oliverlehmann test


Hello friends,

Can anybody help me in solving the following questions.of  http://www.oliverlehmann.com/pmp-self-test/75-free-questions.htm.


Thanking in Advance


A company has to make a choice between two projects, because the available resources in money and kind are not sufficient to run both at the same time. Each project would take 9 months and would cost $250,000.
The first project is a process optimization which would result in a cost reduction of $120,000 per year. This benefit would be achieved immediately after the end of the project.
The second project would be the development of a new product which could produce the following net profits after the end of the project:
1. year:        $  15,000
2. year:  $  125,000
3. year:  $  220,000

Assumed is a discount rate of 5% per year. Looking at the present values of the benefits of these projects in the first 3 years, what is true?
 2) Both projects are equally attractive.
  The first project is more attractive by app. 7%.
  The second project is more attractive by app. 5%.
  The first project is more attractive by app. 3%.

.  A project manager needs a certain number of identical valve housings for a power station project.
He starts with 100 raw items which are made as metal castings. Out of this batch, 15 are found leaking from micro-porosities in a subsequent pressure test. 6 of these housings can be recovered by a special sealing process for raw castings.

The 91 housings are then being machined. After this process step 10 machined castings are found leaking. 3 of these items can also be saved using another sealing process for machined castings.

The remaining 84 housings are getting mounted to the power plant pipe work. During a pressure test after this process step it is found that 12 valves are leaking. Out of these a number of 6 valves can be saved by replacing the sealing rings used.

Finally the project manager has 78 valves which he can use. What is true?
  RTY = 0.84
  RTY = 0.78
  RTY = 0.91
  RTY = 0.65

3)   A prime contractor in a customer project under CPFF contract has run into unexpected technical problems. Fixing them will require a lot of additional work to be done.

The company made a decision to book more staff and equipment from their subcontractors in order to adhere to the agreed timeline. The customer agreed to this decision.

What will most likely happen?
  The contractor‘s indirect costs will increase and the customer‘s payment for them will increase, too.
  The contractor‘s indirect costs will increase but the customer‘s payment for them will not increase.
  The contractor‘s indirect costs will not increase but the customer‘s payment for them will.
  Neither the contractor's indirect costs nor the customer‘s payment for them will increase.

Question Number : 31 .

Please help me to understand FF-2


57.  Which of the following is true in regard to the Code of Accounts?
  It allows one to easily identify the breakdown level of the item in the resource structure.
  It describes the coding structure used by the performing organization to report financial information in its general ledger.
  It is the collection of unique identifiers generally assigned to WBS items.
  It defines ethical behavior in the project and the responsibilities to the customer and the profession.



Appreciate your help

Source : http://www.six-sigma-material.com/Final-Yield.html
Here is the Method to Calculate the RTY ( wichi is a calucaltion under 6 Sigma)
Process 1 :
(ThroughPutYeild) TYP1 => 100 - 15 (out of process or damaged)=85; 85/100; 0.85
Process 2:
TPY2 : 91-10=81;81/91;0.89
Process 3:
TPY3 : 84-12=72;72/84;0.85
Rolled Throughput Yeild (RTY)= TPY1 * TPY2 * TPY3 = 0.85*0.89*0.85 = 0.643025 = 0.65 (Rounded) is the answer

Hope this helps.

Code of Accounts " Any Numbering system used to uniquely identify each component of the WBS"

Source : PMBoK P429 (Glossary)


Can any one help on other questions..

For this question note each project yields 360K.

The only difference is the first project yields profit faster. 

If you add interest for the money earned each year you get something less than 1% since .05 times 120K is 6K and this repeats each of the three years for about 36K total.

The second project makes money slower.  The closed answer is 3%.  I suppose I am missing something since 3% is far from less than 1%.

You can solve my inspection.

If anyone has more precise caluction yielding 3% I would love to see it.