La coordinación selectiva garantiza que:
a. sólo queda fuera de servicio la parte del sistema que ha fallado.
b. el sistema entero queda fuera de servicio cuando se detecta un fallo.
c. el fusible de servicio principal tiene el tiempo de apertura más corto.
d. el dispositivo contra sobrecorriente del alimentador elimina un fallo en un circuito
derivado.
a. sólo queda fuera de servicio la parte del sistema que ha fallado.
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A random sample of 150 students attending Iowa State University has a mean age of 20.3 years and a standard deviation of 1.2 years, while a random sample of 110 students attending the University of Iowa has a mean age of 21.1 years and a standard deviation of 1.5 years. Discuss whether we can conclude that the average age of students at the two universities are not the same. (Calculations not required.)
What will be an ideal response?
Which of the following is the least likely to cause an engine noise?
A) Cracked exhaust manifold B) Loose accessory drive belt C) Vacuum leak D) Carbon on the pistons
The difference between brazing and soldering is that:
A) Brazing melts the base metal and soldering does not. B) Soldering occurs at higher temperatures than brazing. C) Brazing never requires flux. D) Brazing occurs at higher temperatures than soldering.
A truck is placed on alignment turntables with the wheels in the straight ahead position. After removing the pins and zeroing the protractor scales, the wheels are turned all the way left until they contact the turn stop. How will the protractor scale read?
A. right turn angle exceeds the left B. left turn angle exceeds the right C. both turn angles should be equal