Which device produces electrical current resulting from heating of two dissimilar conductors?
A) Volt meter B) Ammeter C) Thermocouple D) None of these
C
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What is the wall thickness of 2" copper DWV?
Fill in the blank(s) with the appropriate word(s).
Which of the following is not part of the operating sequence of a natural-draft furnace?
a. The draft inducer starts on a call for heat. b. The controls prove that the pilot is lit. c. The gas valve energizes and opens. d. The fan switch starts the blower.
Diseases associated with mosquitoes include
A. Heartworm disease B. Viral disease (e.g., West Nile) C. Allergies D. All of the above E. A and B above
A short circuit is a conducting connection between _____.
a. ungrounded conductors b. ungrounded connectors and non-current carrying conductors c. grounded connectors and non-current carrying conductors d. any of the conductors of an electrical system