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

What cycle is the most efficient?

(A) Carnot (B) Brayton (C) Diesel (D) Otto

**Correct Answer: A**

You are tasked with identifying where the stress concentrations may appear on a support beam. Of the following locations which will not have a stress concentration? I Near concentrated loads II. Close to discontinuities of the beam III Where distributed loads occur.

(A) II & III (B) II (C) I & II (D) III

**Correct Answer: D**

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**

### More PE Exam Questions

- 1Using the Gibbs Phase Rule, how many intensive properties are required to fix a mixture of water and ammonia that is in a liquid state?
- 2A copper ball that is 1.5 m in diameter has a temperature of 100C. The environment is at 0C. If the emissivity of copper is 0.15 how much power is radiated by the copper ball?
- 3How much torque can be applied to a 6 inch outer diameter pipe that has a wall thickness of 0.25 inches when the maximum shear stress is 20,000 psi?
- 4
The magnitude(N) of the resultant of the three coplanar forces, A, B, and C, is most nearly:

- 5
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: