A tube that is 10 feet long and 2 feet in diameter is placed in an air
stream. The flow of the air is at a speed of 15 ft/s and is
perpendicular to the long axis of the tube. If the coefficient of drag
is 1.3 and the density of air is 0.075 lbm/ft3 What is the drag on the cylinder?
(A) 150 lbf
(B) 200 lbf
(C) 320 lbf
(D) 220 lbf
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
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
Correct Answer: D
Which of the following statements is FALSE when concerning the hot working of metal?
(A) Produce a fine grained product (B) Removes strain hardening (C) Combines of annealing and cold working (D) Decreases the density of the metal
Correct Answer: D
More PE Exam Questions
- 1What is the hydraulic diameter of a 20 inch diameter pipe that is half full?
- 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?
- 3
The following data have been collected:
Which of the following statements is true?
- 4An 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?
- 5What would the annuity be over a 20 year period that has an interest rate of 10% and a present worth of $500?