CFESA ELECTRICAL PRACTICE TEST QUESTIONS
A capacitor start motor should be used in what applications? - 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? - 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? - 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? - Answer -True
A thermostat has a differential of 5°F. This means: - Answer -the temperature needs to
drop 5 degrees below the set point before the heating system turns on
Wall receptacles failed due to: - 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? - Answer -False
Before working on electrical equipment with the power on: - 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: - 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? - 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? - Answer -P= I x I x R
A hot line in an AC power supply contains 120 V. T or F? - 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? - Answer -Power
, Line voltage is the potential difference between: - 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: - Answer -1/1000
The total resistance of a unit but the 230 amp heating elements connected in a series is:
- Answer -The total sum of the individual resistances- RT= R1+R2+R3...
The total resistance in an parallel circuit is called: - Answer -1/RT= 1/R1+1/R2...
Power defined by the ohms law formula: - Answer -Amount of electrical energy used
Any thermostat that fails in a closed contact position: - 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: - Answer -This
usually indicates a worn hub on the blade
Higher voltage supplies are used to: - 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? - 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: - Answer -120V
On the ohms law wheel what does R stand for? - 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:
- Answer -Unplug and inspect the grounding
A 208 V fryer connected to a 240 V supply could have what results? - 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? - Answer -Step up
transformer
A capacitor start motor should be used in what applications? - 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? - 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? - 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? - Answer -True
A thermostat has a differential of 5°F. This means: - Answer -the temperature needs to
drop 5 degrees below the set point before the heating system turns on
Wall receptacles failed due to: - 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? - Answer -False
Before working on electrical equipment with the power on: - 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: - 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? - 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? - Answer -P= I x I x R
A hot line in an AC power supply contains 120 V. T or F? - 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? - Answer -Power
, Line voltage is the potential difference between: - 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: - Answer -1/1000
The total resistance of a unit but the 230 amp heating elements connected in a series is:
- Answer -The total sum of the individual resistances- RT= R1+R2+R3...
The total resistance in an parallel circuit is called: - Answer -1/RT= 1/R1+1/R2...
Power defined by the ohms law formula: - Answer -Amount of electrical energy used
Any thermostat that fails in a closed contact position: - 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: - Answer -This
usually indicates a worn hub on the blade
Higher voltage supplies are used to: - 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? - 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: - Answer -120V
On the ohms law wheel what does R stand for? - 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:
- Answer -Unplug and inspect the grounding
A 208 V fryer connected to a 240 V supply could have what results? - 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? - Answer -Step up
transformer
