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NJ Fire Alarm practice questions

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Question 1National Electrical Code (NFPA 70) requirements for fire alarm circuits

Under NFPA 70, which conductor color identification is required for the grounded conductor of a fire alarm circuit?

  1. Black
  2. Red
  3. White or natural gray Correct answer.
  4. Green

Explanation

Article 250 and 310 of the NEC require the grounded (neutral) conductor to be identified with white or natural gray finish. Green is reserved for equipment grounding conductors, and red or black typically identify ungrounded circuit conductors. Fire alarm installers must maintain this separation so the grounded conductor is never confused with a grounding conductor.

Question 2National Electrical Code (NFPA 70) requirements for fire alarm circuits

Which NEC article specifically covers the installation requirements for fire alarm systems, including their power supplies and circuits?

  1. Article 760 Correct answer.
  2. Article 725
  3. Article 770
  4. Article 700

Explanation

Article 760 governs fire alarm systems, covering power supplies, circuits, and wiring methods for both non-power-limited and power-limited fire alarm circuits. Article 725 covers Class 1, 2, and 3 remote-control and signaling circuits that are not fire alarm. Article 700 addresses emergency systems, and Article 770 covers optical fiber cables.

Question 3National Electrical Code (NFPA 70) requirements for fire alarm circuits

Non-power-limited fire alarm circuit conductors are required to be installed using which wiring method?

  1. Loose conductors in a ceiling void
  2. Listed plenum cable only
  3. Any Class 2 cable
  4. A Chapter 3 wiring method Correct answer.

Explanation

NEC Article 760 requires non-power-limited fire alarm circuit conductors to be installed using wiring methods recognized in Chapter 3, such as raceways, metal-clad cable, or armoured cable. Power-limited fire alarm circuits have more flexible cable options under Article 760 Part III. Free conductors in a ceiling void are never an acceptable wiring method.

Question 4National Electrical Code (NFPA 70) requirements for fire alarm circuits

Which color identification is required for equipment grounding conductors of a fire alarm system?

  1. White
  2. Orange
  3. Green or green with yellow stripes Correct answer.
  4. Blue

Explanation

The NEC requires equipment grounding conductors to be identified by a green finish or green with one or more yellow stripes. This identification is distinct from the white or gray used for grounded conductors. Using the correct color prevents accidental interconnection of grounding and grounded conductors.

Question 5National Electrical Code (NFPA 70) requirements for fire alarm circuits

What is the maximum overcurrent protection permitted for the fire alarm control unit branch circuit supplying a non-power-limited fire alarm system?

  1. 30 amperes
  2. 15 amperes
  3. The rating marked on the listed control unit Correct answer.
  4. 20 amperes

Explanation

Article 760 requires the branch circuit supplying a fire alarm control unit to be protected at the rating marked on the listed equipment. The manufacturer's listing governs the maximum overcurrent protection, not a fixed ampere value. Installing a larger breaker than marked could damage the control unit and violate its listing.

Question 6National Electrical Code (NFPA 70) requirements for fire alarm circuits

Which class of fire alarm circuit is defined as a circuit that is monitored for open and ground faults but not for short circuits?

  1. Class C
  2. Class B Correct answer.
  3. Class A
  4. Class D

Explanation

Class B circuits are monitored for opens and grounds but do not require the circuit to survive a single short circuit. Class A circuits must continue to operate during a single open or ground fault. Class C and Class D designations describe different performance criteria and are not the open/ground-only case.

Question 7National Electrical Code (NFPA 70) requirements for fire alarm circuits

According to Article 760, which cables are permitted for power-limited fire alarm circuits in a plenum space?

  1. Any listed cable
  2. FPLR
  3. FPLP Correct answer.
  4. FPL

Explanation

FPLP cable is specifically listed for use in plenum spaces because of its low smoke and flame characteristics. FPLR is rated for risers, and FPL is for general use, neither of which is permitted in a plenum. The NEC requires the plenum-rated cable to be used where the space is used for environmental air.

Question 8National Electrical Code (NFPA 70) requirements for fire alarm circuits

Fire alarm circuit conductors must be separated from conductors of other systems unless they are separated by which of the following?

