Which of the following inscriptions on a wire connector indicates that it is designed for use on both copper and aluminum wire?
a. UL
b. CSA
c. AL-CU
d. AL-AL
c. AL-CU
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La cinta aislante más adecuada para ser utilizada como recubrimiento de protección en cables de alto voltaje es:
a. cinta de silicona de alta temperatura. b. cinta de caucho. c. cinta de fibra de vidrio. d. cinta de plástico vinílico.
(a) Obtain the voltage vo in the circuit of Fig. 2.127(a). (b) Determine the voltage v’o measured when a voltmeter with 6-k? internal resistance is connected as shown in Fig. 2.127(b). (c) The finite resistance of the meter introduces an error into the measurement. Calculate the percent error as  FIGURE 1.png)
(d) Find the percent error if the internal resistance were 36 k?.
 figure 2.png)
Liquid penetrant highlights flaws and reveals _____
a. surface cracks b. deep holes c. misalignment d. rust
Assume that the coupling between the motor and the inertial load of Problem 19.25 is flexible (e.g., a long shaft). This can be modeled by adding a torsional spring between the motor inertia and the load inertia. Now we can no longer lump together the two inertias and damping coefficients as if they were one; we need to write separate equations for the two inertias. In total, there will be three equations in this system: the motor electrical equation, the motor mechanical equation (Jm and Bm), and the load mechanical equation (J and B).
Find: The dynamic equations of the system and the transfer function from input voltage to load inertia speed. Assumptions: The energy conversion is ideal.