The solid-state relay ________
A) uses an LED to receive a signal and a transistor to switch current
B) uses a transistor to receive a signal and an IC to switch current
C) uses a capacitor to receive a signal and an IC to switch current
A
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The use of an MPPT and/or step down charge controller in a stand-alone PV system requires the array to be sized a little differently than when using a(n) ____________________ charge controller.
Fill in the blank(s) with the appropriate word(s).
To lower and narrow a valve seat that has been cut at a 45-degree angle, use a cutter or stone of what angle?
A) 60 degrees B) 15 degrees C) 45 degrees D) 30 degrees
The lower the Ra of a rotor, the ________ the surface
A) Higher B) Smoother C) Lower D) Rougher
What are the three most common ways to reduce pollutants in indoor air?
A) Source removal, ventilation, and filtration B) HEPA filters, UV lights, and ozone generators C) HEPA filters, electronic air cleaners, and UV lights D) Creating a negative building pressure, filtration, and ventilation