To obtain an accurate return-air temperature, what type of thermometer would a technician need to use to target the return-air grille?
A) Digital B) Glass-stem C) Dial D) Infrared
D
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?One carbon point equals ____ percent carbon.
A. ?.01 B. ?.1 C. ?1 D. ?10
Cables installed in or under metal-corrugated sheet roof decking are required to be installed and supported so there is not less than __________ measured from the lowest surface of the roof decking to the top of the cable or raceway.
Fill in the blank(s) with the appropriate word(s).
The conventional theory of electrical current flow states that current flows:
A. From positive to negative B. From negative to positive C. From low potential to high potential
The time constant for an inductor for each time period:
A) is a constant value. B) corresponds to a 37% of the decrease in value. C) corresponds to a 63% of the increase in value. D) all of these.