A 500 k? potentiometer is connected across a 5 V source. If the voltage from the wiper to the lower end of the potentiometer is 1.2 V, what is the resistance of that lower part?
A) 0 ? B) 380 k? C) 120 k? D) 500 k?
C
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A three-phase induction motor may have _____.
a. 1 pole b. 2 poles c. 5 poles d. 7 poles
Cuando se monten en pared unas bandejas portacables, asegúrese de que:
a. la estructura del edificio es suficientemente fuerte para soportar el sistema de bandeja. b. también se utiliza soporte de trapecio. c. también se utiliza suspensión con varilla directa. d. solo se utiliza bandeja no metálica.
A condition in which wet concrete escapes from a form is called a(n) _____.
a. blockout b. abutment c. blowout d. slabout
Which of the following statements about sizing the equipment grounding conductors is true?
A. They are sized from Table 250.122 in accordance with the rating of the overcurrent device. B. They are of the same size as for the branch-circuit or feeder conductors. C. They are sized from Table 250.66 in accordance with the rating of the overcurrent device. D. They are sized in accordance with the rating of the running overload protection for continuous duty motors.