High resistance in a circuit can cause ________
A) Clicking of relays or solenoids B) Dim lights
C) Slow motor operation D) Any of the above
D
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If more current is flowing out of the battery than the alternator, it is said to be ____________________.
Fill in the blank(s) with the appropriate word(s).
The high-temperature limit switch mounted above or beside the heat exchanger of a gas furnace should cycle open if _____.
a. a flame rollout occurs b. the indoor temperature exceeds 75°F c. there is too much combustion air d. the indoor blower fails to operate
Why are air acetylene, air map, or air propane torches preferred over oxyacetylene torches for soldering copper pipes?
A) They have smaller, more focused flames than oxyacetylene torches. B) Oxyacetylene temperatures can easily overheat the pipe. C) They all produce a much hotter flame than oxyacetylene torches. D) Oxyacetylene torches cannot be used with solder because of the possibility of adverse chemical reactions.
The logic gate that generates a HIGH (1 ) output when any one of its inputs is HIGH is the:
A) OR gate. B) NOR gate. C) AND gate. D) NOT operation.