What is the standard equation for calculating the future worth (F) when
given the annual rate of return (I) and the present rate (P)?

(A) $latex F=P(1+i)^{n-1}$

(B) $latex F=P(1+i)^n$

(C) $latex F=P(1-i)^n$

(D) $latex F=P(1+n)^I$

What is the thermal efficiency for a Carnot engine that operates between 100F and 400K?

(A) 75% (B) 77.5% (C) 7.8% (D) 22.3%

**Correct Answer: D**

Find the slope of the line defined by: $latex y=2x^5 + 3x^4 + 2x^2 + 3x + 1$

（A）$latex m = 2x^6 + 3x^4 + 2x^3 + 3$ （B） $latex m = 10x + 12x^2 + 4x^4 + 3$ （C） $latex m = 10x^5 + 12x^4 + 4x^2 + 3$ （D） $latex m = 10x^4 + 12x^3 + 4x + 3$

**Correct Answer: D**

You must choose between four pieces of comparable equipment based on the costs and salvage values given below. All four pieces have a life of 8 years.

The discount rate is 12%. Ignore taxes. The two most preferable projects and the approximate difference between their present worth values based on least cost are:

(A) A and C, $170 (B) B and D, $170 (C) A and C, $234 (D) B and D, $234

**Correct Answer: B**

### More PE Exam Questions

- 1What cycle is the most efficient?
- 2A group of dog pulls a sled across a snow covered surface. It takes 5 hours to pull the 200 kg sled 100 kilometers. If the static friction is 0.4 and the dynamic friction is 0.1 what is the average power exerted by the dog sled team?
- 3What the standard units used when using the Reynolds Number?
- 4Which of the following can not be equal to 1 mol of the substance at standard conditions?
- 5What would the annuity be over a 20 year period that has an interest rate of 10% and a present worth of $500?