Page 1 of 82
CFESA ELECTRICAL FINAL EXAM AND PRACTICE
EXAM NEWEST 2026 ACTUAL EXAM QUESTIONS
AND CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) ALL ANSWERED {550 Q & A} ALREADY
GRADED A+ | BRAND NEW! | 100% GUARANTEED
PASS
Why do mercury contactors fail? - ✔✔✔ Correct Answer > Loose
connections
How did adding a second probe to the control system correct this
downfall? - ✔✔✔ Correct Answer > Created differential between the cut
off and cut on levels
What opens and closes the circuit in a solid state relay? - ✔✔✔
Correct Answer > Triac
Solid state relays are very susceptible to what problem in
commercial cooking equipment? - ✔✔✔ Correct Answer > Heat
What must you do when installing a new solid state relay? - ✔✔✔
Correct Answer > Heat sink it, and make sure wire and terminals are
in perfect shape
,Page 2 of 82
What is the only way to check the operation of a solid state relay?
- ✔✔✔ Correct Answer > Ammeter
Solid state relays are most often switched on but with what type
of voltage? - ✔✔✔ Correct Answer > AC
Solid state relays usually fail in what mode? - ✔✔✔ Correct Answer >
Closed circuit
What is the difference between an AC and a DC relay? - ✔✔✔ Correct
Answer > Coil Resistance
Are AC and DC relays interchangeable? - ✔✔✔ Correct Answer > No
Why are more DC relays being used in hot and cold side
equipment today? - ✔✔✔ Correct Answer > Because the output from
most solid state controls is DC voltage
What is the most common type of signal light? - ✔✔✔ Correct Answer >
Neon
,Page 3 of 82
Does a neon signal light have any resistance when checked with
an ohmeter? - ✔✔✔ Correct Answer > No
Neon lights are designed in lower voltages. How can they be
used in higher voltages? - ✔✔✔ Correct Answer > Resistors built into
the socket to lower the voltage
LED signal operate at what voltage? - ✔✔✔ Correct Answer > Low
voltage in the range of 3 to 6 VDC
A signal light connected across a load will indicate what? - ✔✔✔
Correct Answer > When the load is energized
A signal light connected across a control will indicate what? -
✔✔✔ Correct Answer > When the control contacts are open
Will neon lights conduct much of a current? - ✔✔✔ Correct Answer >
No
What normally shorts in a neon light, the bulb, the connections,
or the socket? - ✔✔✔ Correct Answer > Socket
When a neon light shorts , can you normally read a short to
ground with an ohmmeter? - ✔✔✔ Correct Answer > No
, Page 4 of 82
How can neon signal lights be used to help troubleshoot erratic
equipment? - ✔✔✔ Correct Answer > They can be wired across
controls to tell when they are open and across loads to tell when
they have power
Anytime you have a short circuit and cannot read a problem with
an ohmmeter, the problem will most often be found in one of
what two componenets? - ✔✔✔ Correct Answer > Switches or signal
lights
If a neon light starts flickering, what is indicated? - ✔✔✔ Correct
Answer > The light is failing, it just needs to be replaced
The voltage produced in a transformer is directly proportional to
what? - ✔✔✔ Correct Answer > Number of turns on the primary and
secondary
The current a transformer can handle is inversely proportional to
what? - ✔✔✔ Correct Answer > Number of turns
What is an isolation transformer? - ✔✔✔ Correct Answer > A
transformer with a secondary with no potential ground
CFESA ELECTRICAL FINAL EXAM AND PRACTICE
EXAM NEWEST 2026 ACTUAL EXAM QUESTIONS
AND CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) ALL ANSWERED {550 Q & A} ALREADY
GRADED A+ | BRAND NEW! | 100% GUARANTEED
PASS
Why do mercury contactors fail? - ✔✔✔ Correct Answer > Loose
connections
How did adding a second probe to the control system correct this
downfall? - ✔✔✔ Correct Answer > Created differential between the cut
off and cut on levels
What opens and closes the circuit in a solid state relay? - ✔✔✔
Correct Answer > Triac
Solid state relays are very susceptible to what problem in
commercial cooking equipment? - ✔✔✔ Correct Answer > Heat
What must you do when installing a new solid state relay? - ✔✔✔
Correct Answer > Heat sink it, and make sure wire and terminals are
in perfect shape
,Page 2 of 82
What is the only way to check the operation of a solid state relay?
- ✔✔✔ Correct Answer > Ammeter
Solid state relays are most often switched on but with what type
of voltage? - ✔✔✔ Correct Answer > AC
Solid state relays usually fail in what mode? - ✔✔✔ Correct Answer >
Closed circuit
What is the difference between an AC and a DC relay? - ✔✔✔ Correct
Answer > Coil Resistance
Are AC and DC relays interchangeable? - ✔✔✔ Correct Answer > No
Why are more DC relays being used in hot and cold side
equipment today? - ✔✔✔ Correct Answer > Because the output from
most solid state controls is DC voltage
What is the most common type of signal light? - ✔✔✔ Correct Answer >
Neon
,Page 3 of 82
Does a neon signal light have any resistance when checked with
an ohmeter? - ✔✔✔ Correct Answer > No
Neon lights are designed in lower voltages. How can they be
used in higher voltages? - ✔✔✔ Correct Answer > Resistors built into
the socket to lower the voltage
LED signal operate at what voltage? - ✔✔✔ Correct Answer > Low
voltage in the range of 3 to 6 VDC
A signal light connected across a load will indicate what? - ✔✔✔
Correct Answer > When the load is energized
A signal light connected across a control will indicate what? -
✔✔✔ Correct Answer > When the control contacts are open
Will neon lights conduct much of a current? - ✔✔✔ Correct Answer >
No
What normally shorts in a neon light, the bulb, the connections,
or the socket? - ✔✔✔ Correct Answer > Socket
When a neon light shorts , can you normally read a short to
ground with an ohmmeter? - ✔✔✔ Correct Answer > No
, Page 4 of 82
How can neon signal lights be used to help troubleshoot erratic
equipment? - ✔✔✔ Correct Answer > They can be wired across
controls to tell when they are open and across loads to tell when
they have power
Anytime you have a short circuit and cannot read a problem with
an ohmmeter, the problem will most often be found in one of
what two componenets? - ✔✔✔ Correct Answer > Switches or signal
lights
If a neon light starts flickering, what is indicated? - ✔✔✔ Correct
Answer > The light is failing, it just needs to be replaced
The voltage produced in a transformer is directly proportional to
what? - ✔✔✔ Correct Answer > Number of turns on the primary and
secondary
The current a transformer can handle is inversely proportional to
what? - ✔✔✔ Correct Answer > Number of turns
What is an isolation transformer? - ✔✔✔ Correct Answer > A
transformer with a secondary with no potential ground
