CFESA ELECTRICAL PRACTICE TEST
UPDATED ACTUAL Exam Questions and
CORRECT Answers
A capacitor start motor should be used in what applications? - CORRECT ANSWER -
used 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
ANSWER - Open 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 ANSWER - No 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 ANSWER - True
A thermostat has a differential of 5°F. This means: - CORRECT ANSWER - the
temperature needs to drop 5 degrees below the set point before the heating system turns on
Wall receptacles failed due to: - CORRECT ANSWER - loose 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 ANSWER - False
Before working on electrical equipment with the power on: - CORRECT ANSWER -
Proper PPE must be worn, example of this is linesman's gloves
,Add 240 V range connected to a 208 V power supply will: - CORRECT ANSWER - it
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 ANSWER - False, 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 ANSWER - P= I x I x R
A hot line in an AC power supply contains 120 V. T or F? - CORRECT ANSWER - False,
120 volts is the difference in potential between the hot line and neutral.
On the ohms law wheel what does P stand for? - CORRECT ANSWER - Power
Line voltage is the potential difference between: - CORRECT ANSWER - any 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 ANSWER - 1/1000
The total resistance of a unit but the 230 amp heating elements connected in a series is: -
CORRECT ANSWER - The total sum of the individual resistances- RT= R1+R2+R3...
The total resistance in an parallel circuit is called: - CORRECT ANSWER - 1/RT=
1/R1+1/R2...
Power defined by the ohms law formula: - CORRECT ANSWER - Amount of electrical
energy used
, Any thermostat that fails in a closed contact position: - CORRECT ANSWER - Most
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
ANSWER - This usually indicates a worn hub on the blade
Higher voltage supplies are used to: - CORRECT ANSWER - Decrease 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 ANSWER - A "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
ANSWER - 120V
On the ohms law wheel what does R stand for? - CORRECT ANSWER -
Resistance(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
ANSWER - Unplug and inspect the grounding
A 208 V fryer connected to a 240 V supply could have what results? - CORRECT
ANSWER - 35% 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 ANSWER - Step up
transformer
UPDATED ACTUAL Exam Questions and
CORRECT Answers
A capacitor start motor should be used in what applications? - CORRECT ANSWER -
used 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
ANSWER - Open 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 ANSWER - No 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 ANSWER - True
A thermostat has a differential of 5°F. This means: - CORRECT ANSWER - the
temperature needs to drop 5 degrees below the set point before the heating system turns on
Wall receptacles failed due to: - CORRECT ANSWER - loose 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 ANSWER - False
Before working on electrical equipment with the power on: - CORRECT ANSWER -
Proper PPE must be worn, example of this is linesman's gloves
,Add 240 V range connected to a 208 V power supply will: - CORRECT ANSWER - it
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 ANSWER - False, 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 ANSWER - P= I x I x R
A hot line in an AC power supply contains 120 V. T or F? - CORRECT ANSWER - False,
120 volts is the difference in potential between the hot line and neutral.
On the ohms law wheel what does P stand for? - CORRECT ANSWER - Power
Line voltage is the potential difference between: - CORRECT ANSWER - any 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 ANSWER - 1/1000
The total resistance of a unit but the 230 amp heating elements connected in a series is: -
CORRECT ANSWER - The total sum of the individual resistances- RT= R1+R2+R3...
The total resistance in an parallel circuit is called: - CORRECT ANSWER - 1/RT=
1/R1+1/R2...
Power defined by the ohms law formula: - CORRECT ANSWER - Amount of electrical
energy used
, Any thermostat that fails in a closed contact position: - CORRECT ANSWER - Most
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
ANSWER - This usually indicates a worn hub on the blade
Higher voltage supplies are used to: - CORRECT ANSWER - Decrease 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 ANSWER - A "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
ANSWER - 120V
On the ohms law wheel what does R stand for? - CORRECT ANSWER -
Resistance(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
ANSWER - Unplug and inspect the grounding
A 208 V fryer connected to a 240 V supply could have what results? - CORRECT
ANSWER - 35% 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 ANSWER - Step up
transformer
