Which of these terms is a measure of the actual on-time measured in milliseconds?
A) Pulse width B) Period C) Amplitude D) Frequency
A
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List the four equations used to develop x-bar and r-bar charts.
What will be an ideal response?
Fill in the blank(s) with the appropriate word(s).
How can a technician determine a major component failure on a mid-efficiency furnace?
A) The technician must examine each component to ensure it is operating properly. B) The unit owner must accurately describe how the unit is operating to diagnose component failure. C) The technician can use the self-testing feature on the control box. D) The technician can send the control box in to the manufacturer.
For which fault types will there be a zero sequence current that is non-zero:
A. 3 phase, L-L, SLG, DLG B. L-L, SLG, DLG C. SLG, DLG D. 3 phase, L-L