Arizona Contractor License – Low Voltage Communication Systems (CR-67) Practice Exam

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• Class 2 equipment is often called what?
• When installing a DC system, is a grounding electrode system with a grounding electrode conductor required?
• What is the minimum separation in inches required between supply service drops of max 750 volts and communications service drops?
• What defines a Class 2, Division 2 location?
• What is the maximum flame spread distance for fire-resistant cables?
• What should support cables in a low voltage configuration?
• What type of cables are suitable for installation in vertical riser shafts without conduit?
• What is the maximum allowed power for a power-limited Class 1 source?
• What type of fault occurs when electrical current unintentionally flows to the ground?
• What type of protection is recommended for aerial communications conductors?
• How many years of verifiable experience is required for the C12 license in Arizona?
• Which of the following is NOT a valid type of conduit?
• How should cables and conductors of Class 2 and Class 3 circuits be placed with respect to electric light conductors?
• The fire alarm circuit disconnect should have what feature?
• In the context of communications wiring, what does “service loop” refer to?
• What does CL2 and CL3 classify in low voltage communication systems?
• What kind of current does a Ground Fault Circuit Interrupter respond to?
• What is the maximum voltage limit for Class 1 signaling and remote control circuits?
• Which of the following is true regarding RHW-2 wires?
• What is an effective Ground-Fault current path?
• What is the voltage measured between any two line conductors of a balanced three-phase system?
• Should medium-power network-powered broadband communications cables be allowed to stay in the same cable tray with Class 2 and Class 3 remote-control circuits?
• What is the highest acceptable voltage limit for Class 1 circuits?
• What color should the identification of the fire alarm circuit disconnecting means be?
• A lighting system with an isolating power supply must operate at _____ volts peak to be considered low voltage.
• What does amplitude refer to in electrical signals?
• What must be ensured when installing Class 1 circuits with adjacent power supply circuits?
• Can FPL cables be used for general purpose alarms without conduit? If yes, are there any exceptions?
• What should be done with any accessible portion of abandoned Class 2 cables?
• What is the maximum voltage that a Class 1 Remote-Control and Signaling Circuit should never exceed?
• How is the frequency of Alternating Current (AC) measured?
• What is the minimum separation distance between network-powered broadband communications cable and any lightning conductors?
• To ensure safety, Class 2 circuits should avoid risks of what?
• True or False: Hot water pipes may be used as grounding electrodes for the protectors.
• What is a characteristic of liquid-tight flexible metal conduit (LFMC)?
• Which article specifically covers premises-powered broadband communications systems?
• An insulated grounded conductor which is what gauge or below should be identified by a continuous white or gray outer finish?
• What is a key requirement for cables designed to produce low smoke?
• Are copper conductors the only type that can be used for fire alarm systems?
• How should an interbuilding circuit be protected in areas prone to lightning exposure?
• Does Alternating Current (AC) always flow one way then the other?
• What wiring methods must be used when mixing Class 2 conductors with Class 3 conductors?
• At what height should communication cables maintain clearance above the points they pass?
• What is commonly used to protect circuits from ground faults?
• What is the correct definition of a power-limited circuit?
• How is thermal resistivity important in low voltage communication systems?
• What is the primary function of an Intermediate Distribution Frame (IDF)?
• What type of receptacles should be used in electrical installations according to OSHA?
• Where should communications wires and cables be located in relation to electric light or power conductors?
• Which class of circuit permits a higher voltage than a Class 2 circuit?
• What type of conduit is described as a metal thin-walled conduit?
• What is true about fast-blow fuses?
• Which type of cables should be used for medium-power network-powered broadband communication circuits located outside a building?
• What is the minimum receptacle rating that should be used in kitchens where portable appliances will be deployed, even in a low voltage configuration?
• How long should an unlisted outside plant cable be limited to, in feet?
• What is the minimum rating for overcurrent protection on a 16 AWG conductor?
• Which of the following is NOT considered in low voltage system installations?
• Is placing power cords or wires under carpets or rugs considered safe practice?
• According to OSHA, what is the minimum size for single conductors used as equipment grounding conductors?
• Can circuits of 40A be used for fixed lighting with heavy-duty lamp holders in cooking appliances?
• What protection level must Class 1 Power Sources have from overcurrent devices?
