An 18 wheeler has a mass of 28,000 kilograms when fully loaded. The truck goes from 0 to 90 kilometers per hour in 120 seconds. What is the force on the 18 wheeler due to acceleration?
(A)1.08 kN
(B) 15.82 kN
(C) 10.71 kN
(D) 5.83 kN
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 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
How much heat is dissipated when a current of 15 amps passes through a 4 ohm resistor?
（A）3,075 btuh （B） 900 btuh （C） 2,700 btuh （D） 9,300 btuh
Correct Answer: A
More PE Exam Questions
- 1What is the elongation of a 2 meter aluminum bar when it has been stressed to 512 MPa? (E = 69 GPa)?
- 2
The magnitude(N) of the resultant of the three coplanar forces, A, B, and C, is most nearly:
- 3What is the thermal efficiency for a Carnot engine that operates between 100F and 400K?
- 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?
- 5What is the hydraulic diameter of a 20 inch diameter pipe that is half full?