Which HFC refrigerant has taken the place of R-12 for use in domestic refrigeration?
A. R-134a
B. R-404A
C. R-409A
D. R-410A
Answer: A
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In sketching, a slightly rounded pencil point is best because it is easy to control and does not break easily.
Answer the following statement true (T) or false (F)
In voltage-divider bias, the main ____ power supply voltage is divided among various resistors to turn on a transistor so that it’s ready for amplification.
a. AC b. DC c. input impedance d. output impedance
Most plywood panels are made up of sheets of veneer (thin pieces) called ____.
a.coatings c.corrugations b.laminates d.plies
Why does a starter motor use multiple armature segments?
A. To increase maximum rpm. B. To reduce current draw under load. C. To produce uniform constant torque. D. To maximize heat transfer from the rotor.