Download Oregon Communication System Specialty Exam Questions and Answers and more Exams Technology in PDF only on Docsity!
Specialty Exam
Question 1. According to ORS 479, who is authorized to perform electrical installations in Oregon? A) Any employee B) Licensed electricians or limited energy technicians C) Building owners only D) General contractors Answer: B Explanation: ORS 479 restricts electrical installations to licensed electricians or limited energy technicians to ensure safety and code compliance. Question 2. What is the definition of a “limited energy technician” under Oregon law? A) Someone who installs power wiring B) Someone licensed to work on circuits operating at 1000 volts or less C) Someone who repairs only appliances D) Someone permitted to perform all types of electrical work Answer: B Explanation: Oregon law defines a limited energy technician as a person licensed to install, maintain, or repair circuits of 1000 volts or less, typically for communication, alarm, or control systems. Question 3. What is the minimum licensing requirement to perform work on a protective signaling system in Oregon? A) General electrician license B) Limited Energy Technician license C) No license required D) Electrical contractor license only Answer: B Explanation: Work on protective signaling systems (such as fire alarms) requires a Limited Energy Technician license in Oregon. Question 4. Which of the following is a Class A Limited Energy Technician (LEA) allowed to install?
Specialty Exam
A) High-voltage switchgear B) Fire alarm systems C) Overhead power lines D) Service entrance conductors Answer: B Explanation: LEA licensees are specifically authorized to work on fire alarm and similar limited energy systems. Question 5. Which Oregon Administrative Rule governs the licensing of limited energy technicians? A) OAR 918 B) OAR 123 C) OAR 250 D) OAR 800 Answer: A Explanation: OAR 918 provides the administrative procedures for licensing through the Building Codes Division. Question 6. What is required before performing electrical work in Oregon? A) Verbal permission from the building owner B) An electrical permit issued by the authority having jurisdiction C) A written contract only D) No requirements Answer: B Explanation: Electrical permits are mandatory prior to starting electrical or limited energy work for legal and inspection purposes. Question 7. What are the consequences of performing unlicensed electrical work in Oregon? A) No consequences B) Civil penalties and possible criminal charges
Specialty Exam
Answer: A Explanation: Enforcement of the code is the responsibility of the state and local jurisdiction building officials. Question 11. What does “listed” mean as defined by the NEC Article 100? A) Mentioned in the product manual B) Approved by a recognized testing laboratory C) Sold at a retail store D) Used in any installation Answer: B Explanation: "Listed" refers to equipment tested and approved by a recognized testing laboratory (such as UL). Question 12. What is required for electrical equipment to be suitable for installation in Oregon? A) A manufacturer's warranty B) Listing and labeling by a recognized testing agency C) Imported status D) Free product support Answer: B Explanation: Only listed and labeled equipment by recognized testing agencies is accepted for installation. Question 13. What is the required clearance in front of electrical panels, per NEC Article 110? A) 12 inches B) 36 inches C) 6 feet D) No clearance required Answer: B
Specialty Exam
Explanation: NEC 110 requires at least 36 inches of clear working space in front of electrical panels for safety and maintenance access. Question 14. Which of the following best defines a “plenum” as per NEC Article 100? A) An attic space B) An enclosed space used for environmental air circulation C) An outdoor patio D) A wall cavity Answer: B Explanation: A plenum is a space used for environmental air handling, requiring special cable ratings due to fire hazards. Question 15. What is a Fine Print Note (FPN) in the NEC? A) Mandatory code language B) Informational notes that are not enforceable C) Manufacturer instructions D) City-specific regulations Answer: B Explanation: FPNs provide explanatory material but are not enforceable requirements. Question 16. Which of the following is a general requirement for electrical installations under NEC Article 110? A) Quick installation B) Installation in a neat and workmanlike manner C) Use of non-listed materials D) Skipping inspections Answer: B Explanation: NEC 110.12 requires all electrical work to be performed in a neat and workmanlike manner.
