from one place to another then what is the vertical dimension of the box

160 cm

165 cm

170 cm

175 cm

Assume water flow through a pipe with two sections. Assume the diameter is 6 and 9

inches. The velocity of water in the pipe in section A is 0, 932 and in section B is 1, 30 and

the Specific gravity is 0, 74 at section A. Determine the specific gravity at section B

24. Pick 5 numbers and compute the population standard deviationof the numbers

a. Add a nonzero constant c to each of your original numbers, and compute the standard deviation of this new population.

b. Use the results of part a and inductive reasoning to state what happens to the standard deviation of a population when a nonzero constant c is added to each data item.

25. Pick 6 numbers and compute the population standard deviation of the numbers

a. Double each of your original numbers and compute the standard deviation of this new population

b. Use the results of part a and inductive reasoning to state what happens to the standard deviation of a population when each data item is multiplied by a positive constant k.

Determine the surface area of the curb. Do not include the area of the ends in the calculation. 30 4 m 150 mm 150 mm 100 mm 150 mm

A mountain climber plans to buy some rope to use as lifeline. Which of the following would be the better choice? Explain your choice.

Rope A: Mean breaking strength:500lb; standard deviation of 100lb

Rope B: Mean breaking strength: 500lb; standard deviation of 10lb