Technician A says that carbon fiber driveshafts need support bearings every 24 inches. Technician B says that carbon fiber and aluminum driveshafts reduce rotating mass and are more efficient than steel driveshafts. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
B
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A structural CAD technician may be called upon to prepare drawings that provide an overall picture of a job for marketing purposes. What type of drawings would be suitable in presenting this overview?
A. Engineering drawings B. Shop drawings C. Production drawings D. Strategic drawings
When animals are weakened, their ____________________ systems do not function properly and the animals sicken more easily.
Fill in the blank(s) with the appropriate word(s).
Specimen plants are plants that are used alone for their own beauty or as an accent
Indicate whether the statement is true or false
PROBLEM 3.21 Two solid steel shafts are connected by the gears shown. A torque of magnitude T = 900 N ยท m is applied to shaft AB. Knowing that the allowable shearing stress is 50 MPa and considering only stresses due to twisting, determine the required diameter of (a) shaft AB, (b) shaft CD.
