HVAC NATE HEAT PUMP verified A+ questions and
answers.
Terms in this set (162)
voltage is electrical pressure
current flow must have a power source, path, and load
ohms law E=IxR
, inductive electricity is Anything that moves, motors, solenoid
resistive current is a heater coil
DC current flows in one direction
voltage from a battery can be pressure from a water pump
compared to
transformers are rated in volt amps
a 24 volt, 40 volt amps 1.6666 amps
transformer is rated for
motors are grounded to take away voltage potential
ladder diagrams are useful for troubleshooting
low voltage wiring is normally color coded
to change the rotation of a reverse the connection of any two terminals
three phase motor
pictorial wiring diagrams approximate position in the equipment
generally show components in
their
power is measured in watts
volt meters read a potential parallel across the load
difference and the leads are
placed
5 horsepower motors are 240/460 r belt driven
larger and typically
changing fan speeds will CFMs on a properly loaded motor
change the
when checking windings on an volts
energized compressor, your
meter will be in
de-energized compressor will ohms
be in
if you read voltage across a they are burnt or pitted
relay or contactor that is
energized
the first checks on a control input signals and output voltages
board are
a continuity check shows zero ohms or some specific reading
continuity by reading
alternating current has current reverses direction as the voltage goes through a positive/negative
flow that change
one pound of water is about one pint
answers.
Terms in this set (162)
voltage is electrical pressure
current flow must have a power source, path, and load
ohms law E=IxR
, inductive electricity is Anything that moves, motors, solenoid
resistive current is a heater coil
DC current flows in one direction
voltage from a battery can be pressure from a water pump
compared to
transformers are rated in volt amps
a 24 volt, 40 volt amps 1.6666 amps
transformer is rated for
motors are grounded to take away voltage potential
ladder diagrams are useful for troubleshooting
low voltage wiring is normally color coded
to change the rotation of a reverse the connection of any two terminals
three phase motor
pictorial wiring diagrams approximate position in the equipment
generally show components in
their
power is measured in watts
volt meters read a potential parallel across the load
difference and the leads are
placed
5 horsepower motors are 240/460 r belt driven
larger and typically
changing fan speeds will CFMs on a properly loaded motor
change the
when checking windings on an volts
energized compressor, your
meter will be in
de-energized compressor will ohms
be in
if you read voltage across a they are burnt or pitted
relay or contactor that is
energized
the first checks on a control input signals and output voltages
board are
a continuity check shows zero ohms or some specific reading
continuity by reading
alternating current has current reverses direction as the voltage goes through a positive/negative
flow that change
one pound of water is about one pint
