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Midterm HVAC Electrical Questions Answered Correctly –| Latest Version 2024/2025
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Midterm HVAC Electrical Questions Answered Correctly –| Latest Version 2024/2025
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Midterm HVAC Electrical Questions Answered Correctly –|Latest Version 2024/2025
•
_____ are the particles that orbit the core of an atom - ANSWER electrons
______ is the force that pushes free electrons through conductors - ANSWER
voltage
name 3 terms meaning voltage - ANSWER electromotive force (emf) potential
difference and eletrical pressure
a device used to generate electricity is called a - ANSWER voltage source
name 6 voltage sources - ANSWER battery, generator, solar cell, thermocouple,
alternator, transformer secondary
is voltage current? - ANSWER no
electric current is ________ flowing through a conductor - ANSWER electrons
_______ is the measurement of current flow - ANSWER amperage
amperage tells the _____ of electrons moving thru a conductor - ANSWER amount
what device is used to check amperage? - ANSWER ammeter
conductors provide a ____ for current - ANSWER path
a circut with a complete path for current is said to have ________ - ANSWER
continuity
do wires have continuity? - ANSWER yes
_______ _______ reverses direction at regular intervals - ANSWER alternating
current
current alternates (reverses direction) two times every _____ - ANSWER cycle
, ac in the usa flows at 60 cycles per _____ , which means the same as 60 _____ -
ANSWER seconds, hertz
__________ is the opposition to current flow - ANSWER resistance
resistance reduces the ______of electrons flowing thru a circuit - ANSWER
amount
amperage will be high through a circuit that has ___ resistance - ANSWER low
name 2 types of resistance - ANSWER resistive, reactive
counter e.m.f. is a type of _______ resistance - ANSWER reactive
counter e.m.f. is produced by ________ in motion - ANSWER magnetism
name 5 factors that affect the resistance of a device - ANSWER material length
girth temperature and magnetism in motion
the resistance of an open circuit will be _______ ohms - ANSWER infinite
the resistance across a closed switch or wite should be ____ ohms - ANSWER
zero
all loads have __________ - ANSWER resistance
name 6 loads - ANSWER lamp heater motor relay coul solenoid coul transformer
primary
resistive loads generate ____ and or _____ - ANSWER heat , light
inductive loads generate ___________ - ANSWER electromagnetism
name 4 inducitve loads - ANSWER motor relay coil solenoid coil transformer
primary
ohms law states 1____ will push 1 ___ through 1 ___ - ANSWER volt, amp, ohm
ohms law formula is - ANSWER e = i x R
if resistance does not change and voltage increases amperage will ______ -
ANSWER increase
if resistance does not change and voltage doubles amperage would ______ -
ANSWER double
if voltage does not change and resistance decreases amperage will _______ -
ANSWER increase
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