A spaceship leaves the space station with an acceleration of 15 ft/s2. After 3 minutes the engines turn off and the acceleration is 0 ft/s2. What is the average velocity of the spaceship?
(A)81,100 ft/s
(B) 1,350 ft/s
(C) 243,000 ft/s
(D) 2,700 ft/s
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
What is the elongation of a 2 meter aluminum bar when it has been stressed to 512 MPa? (E = 69 GPa)?
(A) 1.5 cm (B) 2.0 cm (C) 1.0 cm (D) 1.7 cm
Correct Answer: A
What is the thermal efficiency for a Carnot engine that operates between 100F and 400K?
(A) 75% (B) 77.5% (C) 7.8% (D) 22.3%
Correct Answer: D
More PE Exam Questions
- 1What is the natural frequency of a body that has a period of oscillation of 2.7 seconds?
- 2
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?
- 3What is the hydraulic diameter of a 20 inch diameter pipe that is half full?
- 4Your credit card has a nominal interest rate of 18%. If the interest is calculated monthly, what is the effective annual rate?
- 5
What is the oxidation state of Carbon in Carbonate (CO3-2)