• What is the maximum pulling tension in pounds allowed for copper wire?
• What is the primary purpose of surge protective devices in low voltage communication systems?
• What type of wires use rubber insulation that is high heat resistant and is only suitable for dry locations?
• What measures the heat transfer capability through a substance by conduction?
• Voltage drop can be calculated using which of the following formulas?
• What is the key safety consideration for Class 3 circuits in low voltage communication?
• Concerning fire alarm systems, the overcurrent protection should not exceed ______ amperes for 16 AWG conductors.
• In laundries, what is the minimum receptacle rating required for deploying portable appliances in a low voltage configuration?
• Which type of wires use rubber insulation but are suitable for wet locations?
• What is required for Class 1 circuit conductors and power-supply conductors that are not functionally associated?
• Are Class 1 circuit conductors typically allowed to be tapped?
• Network-powered broadband communications cables attached to the building structure should be protected by raceway if located within how many feet of finished grade?
• What is the requirement for open conductors according to OSHA?
• What is the minimum headroom required in a typical workspace for a working voltage under 600V?
• When a circuit poses a direct life safety hazard, it must be classified as what?
• A bonding jumper at least ______ AWG copper in size should be used to connect the network-powered broadband communications system grounding electrode with the power grounding electrode system.
• What is the purpose of a bonding jumper in a broadband communications system?
• What type of conductors are preferred for making terminations, splices, or taps within a raceway?
• How should raceways or bushings that enter a building be positioned?
• Which of the following describes a Class 2, Division 1 location?
• What refers to the allowable current-carrying capacity of a conductor?
• What is the voltage limitation for Class 2 circuits?
• When using a dry cell battery as a power source for a Class 2 system, what must the voltage be?
• What is the minimum gauge for bonding conductors used with primary protectors?
• What type of cables can be used inside walls, ceilings, or under the floor?
• Before cable conductors are terminated, they must first be tested for what?
• Under what condition can Class 1 circuits occupy the same cable?
• Conductor sizes are often expressed in which format?
• What is the maximum voltage that audio systems can reach?
• Which device converts optical signals into component signals such as voice, audio, video, and data?
• What voltage rating do secondary protectors need to be compatible with when used on circuits exposed to electric light conductors?
• What is the minimum distance recommended between communications wires and lighting conductors?
• How many wall switch-controlled lighting outlets are required in every habitable room?
• Cables and conductors of Class 3 circuits should be placed with which type of circuits?
• Are bends in network broadband cable ever allowed?
• What is the proper installation method for communications wires entering a building with a primary protector?
• Which standard outlines the requirements for Class 2 and Class 3 conductors?
• What type of conduit offers less protection but is easier to work with?
• What type of cable is acceptable for conducting power-supply and fire alarm circuits together?
• Why should network-powered broadband cables be installed in hollow spaces?
• Is it true that a GFCI is sensitive to small leaks of current?
• Can cable tray systems be used in hoist ways, according to OSHA regulations?
• What is the required rating for a service disconnect?
• A cable that is fire resistant should exhibit a maximum flame spread distance of no more than how many feet?
• What key factor differentiates Class 2 circuits from Class 1 circuits?
• What is the maximum amperage for overcurrent protection on 16 AWG conductors?
• What is the maximum peak optical density allowed for a low smoke-producing cable?
• A ground electrode conductor originates at what location in the service panel?
• A Class _____ Circuit operates between the load side of a Class 2 power source and connected equipment.
• Can branch circuits supplying fire alarm equipment be used to supply other loads?
• What type of cable compartment should not include Class 3 circuits?
• What type of protection is necessary for aerial network-powered broadband communications conductors?
• Which type of conduit is often used for installations requiring flexibility in tight spaces?
• What is Imax in the context of low voltage communication systems?
• Metal conduit can technically act in place of what?
• You should size conductors no less than which percentage of the continuous loads plus what percentage of the non-continuous loads?
• In an assembled cable with jacketing, insulation for each individual conductor must be rated for at least _____ volts.
• Does the amount of bond required in Arizona depend on the type of license and experience?
• What should be done if Class 2 cables are found to be abandoned?
• Which of the following statements regarding branch circuits for fire alarm systems is true?
• Which of the following best describes Class 1 circuits?
