When the base of an NPN transistor is more negative than the emitter, it is
A) shorted. B) OFF. C) ON. D) cannot tell.
B
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La ubicación normal para proporcionar protección contra sobrecorriente en un circuito eléctrico es:
a. en el tomacorriente. b. donde el conductor recibe el suministro. c. donde finaliza el conductor. d. en el último punto del circuito.
If you find a walk-in freezer coil completely frozen up what is the first thing to do?
a. Check system temperatures and pressures to see if it is a refrigeration problem. b. Clear all ice off the evaporator before checking the refrigeration system. c. Run the unit into defrost to see if a defrost component is the problem.
The dam's family is listed at the top of a pedigree; the sire's family is listed at the bottom
A. True B. False
A compound gauge ____.
A. indicates pressures above 14.696 psia B. indicates pressures in inches Hg below atmospheric pressure C. is one of two gauges on a typical gauge manifold D. all of the above