  1. A grounded metal raceway Correct answer.
  2. A listed barrier
  3. A continuous raceway of nonmetallic material
  4. A distance of 2 inches

Explanation

Article 760 requires fire alarm conductors to be separated from other circuit conductors, and a grounded metal raceway provides that separation. The metal enclosure also provides physical protection and grounding. A nonmetallic raceway alone does not establish the required separation.

Question 9National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm control unit has a marked branch circuit rating of 15 amperes. What protection must be provided for this branch circuit?

  1. A 20-ampere breaker
  2. A 15-ampere breaker Correct answer.
  3. A breaker sized at 125 percent of the marked rating
  4. A 30-ampere breaker

Explanation

The branch circuit supplying a fire alarm control unit must be protected at the rating marked on the listed equipment. If the unit is marked 15 amperes, the branch circuit overcurrent device must not exceed that value. Oversizing the breaker violates the listing and can damage the unit.

Question 10National Electrical Code (NFPA 70) requirements for fire alarm circuits

A power-limited fire alarm circuit uses FPLR cable in a riser. Which additional condition must be met for this installation?

  1. The cable must be supported every 12 inches
  2. The cable must be protected by a 15-ampere breaker
  3. The cable must be listed for the purpose and installed per Article 760 Correct answer.
  4. The cable must be installed in a raceway

Explanation

Power-limited fire alarm cables must be listed for the purpose and installed in accordance with Article 760 requirements. FPLR is a riser-rated cable suitable for vertical runs in risers, and the listing covers its intended use. Raceway installation is not required for power-limited cables, and support spacing does not change the listing requirement.

Question 11National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm system is installed in a building where the ceiling is a suspended ceiling used as an environmental air plenum. Which cable type is required for the fire alarm circuits in that space?

  1. FPLP Correct answer.
  2. Any of the above
  3. FPLR
  4. FPL

Explanation

A space used for environmental air is a plenum, and Article 760 requires FPLP cable for fire alarm circuits installed in plenum spaces. FPL and FPLR are not listed for plenum use because of their smoke and flame characteristics. Using the proper plenum cable reduces the risk of toxic smoke distribution through the building.

Question 12National Electrical Code (NFPA 70) requirements for fire alarm circuits

A Class A fire alarm circuit is required to remain operational during a single open circuit. Which installation practice best satisfies this requirement?

  1. Providing a redundant return path so the circuit survives an open Correct answer.
  2. Grounding the circuit at both ends
  3. Using only FPL cable
  4. Installing the circuit in a single continuous run

Explanation

Class A circuits must continue to operate during a single open or ground fault, which is achieved by providing a redundant path back to the control unit. This allows the circuit to remain functional even when one conductor is opened. A single continuous run has no redundancy and would fail under an open.

Question 13National Electrical Code (NFPA 70) requirements for fire alarm circuits

A non-power-limited fire alarm circuit is installed in a raceway shared with a 120-volt branch circuit. What is the primary NEC concern with this installation?

  1. The fire alarm conductors must be separated from the power conductors by a barrier or metal raceway Correct answer.
  2. The fire alarm circuit must be Class 2
  3. The power circuit must be de-energized during a fire
  4. The fire alarm conductors must be larger than the power conductors

Explanation

Article 760 requires fire alarm circuit conductors to be separated from conductors of other systems to prevent fault energy from transferring between systems. A barrier or grounded metal raceway provides that separation. Conductor sizing and de-energization are not the governing concern for mixed raceway installations.

Question 14National Electrical Code (NFPA 70) requirements for fire alarm circuits

Which of the following best describes the requirement for identifying fire alarm circuit conductors at terminal points?

  1. Conductors must be identified at terminal points and at junctions Correct answer.
  2. Conductors must be identified only where they enter a raceway
  3. Conductors must be tagged only at the control unit
  4. Conductors must be color-coded only

Explanation

Article 760 requires fire alarm circuit conductors to be identified at terminal points and at junctions so that the circuit can be traced and maintained. Identification at only one location is insufficient for troubleshooting and maintenance. Proper identification also helps prevent accidental misconnection during service.

Question 15National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm control unit is supplied by a branch circuit protected by a 20-ampere breaker, but the unit is marked for a maximum of 15 amperes. What is the correct action?

