What is the oxidation state of Carbon in Carbonate (CO3-2)
(A) -2
(B) 4
(C) 1
(D) 2
A 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?
(A) 6 w (B) 5,264 W (C) 500 W (D) 1,164 W
Correct Answer: D
Reactions on average will proceed faster at a higher temperature because of which of the following?
(A) There is less energy in the molecules (B) Molecules collide more frequently (C) The amount of exergy is diminished (D) The energy to start the reaction is higher
Correct Answer: B
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:
(A) A and C, $170 (B) B and D, $170 (C) A and C, $234 (D) B and D, $234
Correct Answer: B
More PE Exam Questions
- 1
The following data have been collected:
Which of the following statements is true?
- 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?
- 3Which of the following can not be equal to 1 mol of the substance at standard conditions?
- 4How 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?
- 5Which of the following statements is FALSE when concerning the hot working of metal?