What is the oxidation state of Carbon in Carbonate (CO_{3}^{-2})

(A) -2

(B) 4

(C) 1

(D) 2

What is the hydraulic diameter of a 20 inch diameter pipe that is half full?

(A) 10 inches (B) 2.5 inches (C) 20 inches (D) 5 inches

**Correct Answer: D**

How 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?

（A）23,400 in lbs （B） 250,000 in lbs （C） 37,400 in lbs （D） 30,000 in lbs

**Correct Answer: B**

A heavy roller is held in equilibrium on a frictionless Plane AB by the force F, as shown. Which diagram correctly shows a vector polygon of the forces acting on the roller?

(A) Option A

(B) Option B

(C) Option C

(D) Option D

**Correct Answer: C**

### More PE Exam Questions

- 1
A company can manufacture a product using hand tools. Tools will cost $1,000, and the manufacturing cost per unit will be $1.50. As an alternative, an automated system will cost $15,000 with a manufacturing cost per unit of $0.50. With an anticipated annual volume of 5,000 units and neglecting interest, the break-even point (years) is most nearly:

- 2What would the annuity be over a 20 year period that has an interest rate of 10% and a present worth of $500?
- 3A plane intercepts the coordinate axis at (4,6,10). What are the Miller indices for this plane?
- 4Which of the following is FALSE with regards to creep I. May involve the sliding of whole grains II At high stresses creep is controlled by the movement of vacancies. III Also known as hot flow IV Creep is a time dependent deformation
- 5How 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?