PROBLEM 2.47 The assembly shown consists of an aluminum shell (Ea = 70 GPa, ?a = 23.6 ? 10–6/?C) fully bonded to a steel core (Es = 200 GPa, ?s = 11.7 ? 10–6/?C) and the assembly is unstressed at a temperature of 20?C. Considering only axial deformations, determine the stress in the aluminum when the temperature reaches 180?C.
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When operating the motor ____ speed, the armature voltage is reduced accordingly.
a. at base b. below base c. much above d. above base
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Which of the following is TRUE?
A. All states require safety inspections of vehicles B. OSHA certifies technicians to be qualified to work on vehicles C. AAA Approved Auto Repair is a network of service facilities that have meet AAA standards D. ASE certification is required to legally repair vehicles
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Guinea pigs have short furry ears
Indicate whether the statement is true or false
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Residual product in the area can be a significant ____ if you are making a repair on a leaky pipe.?
A. fire hazard? B. environmental concern? C. respiratory problem? D. waste material?
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