A set of contacts are closed when the relay is energized. These contacts are classified as normally closed.
Answer the following statement true (T) or false (F)
False
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The ____ is typically the first access to the residence for guests.
A. patio B. garage C. foyer D. lobby
A ____ mine is used when a passageway is bored into a hill or mountain
A) drift B) shaft C) slope D) none of these
Which of the following statements about hydrogen is true?
A. A hydrogen atom is one proton and two electrons. B. Hydrogen is one of the heaviest elements known and is full of energy. C. Fossil fuels are combinations of carbon and hydrogen. D. Hydrogen is produced in a fuel cell when water is broken down into its basic elements.
Residential air filters that remove particulates from the air include fiberglass, pleated paper, and ____ precipitators.
A. electric B. hydrolic C. electrostatic D. hydrostatic