What cycle is the most efficient?
(A) Carnot
(B) Brayton
(C) Diesel
(D) Otto
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
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:
(A) 2.0 (B) 2.8 (C) 3.6 (D) 15.0
Correct Answer: B
What is the gauge pressure of at a point that is 15 meters below the surface of water that has an atmospheric pressure of 14.7 PSIA?
（A）147,150 pa （B） 150,000 pa （C） 147,250 pa （D） 147,000 pa
Correct Answer: A
More PE Exam Questions
- 1
A piston inside a cylinder undergoes an isentropic compression with the following values.
$latex p_1= 4.57 \frac{N}{cm^2}$$latex p_2= 34.07 \frac{N}{cm^2}$
$latex V_1 = 257 cm^3$
If the specific heat ratio (k) is 1.4, What is the compressed volume? - 2How 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?
- 3
The magnitude(N) of the resultant of the three coplanar forces, A, B, and C, is most nearly:
- 4Using the Gibbs Phase Rule, how many intensive properties are required to fix a mixture of water and ammonia that is in a liquid state?
- 5
If a process is considered to be internally reversible and adiabatic, what can the change in entropy be assumed to be?