De los siguientes motores, un motor _____ es la MEJOR elección de instalación para una aplicación que necesita velocidades ajustables.
a. de CC
b. de fase partida
c. sincrónico
d. de arranque con condensador
a. de CC
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One of the minor differences between troubleshooting a geothermal heat pump and an air-to-air heat pump is how to gain access to pressures and temperatures in the water or ground loop.
Answer the following statement true (T) or false (F)
(a) Some martensitic transformations are completely reversible, however, there may be a large difference in the size of the hysteresis loop that couples a complete temperature induced cycle. Explain why, in some cases, the size of the hysteresis is large and in others it is small.
(b) The martensite transformation in steel is normally not reversible. Rationalize this fact.
The finish nails used to fasten a riser to each stringer should be _____
a. 4d b. 6d c. 8d d. 10d
A typical value of input bias current for an op-amp is around 80 nA
Indicate whether the statement is true or false