  1. Leave the 20-ampere breaker because the unit is listed
  2. Replace the breaker with a 15-ampere device Correct answer.
  3. Add a second 20-ampere breaker
  4. Increase the conductor size to 10 AWG

Explanation

The branch circuit overcurrent device must not exceed the rating marked on the listed fire alarm control unit. If the unit is marked 15 amperes, the 20-ampere breaker must be replaced with a 15-ampere device. Oversizing the breaker can damage the unit and violates the listing.

Question 16National Electrical Code (NFPA 70) requirements for fire alarm circuits

Which condition is required for a fire alarm circuit to be classified as power-limited?

  1. The circuit must be Class A
  2. The circuit must be supplied by a listed power-limited source Correct answer.
  3. The circuit must use FPLP cable
  4. The circuit must be installed in a raceway

Explanation

A power-limited fire alarm circuit must be supplied by a listed power-limited source, such as a listed control unit output. The power limitation is defined by the source characteristics, not by the wiring method or circuit class. Raceway installation and cable type are separate considerations.

Question 17National Electrical Code (NFPA 70) requirements for fire alarm circuits

During a fire alarm system inspection, an installer finds that the fire alarm circuit conductors share a raceway with a 480-volt feeder. Which NEC requirement has been violated?

  1. Fire alarm conductors must be installed in conduit
  2. Fire alarm conductors must be Class 2
  3. Fire alarm conductors must be separated from other system conductors Correct answer.
  4. Fire alarm conductors must be red

Explanation

Article 760 requires fire alarm circuit conductors to be separated from conductors of other systems to prevent fault energy from transferring between systems. Sharing a raceway with a 480-volt feeder violates this separation requirement. Conduit installation and conductor color are separate issues.

Question 18National Electrical Code (NFPA 70) requirements for fire alarm circuits

Which of the following is the correct minimum size for the equipment grounding conductor of a fire alarm control unit branch circuit protected at 20 amperes, when the conductors are copper?

  1. 20 AWG
  2. 14 AWG Correct answer.
  3. 18 AWG
  4. 16 AWG

Explanation

Table 250.122 requires a copper equipment grounding conductor of at least 14 AWG for a 20-ampere overcurrent device. Smaller sizes such as 16, 18, and 20 AWG are not permitted for equipment grounding conductors in this application. The grounding conductor must be sized to carry fault current safely.

Question 19National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm system uses a Class B circuit. Which fault condition must the circuit be monitored for under Article 760?

  1. Short and open faults only
  2. Ground faults only
  3. Short and ground faults only
  4. Open and ground faults Correct answer.

Explanation

Class B circuits are monitored for open and ground faults, but they are not required to survive a short circuit. Monitoring for opens and grounds allows the control unit to annunciate a trouble condition. Short circuit survivability is associated with Class A circuits.

Question 20National Electrical Code (NFPA 70) requirements for fire alarm circuits

An installer is running power-limited fire alarm cable in a building with a return-air plenum ceiling. Which cable marking should be selected?

  1. FPL
  2. FPLP Correct answer.
  3. FPLR
  4. CM

Explanation

A return-air plenum requires plenum-rated cable, and FPLP is the fire alarm cable listed for plenum spaces. FPLR is for risers, FPL is general purpose, and CM is a communications cable not intended for fire alarm circuits. Selecting FPLP ensures compliance with Article 760 plenum requirements.

Question 21National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm control unit is marked with a maximum branch circuit protection of 20 amperes and is supplied by a 20-ampere breaker. The electrician wants to add a 30-ampere breaker to accommodate a larger conductor. What is the correct response?

  1. The 30-ampere breaker is not permitted because it exceeds the marked rating Correct answer.
  2. The 30-ampere breaker is permitted if the conductor is upsized
  3. The 30-ampere breaker is permitted if the unit is power-limited
  4. The 30-ampere breaker is permitted if the circuit is Class A

Explanation

The branch circuit overcurrent device must not exceed the rating marked on the listed fire alarm control unit. A 30-ampere breaker exceeds the marked 20-ampere maximum and is not permitted, regardless of conductor size or circuit class. The listing governs the maximum protection level.

