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
What the standard units used when using the Reynolds Number?
(A) ft/s2 (B) centipoise (C) kg/s (D) None
Correct Answer: D
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
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
More PE Exam Questions
- 1What is the natural frequency of a body that has a period of oscillation of 2.7 seconds?
- 2
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:
- 3
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:
- 4
What is the oxidation state of Carbon in Carbonate (CO3-2)
- 5Which 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