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Electricity For HVAC Questions And Answers With Verified Solutions Already Passed!!!
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Electricity For HVAC Questions And Answers With Verified Solutions Already Passed!!!
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Electricity For HVAC Questions AndAnswers With Verified Solutions Already
Passed!!!
What does NEC stand for?
ANSWER: National Electric Code
The NEC is a set of regulations for electrical installations in the United States,
ensuring safety and proper operation of electrical systems.
What is Ampacity?
ANSWER: The current carrying capacity of wire or cable expressed in amperes or
amps.
Ampacity refers to the maximum amount of electric current a conductor or device
can carry before sustaining immediate or progressive damage.
What is EMF?
ANSWER: Electromotive Force (volts)
EMF is the voltage generated by a source such as a battery or by electromagnetic
induction.
What is Amperage?
ANSWER: The measurement of electrical flow in a conductor.
Amperage refers to the quantity of electrons flowing in a circuit.
You check volts in parallel or series?
ANSWER: Parallel
Voltage is measured across components, which is done in parallel.
You check amps in parallel or series?
ANSWER: Series
Amperage is measured in series because current flows through each component
one after the other.
,What is Voltage?
ANSWER: The difference in potential force between two points. Most often
called Electromotive Force (EMF).
Voltage is the force that pushes electric charges to move in a circuit.
Resistance is measured in _____.
ANSWER: Ohms
The unit of resistance, symbolized by Ω (omega), represents how much a material
opposes the flow of current.
Current is measured in ______.
ANSWER: Amps
Current is the flow of electric charge, measured in amperes (amps).
Amps are indicated by what letter?
ANSWER: A or I
The symbol for amperes (amps) can be denoted by "A" or "I" in formulas.
Resistance is indicated by what letter?
ANSWER: R
Resistance is commonly denoted by the letter "R" in formulas.
Voltage is indicated by what letter?
ANSWER: E or V
Voltage is denoted by the letters "E" or "V," with "V" being the most common.
Good conductors have ______ resistance.
ANSWER: Low
Good conductors, such as copper, have low resistance, allowing current to flow
easily.
,Poor conductors or insulators have _______ resistance.
ANSWER: High
Insulators have high resistance, which prevents or limits the flow of electric
current.
A device that uses power is referred to as a _____?
ANSWER: Load
A load is any component or device that consumes electrical energy to do work,
such as a motor or light bulb.
Controls can be either _____ or _____.
ANSWER: Operators, Safeties
Controls can either be operator-initiated (e.g., switches) or safety devices (e.g.,
fuses, circuit breakers).
Provides a path for current to flow.
ANSWER: Conductors
Conductors, typically made from materials like copper or aluminum, allow current
to flow through an electrical circuit.
Disconnect power to measure _______.
ANSWER: Ohms
When measuring resistance (ohms), you must disconnect the power to ensure an
accurate reading and avoid damage to the meter.
Voltage is divided between each load in a _____ circuit.
ANSWER: Series
In a series circuit, voltage is divided across each component.
, Voltage is the same to each load in a _____ circuit.
ANSWER: Parallel
In a parallel circuit, each component receives the same voltage.
Matter is made up of _____.
ANSWER: Atoms
All matter is composed of atoms, which are the smallest unit of an element.
Like charges _______ each other.
ANSWER: Repel
According to Coulomb's Law, like charges (positive-positive or negative-negative)
repel each othe
Opposite charges ________ each other. - ANSWER✔✔ attract
Electrons moving down a conductor are referred to as _____ electrons. -
ANSWER✔✔ free
What are examples of good conductors: - ANSWER✔✔ gold, silver, copper,
aluminum
Magnets have lines of force that are called _______. - ANSWER✔✔ magnetic flux
_____ current travels in one direction. - ANSWER✔✔ Direct
_____ current flows from negative pole to positive pole. - ANSWER✔✔ Direct
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