Grounding of a welding machine usually involves _____
a. setting it on bare earth
b. plugging it in to a three-prong receptacle
c. plugging it in to a ground fault circuit interrupter
d. connecting the machine?s ground terminal to a known ground source
d
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?How does water's flow velocity vary across a pipe's diameter?
A. ?remains constant across the diameter B. ?faster near the center of the pipe, and slower near the edges C. ?slower near the center of the pipe, and faster near the edges D. ?slower near the top surface, gradually increasing toward the bottom surface
Technician A says a pyrotechnic-type retractor prevents the belt from coming out of the retractor when there is a sudden pull on the belt. Technician B says an inertia lock retractor uses an explosive charge to quickly tighten the belt at the start of a crash.
a. A only
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c. both A and B
d. neither A nor B
The feedback resistor of a three-input averaging summing amplifier is 50 k?. What are the values of R?, R?, and R??
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