• Can Class 2 and Class 3 circuits be installed with Class 1, non-power-limited fire alarm circuits?
• Are Class 1 Remote-Control and Signaling Circuits required to have limited power output?
• An area experiencing how many thunderstorm days or less per year is exempt from lightning exposure concerns?
• What is the minimum vertical clearance for communications cables at the roof?
• Is it necessary to gather all drawings prior to performing any electrical installations, according to federal law?
• What is the smallest wire size permitted on a Class 1 circuit?
• What must all communication cable bundles utilize when penetrating rated walls?
• What is the maximum nominal output voltage for non-power limited fire alarm circuits?
• True or False: You do not need to provide primary electrical protection for network-powered broadband communications conductors that are not exposed to lightning.
• In which scenario can Class 1 circuits share a cable with power supply circuits?
• Standard lampholders with a rating less than what wattage should not be used for a low voltage configuration?
• What does the term 'raceway' refer to?
• To operate Class 2 conductors, what is required?
• What specific characteristic defines the insulation of THWN wires?
• What is a common use for Class 3 circuits in low voltage systems?
• Which of the following is NOT characteristic of Class 1 circuits?
• What does VAmax refer to in low voltage communication systems?
• How does an isolating power supply prevent danger in electrical systems?
• When must the construction of a Main Distribution Frame (MDF) be completed?
• What is the primary material used in the construction of EMT conduit?
• Cables installed in building locations for environmental air that are not in plenums may be what type?
• What is the return path for electrical power to flow back to the service panel?
• What is a characteristic of flexible conduit?
• What type of grounding is required for a supply transformer of a 50V or lower system when sourced over 150V to ground?
• What is required for communication cable bundles when they pass through fire-rated walls?
• A Class 1, Division 1 location is characterized by what?
• Who administers the licensing in Arizona?
• Which device extends the community antenna television system from the service provider to the customer equipment?
• What does it mean for circuits to be functionally associated?
• Which voltage measurement is primarily associated with the line side of a three-phase system?
• What is the minimum size of conductors that should be used in multi-conductor cables?
• What is true regarding Class 2 circuits and transformers?
• A Class 1 Circuit is defined as being between which two points?
• What is the maximum voltage for telephone systems with a ringer?
• Is the live wire always ungrounded?
• What is the minimum overhead span height for network-powered broadband communications cables above the sidewalk?
• Does grounding and bonding mean the same thing?
• For both power-limited and non-power-limited circuits, what can be used to protect against electrical surges?
• Which of the following statements is correct about conductor sizing?
• When installing surge protective devices, which NEC article must be followed?
• What identifying feature is required for circuit disconnecting means in fire alarm systems?
• Which type of cables are most appropriate for damp areas?
• Article 720 covers circuits and equipment that operate at what voltage or less?
• What is the purpose of overcurrent protection in fire alarm systems?
• The term "ampacity" is important primarily for which reason?
• What is the maximum earth resistivity in ohmmeters for an area to be exempt from lightning exposure?
• A flexible cord of 2 or more conductors may be treated as a single conductor for the purpose of?
• According to OSHA, bare conductors should not be used for which type of circuits?
• What type of conduit is circular and made of metal?
• What occurs if communications wires are attached to a cross-arm carrying electrical conductors?
• In which scenario is primary electrical protection required on network-powered broadband communications conductors?
• What is the first action you should take when someone has suffered an electric shock?
• In what units is thermal resistivity typically expressed?
• What is a short circuit?
• Should overcurrent devices generally be interchangeable with devices of higher ratings?
• What type of equipment is typical for Class 2 circuits?
• Which wiring method is typically required for Class 3 circuits?
• Is it true that a Class 3 circuit considers safety from a fire initiation standpoint?
• True or False: Direct-buried cables that are emerging from the ground must be protected by enclosures or other means.
• A separately derived system may refer to which of the following?
• What is the maximum allowed amperage for overcurrent protection on 18 AWG conductors in fire alarm systems?
• Can only plastic splice cases be used as enclosures for terminating telephone cables?
• What type of protection is required for underground network-powered broadband communications conductors?
• What is the minimum size for single conductors in fire alarm systems?
• Should direct-buried network-powered broadband communications cables be separated from conductors of any non-power limited fire alarm circuits?
