PROBLEM 3.7 The solid spindle AB is made of a steel with an allowable shearing stress of 12 ksi, and sleeve CD is made of a brass with an allowable shearing stress of 7 ksi. Determine (a) the largest torque T that can be applied at A if the allowable shearing stress is not to be exceeded in sleeve CD, (b) the corresponding required value of the diameter of spindle AB.
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Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW (three-phase) at unity (1.0) p.f. The line impedance is 0 + 1j ohms per phase between generator G1 and the load, and 0 + 2j ohms per phase between generator G2 and the load. If generator G1 supplies 15 kW (three-phase) at unity p.f., with a terminal voltage of 460 V line-to-line, determine:
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