CFESA Electrical Practice Test – 2025/2026
Updated Study Guide & Exam Prep | 100%
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A capacitor start motor should be used in what applications? - correct answerused for
heavy-duty applications requiring high starting torque. refrigerator compressors, pumps,
and conveyors.
You have 120 V super warmer that is not heating. Your meter reads 120 V from each
side of the element to the ground. The voltage across the element reads 0 V. What is
the issue? - correct answerOpen neutral after the element
If you check each side of an element terminal to ground and read 120 V does that mean
the element has voltage to it? - correct answerNo measure voltage across the load, not
from each terminal to ground
A ground fault breaker is considered more reliable than a ground fault receptacle. T or
F? - correct answerTrue
A thermostat has a differential of 5°F. This means: - correct answerthe temperature
needs to drop 5 degrees below the set point before the heating system turns on
Wall receptacles failed due to: - correct answerloose wires, overloaded circuits (tripped
breakers), damaged internal components, wear and tear from frequent use, exposure to
moisture, or physical damage which can lead to poor connections or short circuits.
It is still possible to get shocked by touching the casing of a piece of equipment if it is
properly grounded. T or F? - correct answerFalse
Before working on electrical equipment with the power on: - correct answerProper PPE
must be worn, example of this is linesman's gloves
Add 240 V range connected to a 208 V power supply will: - correct answerit will likely
operate with reduced power and potentially experience issues like longer cooking times,
decreased heating efficiency, and could potentially be damaged over time
AC power has a negative and a positive line. T or F? - correct answerFalse, it has a hot
and a neutral
,Which formula should you use to determine the power consumed by a 15 ohm heater
element with 8 A of current flowing through it? - correct answerP= I x I x R
A hot line in an AC power supply contains 120 V. T or F? - correct answerFalse, 120
volts is the difference in potential between the hot line and neutral.
On the ohms law wheel what does P stand for? - correct answerPower
Line voltage is the potential difference between: - correct answerany two lines and
phases in a three-phase electrical system; essentially, the voltage measured between
two live wires in a power circuit.
Prefix Milli means: - correct answer1/1000
The total resistance of a unit but the 230 amp heating elements connected in a series is:
- correct answerThe total sum of the individual resistances- RT= R1+R2+R3...
The total resistance in an parallel circuit is called: - correct answer1/RT= 1/R1+1/R2...
Power defined by the ohms law formula: - correct answerAmount of electrical energy
used
Any thermostat that fails in a closed contact position: - correct answerMost likely carried
an excessive load. The thermostat was used in a power duty application or the
thermostat was involved in a short-circuited load.
If a blower keeps coming off the motor shaft after it runs for a while: - correct
answerThis usually indicates a worn hub on the blade
Higher voltage supplies are used to: - correct answerDecrease wire size and save
costs, they also are needed for modern luxuries such as Central A/C, driers, etc.
A wild leg must always be connected where on the terminal block on a three phase
equipment? - correct answerA "wild leg" (also called a "high leg") in a three-phase
system should always be connected to the designated "B" phase terminal on a terminal
block, as per standard electrical practice, which usually marks the phase with the higher
voltage to neutral as "B" phase, it must not go on the 120 v terminal.
Voltage between the Hotline and neutral of a 208 V power supply: - correct answer120V
On the ohms law wheel what does R stand for? - correct answerResistance(ohms)
When your customer leans over metal counter and touches the toaster a shark is
received. You have checked the toaster and the ground circuit is complete. You should:
- correct answerUnplug and inspect the grounding
, A 208 V fryer connected to a 240 V supply could have what results? - correct
answer35% more power can affect the cooking characteristics of the equipment. This
can cause damage to the components.
Jerry is working at a job site where the voltage to the building is 208 V. The oven the
customer just got is 240 V. What kind of transformer will he get? - correct answerStep
up transformer
The neon signal light can be connected across the contacts of a high limit temperature
thermostat to indicate when the control opens because: - correct answerit will only light
up when the thermostat contacts are open, breaking the circuit to the load
. If the element shorts to ground when the switch is closed: - correct answerShort circuit
occurs
To properly check a regular transformer you should? - correct answeralways check
output with load connected
I warmer has an infinite switch but the terminal literally burned out of it. - correct
answerIf an infinite switch burns up at the terminals, the wiring and the terminal
connectors have to be replaced as they have been damaged
What does prefix Micro mean - correct answer1/1000000 or 1/1 millionth
What does prefix kilo mean - correct answer1000 times
What does prefix mega mean - correct answer1000000 times or 1 million times
What does prefix milli mean - correct answer1/1000 or 1/1 thousandth
What happens to current in a parallel circuit? - correct answerIt divides across the
resistances
What happens to voltage across the loads in a parallel circuit - correct answerStays the
same
What happens to voltage across loads in a series circuit - correct answerIt divides
across the resistances
What happens to the current in a series circuit? - correct answerIt stays the same
everywhere
What is the voltage between two hot lines in a 230 V system? - correct answer230 V
What is the voltage between two hot lines in a 208 V system? - correct answer208 V
Updated Study Guide & Exam Prep | 100%
Pass Guarantee
A capacitor start motor should be used in what applications? - correct answerused for
heavy-duty applications requiring high starting torque. refrigerator compressors, pumps,
and conveyors.
