AR ES Electrical Sign Contractor Exam
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
1. What is the primary purpose of an electrical disconnecting means
for an illuminated sign?
A. To increase the brightness of the sign
B. To regulate the sign's operating temperature
C. To disconnect the sign's electrical supply for servicing and
maintenance
D. To prevent all voltage fluctuations in the electrical system
Rationale: A disconnecting means allows the electrical supply to be
isolated from the sign so maintenance personnel can work safely. It
must be properly rated, accessible as required, and suitable for the
,electrical characteristics of the installation. A disconnect does not
regulate brightness or eliminate every possible voltage fluctuation.
2. Before beginning electrical work on an existing sign, what should a
qualified worker do first?
A. Remove the sign's face panel
B. Disconnect the neutral conductor only
C. Begin removing the wiring while wearing insulated gloves
D. Identify the energy sources, isolate them, and verify the absence of
voltage
Rationale: Electrical work should begin with identifying all possible
energy sources, disconnecting them, applying appropriate
lockout/tagout procedures, and testing to verify that the circuit is de-
energized. Testing instruments must be suitable for the circuit and
checked for proper operation. Some signs may have multiple supplies
or stored energy that must also be addressed.
3. Which device is primarily intended to protect a branch circuit
against excessive current caused by an overload or short circuit?
A. Photocell
B. Circuit breaker
,C. Dimmer switch
D. Transformer enclosure
Rationale: A circuit breaker is an overcurrent protective device
designed to interrupt current when specified overload or short-circuit
conditions occur. Its rating must be coordinated with the conductors,
equipment, and applicable electrical requirements. A photocell
controls operation based on light levels, while a transformer enclosure
provides protection for electrical components.
4. What is the primary function of the equipment grounding
conductor in an electrical sign installation?
A. To carry normal load current continuously
B. To increase the voltage supplied to the sign
C. To provide a low-impedance fault-current path that helps
protective devices operate
D. To replace the grounded neutral conductor in every circuit
Rationale: The equipment grounding conductor connects exposed
conductive equipment parts to the grounding and bonding system. If a
fault energizes a metal enclosure, the grounding path helps facilitate
sufficient fault current to operate the overcurrent protective device. It
, is not intended to carry normal load current and does not generally
replace the neutral.
5. Which instrument is commonly used to measure voltage in an
electrical sign circuit?
A. Clamp meter used only for current
B. Insulation resistance tester used only for insulation testing
C. A properly rated multimeter set to the appropriate voltage function
D. A noncontact voltage detector used as the sole proof of absence of
voltage
Rationale: A properly rated multimeter can measure AC or DC voltage
when the correct function, range, and terminals are selected. The
meter and test leads must be appropriate for the circuit's voltage and
measurement category. A noncontact detector is useful for
preliminary screening but should not be the sole instrument used to
verify a circuit is de-energized.
6. What is the safest response if a worker discovers damaged
insulation on a sign's electrical conductors?
A. Cover the damaged area with ordinary adhesive tape and continue
B. Increase the circuit breaker rating
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
1. What is the primary purpose of an electrical disconnecting means
for an illuminated sign?
A. To increase the brightness of the sign
B. To regulate the sign's operating temperature
C. To disconnect the sign's electrical supply for servicing and
maintenance
D. To prevent all voltage fluctuations in the electrical system
Rationale: A disconnecting means allows the electrical supply to be
isolated from the sign so maintenance personnel can work safely. It
must be properly rated, accessible as required, and suitable for the
,electrical characteristics of the installation. A disconnect does not
regulate brightness or eliminate every possible voltage fluctuation.
2. Before beginning electrical work on an existing sign, what should a
qualified worker do first?
A. Remove the sign's face panel
B. Disconnect the neutral conductor only
C. Begin removing the wiring while wearing insulated gloves
D. Identify the energy sources, isolate them, and verify the absence of
voltage
Rationale: Electrical work should begin with identifying all possible
energy sources, disconnecting them, applying appropriate
lockout/tagout procedures, and testing to verify that the circuit is de-
energized. Testing instruments must be suitable for the circuit and
checked for proper operation. Some signs may have multiple supplies
or stored energy that must also be addressed.
3. Which device is primarily intended to protect a branch circuit
against excessive current caused by an overload or short circuit?
A. Photocell
B. Circuit breaker
,C. Dimmer switch
D. Transformer enclosure
Rationale: A circuit breaker is an overcurrent protective device
designed to interrupt current when specified overload or short-circuit
conditions occur. Its rating must be coordinated with the conductors,
equipment, and applicable electrical requirements. A photocell
controls operation based on light levels, while a transformer enclosure
provides protection for electrical components.
4. What is the primary function of the equipment grounding
conductor in an electrical sign installation?
A. To carry normal load current continuously
B. To increase the voltage supplied to the sign
C. To provide a low-impedance fault-current path that helps
protective devices operate
D. To replace the grounded neutral conductor in every circuit
Rationale: The equipment grounding conductor connects exposed
conductive equipment parts to the grounding and bonding system. If a
fault energizes a metal enclosure, the grounding path helps facilitate
sufficient fault current to operate the overcurrent protective device. It
, is not intended to carry normal load current and does not generally
replace the neutral.
5. Which instrument is commonly used to measure voltage in an
electrical sign circuit?
A. Clamp meter used only for current
B. Insulation resistance tester used only for insulation testing
C. A properly rated multimeter set to the appropriate voltage function
D. A noncontact voltage detector used as the sole proof of absence of
voltage
Rationale: A properly rated multimeter can measure AC or DC voltage
when the correct function, range, and terminals are selected. The
meter and test leads must be appropriate for the circuit's voltage and
measurement category. A noncontact detector is useful for
preliminary screening but should not be the sole instrument used to
verify a circuit is de-energized.
6. What is the safest response if a worker discovers damaged
insulation on a sign's electrical conductors?
A. Cover the damaged area with ordinary adhesive tape and continue
B. Increase the circuit breaker rating
