Problem 1.47 A load P is supported as shown by a steel pin that has been inserted in a short wooden member hanging from the ceiling. The ultimate strength of the wood used is 60 MPa in tension and 7.5 MPa in shear, while the ultimate strength of the steel is 145 MPa in shear. Knowing that b = 40 mm, c = 55 mm, and d = 12 mm, determine the load P if an overall factor of safety of 3.2 is desired.
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The frequency and thoroughness of motor maintenance and testing depends upon the number of hours and days the motor operates, the importance of the motor, and the _____.
a. horsepower rating b. overcurrent protection c. nature of service d. altitude at the motor location
Technician A says that CV joint grease with a gritty texture is contaminated. Technician B says that any visible crack in the CV boot indicates contaminated joint grease. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
An oscilloscope display is called a ________
A) Box B) Division C) Grid D) Graticule
Technician A says that the same stud welder can be used to attach pulling studs to steel and aluminum panels. Technician B says that aluminum requires a capacitor discharge welder to attach pulling studs. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B