Delaware Sign Contractor/Specialty
Electrician Examination Practice Exam
2026 | 100+ Questions & Answers with
Detailed Rationales | Complete
Delaware Sign Contractor & Specialty
Electrician Exam Prep, Study Guide, Test
Review & Qualification Preparation
1. What is the primary purpose of an electrical disconnecting means for an
electrically operated sign?
A. To increase lamp brightness
B. To reduce voltage drop
C. To provide a means of disconnecting power for servicing
D. To regulate the sign timer
Answer: To provide a means of disconnecting power for servicing
Rationale: The disconnecting means allows the sign and its associated electrical
equipment to be de-energized so installation, inspection, maintenance, and
servicing can be performed safely.
,2. Which National Electrical Code article primarily addresses electric signs and
outline lighting?
A. Article 250
B. Article 600
C. Article 700
D. Article 725
Answer: Article 600
Rationale: NEC Article 600 covers electric signs, outline lighting, and associated
equipment, including wiring, disconnecting means, grounding, and installation
requirements.
3. What is the purpose of equipment grounding conductors in an electric sign
installation?
A. To carry normal load current
B. To increase the sign's operating voltage
C. To provide a low-impedance path for fault current
D. To reduce lamp temperature
Answer: To provide a low-impedance path for fault current
Rationale: An equipment grounding conductor helps facilitate operation of the
overcurrent protective device during a ground fault and reduces the risk of
electric shock.
4. A sign's branch circuit is protected by a 20-ampere circuit breaker. What is the
general maximum continuous load permitted on the circuit?
A. 10 amperes
B. 16 amperes
C. 20 amperes
D. 25 amperes
Answer: 16 amperes
,Rationale: Under the standard 125% continuous-load rule, a 20-ampere circuit is
generally limited to 16 amperes of continuous load unless another applicable
provision permits otherwise.
5. What device is commonly used to automatically control the operating
schedule of an illuminated sign?
A. Transformer
B. Timer or time switch
C. Junction box
D. Grounding electrode
Answer: Timer or time switch
Rationale: A timer or time switch can automatically energize and de-energize a
sign according to a programmed schedule.
6. Which component changes line voltage to a lower voltage suitable for certain
low-voltage sign systems?
A. Circuit breaker
B. Transformer
C. Disconnect switch
D. Photocell
Answer: Transformer
Rationale: A transformer transfers electrical energy between circuits and can
step voltage up or down as required by the sign system.
7. What is the primary function of a photocontrol on an exterior illuminated
sign?
A. Detect excessive current
B. Turn lighting on or off based on ambient light
C. Increase transformer efficiency
D. Ground the sign enclosure
, Answer: Turn lighting on or off based on ambient light
Rationale: A photocontrol senses surrounding light levels and can automatically
switch an exterior sign on at dusk and off at dawn.
8. Which material is commonly used for raceways because it provides
mechanical protection for conductors?
A. Paper
B. PVC or metal raceway
C. Cloth
D. Untreated cardboard
Answer: PVC or metal raceway
Rationale: Approved raceways protect conductors from physical damage and
provide an organized wiring pathway.
9. What is the purpose of an overcurrent protective device?
A. Increase conductor ampacity
B. Protect conductors and equipment from excessive current
C. Improve the color of illumination
D. Increase the sign's mounting strength
Answer: Protect conductors and equipment from excessive current
Rationale: Circuit breakers and fuses interrupt excessive current caused by
overloads or short circuits, helping protect conductors and connected
equipment.
10. What should be done before working inside an electrically powered sign?
A. Increase the circuit voltage
B. Turn on all lamps
C. De-energize the circuit and verify the absence of voltage
D. Remove the grounding conductor
Electrician Examination Practice Exam
2026 | 100+ Questions & Answers with
Detailed Rationales | Complete
Delaware Sign Contractor & Specialty
Electrician Exam Prep, Study Guide, Test
Review & Qualification Preparation
1. What is the primary purpose of an electrical disconnecting means for an
electrically operated sign?
A. To increase lamp brightness
B. To reduce voltage drop
C. To provide a means of disconnecting power for servicing
D. To regulate the sign timer
Answer: To provide a means of disconnecting power for servicing
Rationale: The disconnecting means allows the sign and its associated electrical
equipment to be de-energized so installation, inspection, maintenance, and
servicing can be performed safely.
,2. Which National Electrical Code article primarily addresses electric signs and
outline lighting?
A. Article 250
B. Article 600
C. Article 700
D. Article 725
Answer: Article 600
Rationale: NEC Article 600 covers electric signs, outline lighting, and associated
equipment, including wiring, disconnecting means, grounding, and installation
requirements.
3. What is the purpose of equipment grounding conductors in an electric sign
installation?
A. To carry normal load current
B. To increase the sign's operating voltage
C. To provide a low-impedance path for fault current
D. To reduce lamp temperature
Answer: To provide a low-impedance path for fault current
Rationale: An equipment grounding conductor helps facilitate operation of the
overcurrent protective device during a ground fault and reduces the risk of
electric shock.
4. A sign's branch circuit is protected by a 20-ampere circuit breaker. What is the
general maximum continuous load permitted on the circuit?
A. 10 amperes
B. 16 amperes
C. 20 amperes
D. 25 amperes
Answer: 16 amperes
,Rationale: Under the standard 125% continuous-load rule, a 20-ampere circuit is
generally limited to 16 amperes of continuous load unless another applicable
provision permits otherwise.
5. What device is commonly used to automatically control the operating
schedule of an illuminated sign?
A. Transformer
B. Timer or time switch
C. Junction box
D. Grounding electrode
Answer: Timer or time switch
Rationale: A timer or time switch can automatically energize and de-energize a
sign according to a programmed schedule.
6. Which component changes line voltage to a lower voltage suitable for certain
low-voltage sign systems?
A. Circuit breaker
B. Transformer
C. Disconnect switch
D. Photocell
Answer: Transformer
Rationale: A transformer transfers electrical energy between circuits and can
step voltage up or down as required by the sign system.
7. What is the primary function of a photocontrol on an exterior illuminated
sign?
A. Detect excessive current
B. Turn lighting on or off based on ambient light
C. Increase transformer efficiency
D. Ground the sign enclosure
, Answer: Turn lighting on or off based on ambient light
Rationale: A photocontrol senses surrounding light levels and can automatically
switch an exterior sign on at dusk and off at dawn.
8. Which material is commonly used for raceways because it provides
mechanical protection for conductors?
A. Paper
B. PVC or metal raceway
C. Cloth
D. Untreated cardboard
Answer: PVC or metal raceway
Rationale: Approved raceways protect conductors from physical damage and
provide an organized wiring pathway.
9. What is the purpose of an overcurrent protective device?
A. Increase conductor ampacity
B. Protect conductors and equipment from excessive current
C. Improve the color of illumination
D. Increase the sign's mounting strength
Answer: Protect conductors and equipment from excessive current
Rationale: Circuit breakers and fuses interrupt excessive current caused by
overloads or short circuits, helping protect conductors and connected
equipment.
10. What should be done before working inside an electrically powered sign?
A. Increase the circuit voltage
B. Turn on all lamps
C. De-energize the circuit and verify the absence of voltage
D. Remove the grounding conductor