Question 22National Electrical Code (NFPA 70) requirements for fire alarm circuits

A designer specifies a Class A fire alarm circuit for a high-rise building. Which installation feature is essential to meet the Class A survivability requirement?

  1. A redundant path that maintains operation during a single open or ground fault Correct answer.
  2. FPLP cable throughout the building
  3. A single continuous conductor run with no junctions
  4. A dedicated 20-ampere branch circuit

Explanation

Class A circuits must remain operational during a single open or ground fault, which requires a redundant path back to the control unit. A single continuous run without redundancy would fail under an open. Dedicated branch circuits and plenum cable address other requirements and do not provide survivability.

Question 23National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm circuit is installed in a raceway that also contains conductors of a different fire alarm system supplied by a separate control unit. Which NEC principle applies to this installation?

  1. All fire alarm conductors may share a raceway without restriction
  2. Fire alarm conductors of different systems must be separated unless a barrier or metal raceway provides isolation Correct answer.
  3. Only power-limited circuits may share a raceway
  4. Only Class A circuits may share a raceway

Explanation

Article 760 requires separation between fire alarm circuit conductors and conductors of other systems to prevent fault energy transfer. A barrier or grounded metal raceway can provide the necessary isolation. Sharing a raceway without such separation is not permitted, regardless of circuit class or power limitation.

Question 24National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm control unit is listed for a maximum branch circuit protection of 15 amperes. The installer uses a 20-ampere breaker and 12 AWG conductors. Which statement best describes the compliance status?

  1. Compliant because the unit is power-limited
  2. Noncompliant because the breaker exceeds the marked rating Correct answer.
  3. Noncompliant because 12 AWG conductors are too small
  4. Compliant because 12 AWG conductors can carry 20 amperes

Explanation

The overcurrent device must not exceed the rating marked on the listed fire alarm control unit, so a 20-ampere breaker on a unit marked 15 amperes is noncompliant. Conductor ampacity does not override the equipment listing. The correct remedy is to install a 15-ampere breaker.

Question 25National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm system uses a power-limited circuit supplied by a listed control unit. The installer wants to install the cable in a plenum space and in a riser within the same building. Which cable selection satisfies both locations?

  1. FPLP for the plenum and FPLR for the riser Correct answer.
  2. FPL for both locations
  3. FPLR for both locations
  4. FPLP for both locations

Explanation

Plenum spaces require FPLP cable, while risers may use FPLR cable, so selecting FPLP for the plenum and FPLR for the riser satisfies both locations. Using FPL in either location would not meet the specific listing requirements. Using FPLR in a plenum would violate Article 760.

Question 26National Electrical Code (NFPA 70) requirements for fire alarm circuits

Article 760 of the NEC covers which of the following installations?

  1. Emergency lighting systems
  2. Optical fiber cables used for communications
  3. Class 1 remote-control circuits
  4. Fire alarm systems, including circuits and equipment Correct answer.

Explanation

Article 760 provides the requirements for fire alarm systems, including the circuits and equipment that make up the system. It does not cover emergency lighting, communications optical fiber, or Class 1 remote-control circuits, which are addressed in other articles.

Question 27National Electrical Code (NFPA 70) requirements for fire alarm circuits

Which of the following is a recognized method for protecting fire alarm circuit conductors from physical damage?

  1. Installing them in a raceway Correct answer.
  2. Running them through joist holes
  3. Supporting them with insulated staples
  4. Using cable ties every 12 inches

Explanation

The NEC permits fire alarm circuit conductors to be protected from physical damage by installing them in a raceway, among other methods. Cable ties, insulated staples, and running through joist holes do not provide the required physical protection.

Question 28National Electrical Code (NFPA 70) requirements for fire alarm circuits

What is the minimum size of conductor permitted for a non-power-limited fire alarm circuit?

  1. 16 AWG
  2. 18 AWG Correct answer.
  3. 12 AWG
  4. 14 AWG

Explanation

NEC 760.49 permits copper NPLFA circuit conductors as small as 18 AWG when the applicable ampacity, enclosure or raceway, insulation, and protection requirements are met. Thus, 18 AWG is the permitted minimum here. This is distinct from the incoming AC branch circuit supplying a fire alarm control unit.