You have 120 V super warmer that is not heating. Your meter reads 120 V from each
side of the element to the ground. The voltage across the element reads 0 V. What is
the issue? - correct answerOpen neutral after the element
If you check each side of an element terminal to ground and read 120 V does that mean
the element has voltage to it? - correct answerNo measure voltage across the load, not
from each terminal to ground
A ground fault breaker is considered more reliable than a ground fault receptacle. T or
F? - correct answerTrue
A thermostat has a differential of 5°F. This means: - correct answerthe temperature
needs to drop 5 degrees below the set point before the heating system turns on
Wall receptacles failed due to: - correct answerloose wires, overloaded circuits (tripped
breakers), damaged internal components, wear and tear from frequent use, exposure to
moisture, or physical damage which can lead to poor connections or short circuits.
It is still possible to get shocked by touching the casing of a piece of equipment if it is
properly grounded. T or F? - correct answerFalse
Before working on electrical equipment with the power on: - correct answerProper PPE
must be worn, example of this is linesman's gloves
Add 240 V range connected to a 208 V power supply will: - correct answerit will likely
operate with reduced power and potentially experience issues like longer cooking times,
decreased heating efficiency, and could potentially be damaged over time
AC power has a negative and a positive line. T or F? - correct answerFalse, it has a hot
and a neutral
,Which formula should you use to determine the power consumed by a 15 ohm heater
element with 8 A of current flowing through it? - correct answerP= I x I x R
A hot line in an AC power supply contains 120 V. T or F? - correct answerFalse, 120
volts is the difference in potential between the hot line and neutral.
On the ohms law wheel what does P stand for? - correct answerPower
Line voltage is the potential difference between: - correct answerany two lines and
phases in a three-phase electrical system; essentially, the voltage measured between
two live wires in a power circuit.
Prefix Milli means: - correct answer1/1000
The total resistance of a unit but the 230 amp heating elements connected in a series is:
- correct answerThe total sum of the individual resistances- RT= R1+R2+R3...
The total resistance in an parallel circuit is called: - correct answer1/RT= 1/R1+1/R2...
Power defined by the ohms law formula: - correct answerAmount of electrical energy
used
Any thermostat that fails in a closed contact position: - correct answerMost likely carried
an excessive load. The thermostat was used in a power duty application or the
thermostat was involved in a short-circuited load.
If a blower keeps coming off the motor shaft after it runs for a while: - correct
answerThis usually indicates a worn hub on the blade
Higher voltage supplies are used to: - correct answerDecrease wire size and save
costs, they also are needed for modern luxuries such as Central A/C, driers, etc.
A wild leg must always be connected where on the terminal block on a three phase
equipment? - correct answerA "wild leg" (also called a "high leg") in a three-phase
system should always be connected to the designated "B" phase terminal on a terminal
block, as per standard electrical practice, which usually marks the phase with the higher
voltage to neutral as "B" phase, it must not go on the 120 v terminal.
Voltage between the Hotline and neutral of a 208 V power supply: - correct answer120V
On the ohms law wheel what does R stand for? - correct answerResistance(ohms)
When your customer leans over metal counter and touches the toaster a shark is
received. You have checked the toaster and the ground circuit is complete. You should:
- correct answerUnplug and inspect the grounding
, A 208 V fryer connected to a 240 V supply could have what results? - correct
answer35% more power can affect the cooking characteristics of the equipment. This
can cause damage to the components.
Jerry is working at a job site where the voltage to the building is 208 V. The oven the
customer just got is 240 V. What kind of transformer will he get? - correct answerStep
up transformer
The neon signal light can be connected across the contacts of a high limit temperature
thermostat to indicate when the control opens because: - correct answerit will only light
up when the thermostat contacts are open, breaking the circuit to the load
. If the element shorts to ground when the switch is closed: - correct answerShort circuit
occurs
To properly check a regular transformer you should? - correct answeralways check
output with load connected
I warmer has an infinite switch but the terminal literally burned out of it. - correct
answerIf an infinite switch burns up at the terminals, the wiring and the terminal
connectors have to be replaced as they have been damaged
What does prefix Micro mean - correct answer1/1000000 or 1/1 millionth
What does prefix kilo mean - correct answer1000 times
What does prefix mega mean - correct answer1000000 times or 1 million times
What does prefix milli mean - correct answer1/1000 or 1/1 thousandth
What happens to current in a parallel circuit? - correct answerIt divides across the
resistances
What happens to voltage across the loads in a parallel circuit - correct answerStays the
same
What happens to voltage across loads in a series circuit - correct answerIt divides
across the resistances
What happens to the current in a series circuit? - correct answerIt stays the same
everywhere
What is the voltage between two hot lines in a 230 V system? - correct answer230 V
What is the voltage between two hot lines in a 208 V system? - correct answer208 V
