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04Signsination OLD VERSION
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Question 1. Under RCW 19.28, who is authorized to designate a Master Electrician for a sign contractor? A) The company owner only B) Any licensed electrician employed by the firm C) The designated master who holds a valid Washington Master Electrician license D) The state electrical inspector Answer: C Explanation: RCW 19.28 requires that a Master Electrician be a person who holds a current Washington Master Electrician license and is designated by the contractor. Question 2. The “Scope of Work” for a WA 04-Sign Specialty license does NOT include which of the following? A) Installation of electric signage B) Maintenance of sign wiring C) Design of structural steel supports for signs D) Repair of sign illumination systems Answer: C Explanation: The 04-Sign Specialty scope covers electrical aspects of signs; structural steel design is outside the electrical scope. Question 3. According to WAC 296-46B-080, which NEC edition is adopted for sign installations in Washington? A) 2011 NEC with state amendments
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B) 2020 NEC with state amendments C) 2017 NEC without amendments D) 2023 NEC with no amendments Answer: B Explanation: Washington adopts the 2020 NEC and adds state-specific amendments for sign work. Question 4. When applying for a sign permit in Washington, the applicant must submit which of the following? A) A signed affidavit of ownership only B) Electrical diagrams, mounting details, and a permit fee C) Only a photo of the proposed sign D) A copy of the contractor’s insurance policy Answer: B Explanation: The permit process requires detailed electrical plans, mounting information, and payment of the required fee. Question 5. UL 48-listed signs must be labeled with which of the following information? A) Manufacturer’s name, model number, and voltage rating B) Only the voltage rating C) Installation date and installer’s name D) Only the power source type
04Signsination OLD VERSION
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Question 8. For a commercial sign installation, the minimum number of branch circuits required by NEC 600- 4 (B) is: A) One per sign B) One per 10 kW of sign load C) One per 100 A of total load D) One per 5 kW of sign load Answer: B Explanation: NEC 600- 4 (B) mandates a separate branch circuit for each sign load exceeding 10 kW. Question 9. Which support material is prohibited for use with illuminated signs according to NEC 600-9? A) Non-combustible metal framing B) Treated lumber with fire-retardant coating C) Untreated wood framing D) Concrete pedestals Answer: C Explanation: Untreated wood is prohibited because it does not meet the fire-resistance requirements for illuminated signs. Question 10. Class 2 power sources are commonly used for LED signage because they: A) Provide higher voltage than Class 1 B) Limit fault current to 100 A or less, reducing shock hazard
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C. Require a dedicated transformer for each sign D. Must be grounded at the sign Answer: B Explanation: Class 2 circuits limit fault current, enhancing safety for low-voltage LED signs. Question 11. Neon secondary-circuit conductors must be installed using which type of cable per NEC 600 - 31? A) THHN in conduit only B) GTO cable with a minimum 3-ft separation from other conductors C) NM-B cable in raceways D) Direct-buried UF cable Answer: B Explanation: NEC 600-31 specifies GTO (glass-filled thermoset) cable for neon secondary circuits, with separation to prevent arcing. Question 12. When a metal pole is used as a sign support, NEC 600- 14 requires: A) The pole to be painted black B) The pole to be bonded to the equipment grounding conductor C. The pole to be insulated with rubber D. No special treatment Answer: B
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Question 15. Portable signs must be equipped with which safety feature according to NEC 600-98? A. A built-in battery charger B. A disconnecting means within 5 ft of the sign C. A grounding rod in the ground D. No safety feature required Answer: B Explanation: Portable signs require a readily accessible disconnect within 5 ft of the sign. Question 16. Ohm’s Law applied to a sign circuit with a 120 V supply and a measured current of 2 A yields a resistance of: A) 60 Ω B) 240 Ω C) 0.5 Ω D) 120 Ω Answer: A Explanation: R = V/I = 120 V / 2 A = 60 Ω. Question 17. A sign draws 15 A at 120 V. Its power consumption is: A) 1.8 kW B) 1.5 kW C) 180 W
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D) 2.0 kW Answer: A Explanation: P = V × I = 120 V × 15 A = 1,800 W = 1.8 kW. Question 18. Voltage drop on a 300-ft run of 12-AWG copper feeding a sign should not exceed: A) 2 % B) 3 % C) 5 % D) 10 % Answer: B Explanation: NEC recommends a maximum of 3 % voltage drop for branch-circuit conductors. Question 19. The minimum number of branch circuits for a sign installation with a total load of 25 kW is: A) 1 B) 2 C) 3 D) 4 Answer: B
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Question 22. According to NEC 250-122, the equipment grounding conductor size for a 30 A overcurrent device is: A) #12 AWG copper B) #10 AWG copper C) #8 AWG copper D) #6 AWG copper Answer: B Explanation: Table 250-122 specifies #10 AWG copper for a 30 A circuit. Question 23. Bonding of metal sign pedestals must be accomplished using: A) A separate grounding rod only B) The equipment grounding conductor run with the power circuit C) A dedicated bonding jumper of any size D) No bonding is required Answer: B Explanation: The pedestal is bonded by connecting it to the equipment grounding conductor of the sign circuit. Question 24. GFCI protection is required for which type of sign? A) Fixed indoor signs powered by Class 2 circuits B) Portable signs used outdoors C. Neon signs installed in dry locations