Question 29National Electrical Code (NFPA 70) requirements for fire alarm circuits

Which of the following is required for a fire alarm circuit to be considered power-limited?

  1. The circuit must be supplied by a listed power-limited fire alarm control unit Correct answer.
  2. The circuit must be protected by a 15-ampere overcurrent device
  3. The circuit must use 14 AWG conductors
  4. The circuit must be installed in a raceway

Explanation

A fire alarm circuit is power-limited only if it is supplied by a listed power-limited fire alarm control unit or a listed power-limited fire alarm power supply. Overcurrent protection size, conductor size, and raceway installation do not by themselves make a circuit power-limited.

Question 30National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm control unit is marked with a maximum branch circuit overcurrent protection of 15 amperes. The branch circuit supplying the unit is protected by a 20-ampere circuit breaker. What does the NEC require?

  1. The control unit must be listed for 20-ampere protection
  2. The 20-ampere breaker is acceptable if the unit is marked for 20 amperes
  3. The 20-ampere breaker is acceptable if the conductors are 12 AWG
  4. The branch circuit must be protected at no more than 15 amperes Correct answer.

Explanation

NEC 760.41(B) requires that the branch circuit supply to a fire alarm control unit be protected at the rating marked on the unit. Since the unit is marked for a maximum of 15 amperes, the 20-ampere breaker is not permitted; the circuit must be protected at 15 amperes or less.

Question 31National Electrical Code (NFPA 70) requirements for fire alarm circuits

Which of the following wiring methods is permitted for fire alarm circuit conductors in a hazardous (classified) location?

  1. Only MI cable
  2. Any wiring method permitted for the hazardous location Correct answer.
  3. Only electrical metallic tubing
  4. Only rigid metal conduit

Explanation

NEC 760.42 requires that fire alarm circuit conductors in hazardous locations be installed using wiring methods suitable for the specific hazardous location. The NEC does not limit the choice to a single method such as rigid metal conduit, EMT, or MI cable.

Question 32National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm system uses a Class B circuit. Which of the following conditions must the circuit be monitored for?

  1. Ground faults only
  2. Short circuits only
  3. Open faults only
  4. Open and ground faults Correct answer.

Explanation

Class B circuits must be monitored for open and ground faults so that a single fault is annunciated. They are not required to be monitored for short circuits, and monitoring only one type of fault would not meet the Class B requirements.

Question 33National Electrical Code (NFPA 70) requirements for fire alarm circuits

Which of the following is a requirement for fire alarm circuit conductors installed in a raceway with conductors of a different system?

  1. They must be color-coded red
  2. They must be supported every 18 inches
  3. They must be derated for temperature
  4. They must be separated by a barrier or installed in a separate raceway Correct answer.

Explanation

NEC 760.139 requires that fire alarm circuit conductors be separated from conductors of other systems by a barrier or by installation in a separate raceway. Color coding, derating, and support spacing do not satisfy the separation requirement.

Question 34National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm circuit is installed in a plenum space. Which cable marking is required for a power-limited fire alarm circuit in this location?

  1. FPLP or FPLR
  2. FPL
  3. FPLR
  4. FPLP Correct answer.

Explanation

NEC 760.179(D) requires that power-limited fire alarm cables installed in ducts, plenums, or other environmental air spaces be listed as plenum-rated, which is marked FPLP. FPLR is riser-rated and FPL is general-purpose; neither is suitable for plenum spaces.

Question 35National Electrical Code (NFPA 70) requirements for fire alarm circuits

What is the minimum size of equipment grounding conductor required for a fire alarm control unit branch circuit?

  1. 12 AWG copper
  2. 18 AWG copper
  3. 14 AWG copper Correct answer.
  4. 16 AWG copper

Explanation

NEC 760.53 requires an equipment grounding conductor for fire alarm control unit branch circuits, and its size must comply with NEC 250.122. For a 15-ampere branch circuit, the minimum equipment grounding conductor is 14 AWG copper.

Question 36National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm control unit is marked with a maximum branch circuit overcurrent protection of 20 amperes and is supplied by a 20-ampere branch circuit. What is the minimum permitted size for its incoming AC branch-circuit copper conductors under ordinary installation conditions?

