Precise control of a triac to prevent high-frequency transients is called:
A) zero-voltage switching. B) pulse switch triggering.
C) microcontroller pulsing. D) negative feedback biasing.
A
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What size of a junction box must be used if there is one 4" conduit and two 3" conduits entering on one side of the box and exiting at a 90° angle on another side of the box? (Assume the conductor size is No. 4 AWG or larger.)
a. 30" b. 48" c. 56" d. 60"
Technician "A" says that a fusible link can be jumped out temporarily to allow the customer to get heat until the next business day. Technician "B" says that if the fuses keep on blowing on an electric duct heater, the fan may be defective. Which of the following statements is correct?
A. Technician "A" is correct. Technician "B" is correct. B. Technician "A" is correct. Technician "B" is incorrect. C. Technician "A" is incorrect. Technician "B" is correct. D. Technician "A" is incorrect. Technician "B" is incorrect.
Auxiliary views are named according to the ____.
A. section number of the drawing B. position from which the inclined face is seen C. size of the view D. shape of the surface
____________________ logic circuits are circuits that combine the basic components of AND gates, OR gates, and inverters to produce more sophisticated circuits.
Fill in the blank(s) with the appropriate word(s).