• Which of the following statements about plastic splice cases is true?
• What size AWG copper bonding jumper should be used to connect the network-powered broadband communications system grounding electrode with the power grounding electrode system?
• Which conduit type is typically used for emergency lighting circuits?
• What type of cable should be used for installations in ducts for environmental air?
• What describes the voltage measured across any one component of a balanced three-phase system?
• Is it true that Class 2 circuits must be kept separate from lighting?
• Under what condition may electricity flow?
• Under what condition can Class 1 circuits and power-supply circuits be in the same raceway?
• Can cables and conductors of Class 2 circuits be placed in a cable compartment with conductors of non-power-limited fire alarm circuits?
• Where must the branch-circuit overcurrent protective device for fire alarm equipment be identified?
• In what configuration should communications wires and cables be kept below?
• Which aspect is important for ensuring safety in installations using FPL cables?
• Can Class 2 and Class 3 conductors be run together?
• How many hot wires typically run from the utility company into the service panel?
• Can Class 2 and Class 3 circuits share a cable tray?
• What is the minimum conductor size for a low voltage configuration?
• A Class 2 circuit can have a maximum voltage of which of the following?
• Remote-control circuits for safety-control equipment are considered Class _____ if failure to operate poses direct fire or life hazards.
• How do watts compare to voltage?
• Only which type of terminal boxes should be used for splicing telephone cables?
• Under what condition should communications wires not be attached to a cross-arm?
• Does NEC require that Class 2 and Class 3 circuits be installed in a raceway?
• Are circuits of 30A permitted to serve fixed lighting units with heavy-duty lamp holders in non-dwelling units?
• What defines the maximum capabilities of a Class 1 Remote-Control circuit?
• Why should solid conductors be avoided for flexible connections?
• What type of cables are suitable for installation in environmental air plenum spaces without the need for conduit?
• Should a ground electrode be in contact with the earth?
• Which type of wire is often used in residential wiring applications?
• Secondary protectors should be used on circuits exposed to potential contact with electric conductors above what voltage?
• What serves as the area of demarcation between intra-building and inter-building cabling?
• Where should a primary protector be located in relation to where the cable enters the building?
• What is true about the conductors of power-supply and fire alarm circuits when placed in the same cable?
• What is a characteristic of a Class 1 enclosure?
• Which of the following best describes the usage of metal boxes with conduit?
• What must be true for a Class 1 enclosure?
• When pulling three conductors cables into a raceway, jamming may occur when the ratio of the inside diameter of the raceway to the outside diameter of the cable is in the range of?
• Are fuseluse-type primary protectors allowed?
• Is it acceptable to use a junction box for encapsulating a 120V AC wire connection to a 12-24V DC power converter?
• What should be marked on the fire alarm control panel?
• What type of cables is recommended for low-power network-powered broadband communication circuits outside of a building?
• What requirement applies to multiconductor cable exposed to direct sunlight according to OSHA?
• Which class of circuits considers safety mainly from a fire initiation standpoint?
• What term refers to the ability of a voltage to convey information?
• What is a reason for constructing effective Ground-Fault current paths?
• For appliance branch circuits supplying more than one appliance, what is the minimum conductor size for a low voltage configuration?
• What does THWN stand for?
• What is the implication of jamming when pulling too many conductors into a raceway?
• Which of the following describes Class 3 conductors?
• What happens when the cable bend radius exceeds specifications for broadband cables?
• What does the breaking capacity of a fuse specify?
• Which statement is incorrect regarding Class 1 circuits?
• What is one of the key installation requirements for Class 2 circuits?
• True or False: PVC conduit can hold many wires.
• What effect can accidental contact with underground wiring have when digging?
• True or False: Hot water pipes may be used as grounding electrodes for the protectors.
• What is the maximum rated output for Class 1 Power-Limited Circuits?
• What is the maximum allowable overcurrent protection in amperes for 18 AWG conductors?
• Does the insulation type determine where cables can be used?
• What acts as the demarcation point for voice, data, and video communications?
• What term refers to an unintentional mess up in electrical systems?
• What is the primary characteristic of Class 2 conductors?
• What does Imax refer to in low voltage communication systems?
• What is Class 1, Division 1 equipment commonly referred to as?