  1. They must be sized at least 12 AWG Correct answer.
  2. They must be sized at least 14 AWG
  3. They must be sized at least 16 AWG
  4. They must be sized at least 10 AWG

Explanation

For an ordinary 20-ampere incoming AC branch circuit, the small-conductor overcurrent rule requires at least 12 AWG copper. The control unit's maximum overcurrent marking does not permit 14 AWG copper to be protected at 20 amperes. Other installation conditions may require larger conductors.

Question 37National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm system uses a power-limited circuit supplied by a listed control unit. The installer wants to install the circuit conductors exposed in a ceiling plenum. Which of the following is required?

  1. The conductors must be installed in a raceway or be listed as plenum-rated Correct answer.
  2. The conductors must be derated for temperature
  3. The conductors must be supported every 12 inches
  4. The conductors must be color-coded red

Explanation

Power-limited fire alarm circuit conductors installed in a plenum must be protected against physical damage and must be suitable for the environment. This means they must be installed in a raceway or be listed as plenum-rated (FPLP). Support spacing, color coding, and derating do not address the plenum requirement.

Question 38National Electrical Code (NFPA 70) requirements for fire alarm circuits

Which of the following is a requirement for identifying fire alarm circuit conductors at terminal points?

  1. They must be marked at least every 12 inches
  2. They must be color-coded red throughout
  3. They must be tagged with a durable marking Correct answer.
  4. They must be identified by a separate label

Explanation

NEC 760.45 requires that fire alarm circuit conductors be identified at terminal points by a durable marking, such as a tag, that indicates the circuit or system. Color coding alone or periodic marking along the run does not satisfy the terminal-point identification requirement.

Question 39National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm system is installed in a building where the ceiling is a suspended ceiling used as an environmental air plenum. Which cable type is permitted for the fire alarm circuit?

  1. Any of the above
  2. FPLP Correct answer.
  3. FPL
  4. FPLR

Explanation

NEC 760.179(D) requires that cables installed in environmental air spaces be plenum-rated, marked FPLP. FPLR and FPL are not suitable for plenum spaces, and not any cable type is permitted.

Question 40National Electrical Code (NFPA 70) requirements for fire alarm circuits

A fire alarm circuit is installed in a raceway that also contains conductors of a different fire alarm system supplied by a different control unit. What is the primary NEC requirement?

  1. The conductors must be derated for temperature
  2. The conductors must be supported every 18 inches
  3. The conductors must be color-coded to distinguish the systems
  4. The conductors must be separated by a barrier or installed in a separate raceway Correct answer.

Explanation

NEC 760.139 requires that fire alarm circuit conductors of different systems be separated by a barrier or installed in separate raceways to prevent interference and maintain integrity. Color coding, derating, and support spacing do not provide the required separation.

Question 41National Fire Alarm and Signaling Code (NFPA 72) fundamentals

Under NFPA 72, which condition defines a 'trouble signal' on a fire alarm control unit?

  1. An abnormal condition in a circuit, component, or power supply that compromises system integrity Correct answer.
  2. A signal generated only when a manual pull station is activated
  3. An indication that the system is in normal supervisory operation
  4. A signal indicating that a detector has sensed products of combustion

Explanation

NFPA 72 treats a trouble signal as an indication of an abnormal condition in a circuit, component, or power supply that could impair system performance. It is distinct from alarm and supervisory signals and must annunciate audibly and visibly at the control unit.

Question 42National Fire Alarm and Signaling Code (NFPA 72) fundamentals

In a protected premises system, which device is required to be installed to transmit an alarm automatically to an off-premises supervising station?

  1. A duct smoke detector
  2. A digital alarm communicator transmitter Correct answer.
  3. A manual fire alarm box
  4. An audible notification appliance

Explanation

A digital alarm communicator transmitter (DACT) is one of the listed means of transmitting alarm, supervisory, and trouble signals to a supervising station over the public switched telephone network or other permitted pathway. Manual boxes, notification appliances, and duct detectors do not perform off-premises transmission.

Question 43National Fire Alarm and Signaling Code (NFPA 72) fundamentals

According to NFPA 72, how often must the initiating devices of a fire alarm system be inspected and tested?

