Engineering Answers

A project has a life of 10 years, and no salvage value. The firm uses an interest rate of 12% to evaluate

engineering projects. The project has an uncertain first cost and net revenue.

What is the joint probability distribution for first cost and net revenue?

A road between Fairbanks and Nome, Alaska, will have a most likely construction cost of $4 million per

mile. Doubling this cost is considered to have a probability of 30%, and cutting it by 25% is considered

to have a probability of 10%. The state’s interest rate is 8%, and the road should last 40 years. What is

the probability distribution of the equivalent annual construction cost per mile?

Q3. “There is a mechanism in which CPU relinquishes the control over the buses for carrying out various operations between memory unit and I/O unit.”Justify your answer and explain such process in detail with the help of suitable diagram.

A tank initially contains 50 gal of fresh water. At t = 0, brine solution containing 2 lb of salt per gallon is poured into the tank at the rate of 12 gal/min, while the well stirred mixture leaves the tank at the rate of 8 gal/min. What is the amount of the salt at the end of minutes? How long it will take to obtain an amount of 50 lb?

An object has a mass of 2 kg is dropped from the top of building 30 meters tall. The initial velocity is zero. As it falls, the object encounters air resistance that is equal to 1/3 v. What is the velocity and altitude of the object after 1.5 seconds?

Write a program which prints the name and lawyer of each client whose age is L or higher.

(L is age variable) 

A company just purchased an intelligent robot, which has a first cost of $80,000. Since the robot is

unique in its capabilities, the company expects to be able to sell it in 4 years for $95,000. (a) If the

company spends $10,000 per year in maintenance and operation of the robot, what will the company’s

MACRS depreciation charge be in year 2? Assume the recovery period for robots is 5 years and the

company’s MARR is 16% per year when the inflation rate is 9% per year. (b) Determine the book value

of the robot at the end of year 2.

A video recording system was purchased 3 years ago at a cost of $30,000. A 5-year recovery period

and DDB depreciation have been used to write off the basis. The system is to be replaced this year with

a trade-in value of $5000. What is the difference between the book value and the trade-in value?

Equipment for immersion cooling of electronic components has an installed value of $182,000 with an

estimated trade-in value of $40,000 after 15 years. For years 2 and 10, use DDB book depreciation to

determine (a) the depreciation charge and (b) the book value.

Pneumatics Engineering purchased a machine that had a first cost of $40,000, an expected useful life

of 8 years, a recovery period of 10 years, and a salvage value of $10,000. The operating cost of the

machine is expected to be $15,000 per year. The inflation rate is 6% per year and the company’s MARR

is 11% per year. Determine (a) the depreciation charge for year 3, (b) the present worth of the third-

year depreciation charge in year 0, the time of asset purchase, and (c) the book value for year 3

according to the straight line method.