PROBLEM 3.148 A hollow cylindrical shaft was designed to have a uniform wall thickness of 0.1 in. Defective fabrication, however, resulted in the shaft having the cross section shown. Knowing that a 15-kip ? in. torque is applied to the shaft, determine the shearing stresses at points a and b.
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Using the following information, determine the ownership and operating costs for a hydraulic excavator.
Actual cost (delivered)—$172,600 Horsepower rating—245 hp Salvage value—$17,200 Useful life—8 years at 1,600 hours per year Total interest—6.5 percent per year Insurance—$2,589 per year Taxes—$3,020 per year Storage—$2,157 per year Fuel cost—$3.65 per gallon Fuel consumption rate—0.04 gallons per hp per hour Power utilization—60 percent Use factor—50 minutes per hour (83.33 percent) Lubrication—7 quarts of oil at $4.65 per quart Oiler labor—2.9 hours at $31.27 Lubrication schedule—every 150 hours Oil filter—$10.95 Grease—1 tube per 8 hour shift at $8.50 Air filter—$22.50 changed every 450 hours Repairs to equipment—75 percent over useful life
The tray located below the inlet feed line is called the:
a. mid section tray b. pumping section tray c. feed tray d. valve tray
The flux density is expressed either in teslas, gausses, or ____ per square inch.
a. webers b. lines c. maxwells d. wells
What is the length of a straight run segment in feet of an exhaust duct going from one seating area to another seating area if it measures 5 5/8" and if the scale on a blueprint is 3/16" = 1'?
Fill in the blank(s) with the appropriate word(s).