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What is the oxidation state of Carbon in Carbonate (CO3-2)

(A) -2

(B) 4

(C) 1

(D) 2

The Correct Answer
Explanation

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

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