Heat Exchanger TS#3
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The center-to-center spacings of framing members in a WLF building are generally
A) 12 in., 24 in., or 36 in. B) 12 in., 16 in., or 24 in. C) 4 ft, 6 ft, or 8 ft. D) 2 ft, 3 ft, or 4 ft. E) Virtually any spacing may be used, depending on the architectural and structural considerations.
Technician A says that using final drives allows other drivetrain components to be lighter and less bulky. Technician B says that using a final drive allows the powertrain to drop the power flow closer to the ground. Who is correct?
A. Technician A B. Technician B C. Both D. Neither
Someone suggests that the lifetime T(in days) of a certain component can be modeled with the Weibull distribution with parameters ?= 3 and ?= 0.01.
a. If this model is correct, what is P(T ?1)? b. Based on the answer to part (a), if the model is correct, would one day be an unusually short lifetime? Explain. c. If you observed a component that lasted one day, would you find this model to be plausible? Explain. d. If this model is correct, what is P(T ? 90)? e. Based on the answer to part (d), if the model is correct, would 90 days be an unusually short lifetime? An unusually long lifetime? Explain. f. If you observed a component that lasted 90 days, would you find this model to be plausible? Explain.
Answer the following statement(s) true (T) or false (F)
1. the noise from a defective rear drive pinion bearing may produce a high pitched whistling or whining sound that changes with driving mode (on or off the gas pedal) 2. In a differential with a gear ratio of 4:1, the drive pinion would revolve four times to cause the ring gear to rotate once. 3. the positive traction differential is designed to resist the tendency of one drive wheel to rotate without the other. 4. a non-hunting ring and pinion gear will have the same teeth on the pinion touch the same teeth on the ring gear each revolution. 5. Backlash is the amount of movement between the tooth contact of two gears in mesh.