Basic Electricity-in HVAC Exam Study
Guide.
Alternating current (AC) - answercurrent that reverses its direction of flow periodically.
Reversals generally occur at regular intervals.
Ampere - answerThe amount of current required to flow through a resistance of one ohm with
a pressure of one vo...
Alternating current (AC) - answer✔current that reverses its direction of flow periodically.
Reversals generally occur at regular intervals.
Ampere - answer✔The amount of current required to flow through a resistance of one ohm with
a pressure of one volt, measured with an ammeter.
Atom - answer✔the smallest part of an element that contains all the properties of that element.
Compound - answer✔A substance that is a combination of atoms from at least two different
elements.
Conductor - answer✔A wire that is used for the path of electric flow. Most electric conductors
are copper or aluminum.
Current - answer✔Electrons flowing in an electric circuit, measured in amperes.
Direct current - answer✔An electron flow in only one direction; used in the industry only for
special applications such as solid-state modules and electronic air filters.
Electric energy - answer✔Energy that is produced by a movement of electrons. The energy can
be produced by chemical, light, thermal, or mechanical means.
Electric power - answer✔The rate at which electricity is being used, measured in watts.
Electric pressure - answer✔Another term used to refer to electromotive force, potential
difference, and voltage.
Electricity - answer✔Energy that is capable of producing and electron flow. An unbalanced
condition that results when an electron can be easily displaced from an atom.
Electrodes - answer✔The dissimilar metal conductors in a battery that produce a small difference
of potential.
Electrolyte - answer✔The chemical paste between the electrodes of a battery and some
capacitors.
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