Specialty Exam
B) Use of approved fire-stopping methods C) Only labeling is needed D) Doubling the cable jacket Answer: B Explanation: Approved fire-stopping materials and methods are required to maintain the integrity of fire-rated assemblies. Question 21. According to NEC 300.22, where are only plenum-rated cables permitted? A) In exterior raceways B) In environmental air-handling plenums C) In underground conduits D) In wall cavities Answer: B Explanation: Only plenum-rated cables may be installed in spaces used for environmental air circulation due to fire hazard concerns. Question 22. What is a primary purpose of securing and supporting cables, as required by NEC Chapter 3? A) For appearance B) To prevent physical damage and maintain system integrity C) To help with wire pulling D) For cable color coding Answer: B Explanation: Proper securing and supporting protects cables from damage and ensures system longevity. Question 23. What is the minimum separation distance between Class 2/3 cables and power conductors? A) No separation required
Specialty Exam
B) As specified by the NEC, typically 2 inches or barrier separation C) 12 inches D) 3 feet Answer: B Explanation: NEC requires Class 2/3 cables to be separated from power conductors by at least 2 inches or by a physical barrier. Question 24. When are abandoned communication cables required to be removed? A) Whenever convenient B) During renovations or new installations C) Every 5 years D) Never Answer: B Explanation: The NEC requires removal of abandoned cables during renovations or new cabling installations to reduce fire loads. Question 25. What is the listing requirement for communication cables installed in risers? A) CMP B) OFNP C) CMR D) CL2X Answer: C Explanation: CMR (riser-rated) cables are required for vertical runs in building risers. Question 26. What is the key difference between Class 1, Class 2, and Class 3 circuits? A) Color of insulation B) Voltage and power limitations, and associated safety requirements C) Use of metallic raceways only
Specialty Exam
Question 30. Which type of optical fiber cable is required for installation in a plenum space? A) OFNP B) OFNR C) CMX D) THHN Answer: A Explanation: OFNP (Optical Fiber Nonconductive Plenum) is required for plenum installations due to superior fire resistance. Question 31. What is required when installing conductive optical fiber cables? A) No additional requirements B) Proper grounding and bonding C) Use only in risers D) Use only in exterior locations Answer: B Explanation: Conductive optical fiber cables must be properly grounded and bonded to prevent electrical hazards. Question 32. What is a primary protector in communication systems required to do? A) Increase bandwidth B) Limit voltage surges at the point of entry C) Reduce cable length D) Provide color coding Answer: B Explanation: Primary protectors safeguard equipment and people from voltage surges, typically at the building’s cable entrance. Question 33. Where must a primary protector for communication circuits be installed?
Specialty Exam
A) As close as practicable to the point of entrance B) Anywhere in the building C) Next to the main panel D) In the attic Answer: A Explanation: For maximum surge protection, the NEC requires the primary protector to be as close as possible to where the cable enters the building. Question 34. What is the minimum AWG size for a communication system grounding conductor? A) 18 AWG B) 14 AWG C) 12 AWG D) As specified by the equipment manufacturer, but often 14 AWG minimum Answer: D Explanation: The NEC allows the equipment manufacturer's specifications, but generally not smaller than 14 AWG. Question 35. When installing overhead communication cables, what clearance must be maintained from electric power lines? A) 6 inches B) 12 inches C) As specified by the NEC, typically 12 inches minimum clearance D) No clearance required Answer: C Explanation: NEC Article 800 specifies minimum clearances to prevent contact and electrical hazards. Question 36. What is a requirement for communication cables entering a building? A) No special requirements B) Must be properly supported and protected against physical damage
Specialty Exam
Answer: C Explanation: Only cables listed for riser or plenum use are permitted for vertical runs in riser spaces. Question 40. What is required when installing communication cables in horizontal runs above drop ceilings? A) Nothing special B) Use of plenum-rated cable if the space is an environmental air plenum C) Any cable type is permitted D) Paint cables to match ceiling Answer: B Explanation: Plenum-rated cables are required in any air-handling spaces above ceilings. Question 41. What does “abandoned cable” mean under the NEC? A) Cable in use B) Cable not terminated at both ends and not identified for future use C) Cable in conduit D) Cable with a broken jacket Answer: B Explanation: Abandoned cable is defined as not connected at both ends and not tagged for future use. Question 42. Which NEC article covers Community Antenna Television (CATV) and radio distribution systems? A) Article 800 B) Article 820 C) Article 725 D) Article 770 Answer: B Explanation: Article 820 addresses CATV/coaxial cable systems.