  1. Only when a fault is reported
  2. Monthly
  3. Every two years
  4. Annually Correct answer.

Explanation

NFPA 72's inspection, testing, and maintenance tables require most initiating devices to be tested at least annually. Monthly and two-year intervals apply to other specific components, and testing only on fault reports is not a compliant schedule.

Question 44National Fire Alarm and Signaling Code (NFPA 72) fundamentals

What is the maximum spacing permitted between spot-type smoke detectors on a smooth ceiling under NFPA 72?

  1. 50 ft
  2. 15 ft
  3. 30 ft Correct answer.
  4. 20 ft

Explanation

NFPA 72 permits a maximum spacing of 30 ft between spot-type smoke detectors on smooth ceilings, with the first detector located within half that distance of a wall. The spacing is reduced for ceiling heights above the listed limits.

Question 45National Fire Alarm and Signaling Code (NFPA 72) fundamentals

Which of the following best describes the purpose of a supervisory signal on a fire alarm system?

  1. To indicate that smoke has been detected in a protected area
  2. To indicate that the primary power supply has failed
  3. To indicate that a notification appliance circuit is open
  4. To indicate an off-normal condition of a system or process that is supervised, such as a closed sprinkler control valve Correct answer.

Explanation

Supervisory signals alert building personnel to off-normal conditions of supervised systems, such as sprinkler control valves, waterflow or tamper switches, and suppression systems. They are distinct from alarm and trouble signals.

Question 46National Fire Alarm and Signaling Code (NFPA 72) fundamentals

Which notification appliance characteristic is governed by the requirements for audible signal sound pressure levels in NFPA 72?

  1. The alarm must be transmitted to the fire department
  2. The alarm must be recorded in the system event log
  3. The alarm must be visible from every point in the building
  4. The alarm must be audible throughout the protected area at a level above ambient noise Correct answer.

Explanation

NFPA 72 requires audible notification to be heard throughout the protected area above ambient sound levels, with specific minimum sound pressure criteria. Visibility, transmission, and logging are separate requirements addressed elsewhere in the code.

Question 47National Fire Alarm and Signaling Code (NFPA 72) fundamentals

Under NFPA 72, which class of pathway is capable of transmitting signals during a single open or ground fault condition?

  1. Class D
  2. Class A Correct answer.
  3. Class C
  4. Class B

Explanation

Class A pathways provide a redundant path so that a single open or ground fault does not prevent signal transmission. Class B pathways do not survive a single open circuit and are therefore limited to less critical applications.

Question 48National Fire Alarm and Signaling Code (NFPA 72) fundamentals

Which document is the primary standard for the installation, performance, testing, and maintenance of fire alarm systems?

  1. NFPA 101
  2. NFPA 70
  3. NFPA 72 Correct answer.
  4. NFPA 13

Explanation

NFPA 72, the National Fire Alarm and Signaling Code, governs the design, installation, commissioning, testing, and maintenance of fire alarm and signaling systems. The other documents address sprinklers, electrical installations, and life safety respectively.

Question 49National Fire Alarm and Signaling Code (NFPA 72) fundamentals

A spot-type smoke detector is installed on a smooth ceiling. The nearest wall is 12 ft away. What is the maximum allowable distance from the detector to the wall?

  1. 15 ft Correct answer.
  2. 30 ft
  3. 12 ft
  4. 10 ft

Explanation

The first detector on a smooth ceiling must be located no more than half the maximum spacing from a wall, so the limit is 15 ft. A 12 ft distance is compliant but is not the maximum permitted.

Question 50National Fire Alarm and Signaling Code (NFPA 72) fundamentals

Which of the following conditions requires a trouble signal to be annunciated at the fire alarm control unit within a specified time?

  1. Actuation of a waterflow switch
  2. An open circuit in a supervised initiating device circuit Correct answer.
  3. Detection of smoke by a duct detector
  4. Activation of a manual pull station

Explanation

An open circuit in a supervised initiating circuit is a trouble condition and must be annunciated within the time limits established by NFPA 72. Waterflow switch actuation and manual station activation produce alarm signals, while duct detector activation is also an alarm.