If a process is considered to be internally reversible and adiabatic, what can the change in entropy be assumed to be?

(A) Entropy becomes Infinite

(B) Entropy increases

(C) Entropy decreases

(D) Entropy does not change

An iron sphere with a mass of 1.5 kg hangs from a 15 cm long spring. If the spring constant is 0.75 N/m what is the period of oscillation when the sphere is pulled down and released?

(A) 3.2 s (B) 8.9 s (C) 4.4 s (D) 12.5 s

**Correct Answer: B**

What would the annuity be over a 20 year period that has an interest rate of 10% and a present worth of $500?

(A) $58.75 (B) $42.55 (C) $8.51 (D) $ 63.75

**Correct Answer: A**

An 18 wheeler has a mass of 28,000 kilograms when fully loaded. The truck goes from 0 to 90 kilometers per hour in 120 seconds. What is the force on the 18 wheeler due to acceleration?

（A）1.08 kN （B） 15.82 kN （C） 10.71 kN （D） 5.83 kN

**Correct Answer: D**

### More PE Exam Questions

- 1A plane intercepts the coordinate axis at (4,6,10). What are the Miller indices for this plane?
- 2What is the hydraulic diameter of a 20 inch diameter pipe that is half full?
- 3What is the elongation of a 2 meter aluminum bar when it has been stressed to 512 MPa? (E = 69 GPa)?
- 4What would the annuity be over a 20 year period that has an interest rate of 10% and a present worth of $500?
- 5Find the slope of the line defined by: $latex y=2x^5 + 3x^4 + 2x^2 + 3x + 1$