The resistance can be adjusted to permit the triac to fire when the AC waveform reaches its peak value. This will cause one-____ of the AC voltage to be dropped across the triac.
A. fifth
B. fourth
C. third
D. half
Answer: D
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A(n) ____________________ basic dimension applies where axes, center planes, or surfaces are shown coincident on a drawing, and geometric tolerances establish the relationship among the features or features of size.
Fill in the blank(s) with the appropriate word(s).
Circuit breakers that operate by heat are known as ____ circuit breakers.
a. fuse b. magnetic c. electrical d. thermal
The main operating principle of transformers is:
A) Transductive voltage amplification. B) Magnetic induction. C) Magnetic transformation. D) Transductive current amplification.
Electrical equipment such as switchboards, switchgear, panelboards, industrial control panels, meter socket enclosures, and motor control centers, that are in other than dwelling units, and are likely to require _____ while energized, shall be field or factory marked to warn qualified per-sons of potential electric arc-flash hazards.
What will be an ideal response?