Specialty Exam
Question 43. What is a requirement for grounding CATV coaxial cables? A) No grounding B) Ground the outer conductive shield C) Only ground the inner conductor D) Use only non-metallic cables Answer: B Explanation: The coaxial cable's outer shield must be grounded to reduce the risk of electrical surges and lightning. Question 44. What minimum clearance is required for CATV cables from power conductors? A) 2 inches B) 6 inches C) As specified by code, usually 2 inches or a barrier D) No clearance required Answer: C Explanation: Minimum clearance is specified to prevent electrical hazards between CATV and power wiring. Question 45. What is the main difference between network-powered broadband systems and premises- powered broadband systems? A) Cable color B) Source of power: network-powered uses external supply, premises-powered uses building wiring C) Cable diameter D) None Answer: B Explanation: The power source distinguishes these two systems. Question 46. What is a principal safety requirement for network-powered broadband systems?
Specialty Exam
D) A sprinkler head Answer: B Explanation: Fire stopping restores the fire resistance of walls, floors, and ceilings that are penetrated by cables. Question 50. What is required for cable penetrations of fire-rated assemblies? A) Only labeling B) Use of approved fire-stopping materials and techniques C) Use of metal conduit only D) Painting the cable red Answer: B Explanation: Cables must be sealed with approved fire-stopping methods to maintain fire resistance. Question 51. What is the purpose of plenum-rated cable? A) For use in underground ducts B) To limit smoke and flame spread in air-handling spaces C) For color coding D) For outdoor installations only Answer: B Explanation: Plenum-rated cables are designed to meet strict fire and smoke requirements for air- handling spaces. Question 52. What is required for limited energy cables installed in environmental air ducts? A) Only labeling B) Must be plenum-rated as per NEC 300. C) Use of riser-rated cable is sufficient D) No requirements Answer: B
Specialty Exam
Explanation: Only cables listed for plenum use are permitted in environmental air ducts. Question 53. What is a telecommunications bonding backbone (TBB)? A) A cable tray B) A conductor for bonding telecommunications infrastructure C) A type of cable jacket D) A building’s main power feeder Answer: B Explanation: The TBB is a bonding conductor that ensures telecommunications equipment is at the same electrical potential. Question 54. What is required for metallic cable trays installed for limited energy cabling? A) No requirements B) Must be grounded and bonded C) Only painted D) Use only for power wiring Answer: B Explanation: Metallic trays must be bonded and grounded to prevent potential differences and ensure safety. Question 55. What is the maximum cable fill for a raceway, as per NEC Chapter 3? A) 10% B) 40% of the cross-sectional area C) 100% D) No limit Answer: B Explanation: The maximum fill for most raceways is 40% to prevent overheating and facilitate cable installation.
Specialty Exam
C) Only tape is needed D) May be left exposed Answer: B Explanation: Cables must terminate in listed enclosures to protect connections and maintain code compliance. Question 60. What is the minimum bend radius for communication cables? A) No minimum B) As specified by the manufacturer or NEC, often 4 to 10 times the cable diameter C) 1 inch for all cables D) 12 inches Answer: B Explanation: Cables must not be bent tighter than the specified radius to prevent damage and signal loss. Question 61. What is a requirement for securing communication cables in vertical risers? A) Secure at intervals not exceeding 4.5 feet B) Only at the top of the run C) Only at the bottom of the run D) No securing required Answer: A Explanation: Vertical runs must be supported at intervals as required by code to prevent sagging and damage. Question 62. What is the purpose of using a cable certifier? A) For labeling B) To verify the performance and integrity of communication cabling C) To paint the cables D) Only for power wiring
Specialty Exam
Answer: B Explanation: Cable certifiers test and verify that installed cabling meets specified performance standards. Question 63. What tool is commonly used to trace communication cabling? A) Hammer B) Tone generator and probe C) Paint brush D) Cable tie Answer: B Explanation: Tone generators and probes help technicians locate and identify communication cables. Question 64. What is the function of a continuity tester? A) To test for cable color B) To verify electrical continuity in cabling C) To measure cable diameter D) To secure cables Answer: B Explanation: Continuity testers check for unbroken electrical paths in cables. Question 65. What is the main requirement when using lockout/tagout (LOTO) procedures for limited energy systems? A) No need to lockout limited energy systems B) Prevent accidental energization to protect workers during service C) Only for high-voltage systems D) Only for power systems Answer: B Explanation: LOTO is used to ensure that systems are de-energized and cannot be accidentally started during servicing.