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D. All of the above Answer: B Explanation: NEC 600-98 requires GFCI for portable signs used in damp or wet locations. Question 25. Neon secondary-circuit ground-fault protection (SCGFP) is mandated when the secondary voltage exceeds: A) 30 V B) 50 V C) 100 V D) 150 V Answer: C Explanation: SCGFP is required for neon secondary circuits with voltage over 100 V. Question 26. The appropriate conduit size for a 3-circuit sign feeder using 12 - AWG THHN conductors is: A) ½-in. EMT B) ¾-in. EMT C) 1-in. EMT D) 1¼-in. EMT Answer: B
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Question 29. THHN insulation is suitable for which environment in sign installations? A) Wet locations only B) Dry locations only C) Both dry and wet locations when used in conduit D) Not suitable for sign work Answer: C Explanation: THHN is rated for dry locations but can be used in wet locations when installed in a conduit that provides protection. Question 30. “Sign cable” (UL-type) may be installed: A) Directly buried without conduit B) In any location without restrictions C) Only in raceways protected from physical damage D) Only for low-voltage (<12 V) signs Answer: C Explanation: Sign cable must be protected from physical damage, typically by raceways. Question 31. A neon sign requiring a 5 kVA transformer should be sized at: A) 4 kVA B) 5 kVA C) 6 kVA
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D) 10 kVA Answer: C Explanation: NEC 210-11 requires oversizing transformers by at least 125 % of the load for continuous applications; 5 kVA × 1.25 = 6.25 kVA, so a 6 kVA unit is selected. Question 32. Electronic ballasts for LED signs must be listed for use with: A) Only AC power sources B) Only DC power sources C) Both AC and DC, as specified by the manufacturer D. No listing required Answer: C Explanation: Ballasts must be listed for the specific voltage and current type they will be used with. Question 33. Thermal protection for sign transformers is required to trip at: A) 150 % of rated load B) 200 % of rated load C) 250 % of rated load D) No thermal protection required Answer: B
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Question 36. The lockout/tagout (LOTO) procedure for sign maintenance must include which step? A) Removing the sign entirely before lockout B) De-energizing the circuit and applying a lockable disconnect device C. Only posting a warning sign D. No LOTO required for low-voltage signs Answer: B Explanation: LOTO requires de-energizing and securing the circuit with a lockable device. Question 37. Wind load calculations for a large outdoor sign are based on which design standard? A) ASCE 7- 16 B) IEC 60335 C) NFPA 70B D) OSHA 1910 Answer: A Explanation: ASCE 7-16 provides wind-load criteria for sign structures. Question 38. Proper anchoring of a building-mounted sign must be performed using: A) Concrete anchors rated for the sign’s load B) Any screw that fits the wall C. Only adhesive tape
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D. No anchoring needed if the sign is lightweight Answer: A Explanation: Anchors must be rated for the calculated load to ensure safe attachment. Question 39. In Washington, a contractor who performs sign work without a valid WA 04-Sign Specialty license may be subject to: A) A warning only B) A fine of up to $1, C) A civil penalty of up to $5,000 per violation D. No penalty Answer: C Explanation: WAC 296-46B-020 outlines civil penalties up to $5,000 per violation for unlicensed work. Question 40. The NEC permits a single disconnecting means for multiple signs only when: A) The total load is less than 5 kW B) All signs are on the same circuit and within 50 ft of the disconnect C) The signs are all of the same type D. The disconnect is located at the main service panel Answer: B
04Signsination OLD VERSION
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Question 43. When installing a sign in a corrosive environment, the preferred conduit material is: A) EMT steel B) Rigid PVC C) Galvanized steel D) Aluminum Answer: B Explanation: Rigid PVC provides corrosion resistance suitable for harsh environments. Question 44. The NEC requires that all sign wiring be protected from physical damage by: A) Installing in a metal raceway only B) Using conduit, raceway, or cable with suitable protection C. Leaving the wiring exposed if it is low voltage D. No protection required for neon signs Answer: B Explanation: NEC 300-1 mandates protection against physical damage for all wiring. Question 45. A sign that operates continuously for more than 3 hours is classified as: A) Continuous load B) Non-continuous load
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C. Intermittent load D. Supplemental load Answer: A Explanation: Loads operating >3 hours are considered continuous per NEC definitions. Question 46. For a sign feeder with a calculated load of 12 kW at 240 V, the required feeder ampacity (before applying the 125 % factor) is: A) 40 A B) 50 A C) 60 A D) 70 A Answer: B Explanation: I = P/V = 12,000 W / 240 V = 50 A. Question 47. According to NEC 250-20, the grounding electrode system for a sign mounted on a metal pole must be: A) Connected to the nearest water pipe B) Connected to the building’s grounding electrode system C. Isolated from other grounding systems D. Not required Answer: B
