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Question 1Fire Detection and Alarm System Fundamentals

In a conventional fire alarm system, what is the primary function of an initiating device circuit (IDC)?

  1. To provide the 24-hour standby battery charging current
  2. To connect detection devices to the control panel so alarm and trouble conditions can be detected Correct answer.
  3. To supply supervised operating power to notification appliances
  4. To isolate the panel from the public telephone network

Explanation

An initiating device circuit is the supervised wiring path that links automatic detectors and manual pull stations to the fire alarm control panel. The panel monitors the circuit to recognize alarm, trouble, and open-circuit conditions. Notification appliance circuits, not IDCs, serve audible and visual signaling.

Question 2Fire Detection and Alarm System Fundamentals

Which device is classified as a manual initiating device in a fire detection system?

  1. A photoelectric smoke detector
  2. A manual pull station Correct answer.
  3. An addressable relay module
  4. A wall-mounted horn strobe

Explanation

Manual initiating devices are operated by a person, and the manual pull station is the classic example. Smoke detectors are automatic initiating devices, while horns, strobes, and relay modules are notification or control devices rather than initiating devices.

Question 3Fire Detection and Alarm System Fundamentals

What is the purpose of a smoke detector's listed spacing and the 30-foot rule commonly applied to spot-type detectors on a smooth ceiling?

  1. To guarantee detection within a specific time after ignition
  2. To determine the maximum circuit length allowed on the loop
  3. To set the minimum sound pressure level at the pillow
  4. To limit the protected area assigned to each detector based on ceiling height and detector listing Correct answer.

Explanation

Listed spacing rules translate detector performance into a maximum protected area per device, adjusted for ceiling height and configuration. The 30-foot figure is a common reference spacing for spot-type smoke detectors on smooth ceilings, subject to the listing and code. Spacing rules do not promise a detection time.

Question 4Fire Detection and Alarm System Fundamentals

A heat detector rated for a fixed temperature of 135°F is installed in a space where normal ambient temperatures reach 110°F. What is the main concern with this selection?

  1. The detector will fail to operate because the set point is above ambient
  2. The detector may nuisance-alarm because the margin to its set point is too small Correct answer.
  3. The detector will produce a supervisory signal instead of an alarm
  4. The detector cannot be connected to a conventional panel

Explanation

A fixed-temperature heat detector should be selected so its set point is well above the highest expected ambient temperature. With only a 25°F margin, normal temperature swings or equipment heat could trip the device and cause an unwanted alarm. Proper selection generally requires a larger margin between ambient and set point.

Question 5Fire Detection and Alarm System Fundamentals

What distinguishes an addressable fire alarm system from a conventional system?

  1. Addressable systems use only two-wire detection circuits with no supervision
  2. Addressable systems identify each device individually so the panel can report its specific location Correct answer.
  3. Addressable systems cannot use manual pull stations
  4. Addressable systems eliminate the need for notification appliances

Explanation

In an addressable system, each initiating device or module has a unique address, allowing the panel to report the exact device in alarm or trouble. Conventional systems typically report by zone rather than by individual device. Addressable systems still require notification appliances and support manual stations.

Question 6Fire Detection and Alarm System Fundamentals

Which condition describes a supervisory signal on a fire alarm control panel?

  1. The primary power has failed and the panel is on battery
  2. A notification circuit is drawing too much current
  3. A sprinkler control valve has been closed Correct answer.
  4. A detector has detected smoke above its threshold

Explanation

Supervisory signals monitor the integrity of suppression system components, such as closed control valves or low water levels. They are distinct from alarm signals, which indicate fire, and from trouble signals, which indicate system faults. A closed sprinkler valve would impair suppression and therefore reports as supervisory.

Question 7Fire Detection and Alarm System Fundamentals

Why must fire alarm initiating device circuits be supervised?

  1. To reduce the number of devices permitted on a circuit
  2. To increase the voltage available to smoke detectors
  3. To allow the circuit to carry notification appliance power
  4. To ensure the circuit is monitored for opens, shorts, and ground faults so failures are annunciated Correct answer.

Explanation

Supervision means the panel continuously monitors the circuit so that a break, short, or ground fault produces a trouble indication rather than leaving the system silently inoperative. This integrity monitoring is a core requirement of fire alarm design. Supervision does not exist to boost voltage or to carry appliance power.

Question 8Fire Detection and Alarm System Fundamentals

A technician is installing a photoelectric smoke detector near a bathroom door. Which condition most likely explains a nuisance alarm?

  1. The detector is too far from the panel
  2. Moisture and steam from the bathroom are entering the detection chamber Correct answer.
  3. The circuit is wired with shielded cable
  4. The detector's LED is illuminated during normal operation

Explanation

Photoelectric detectors respond to light scattered by particles, and steam or moisture can mimic smoke and cause false alarms. Detectors should be located away from bathrooms, showers, and other sources of steam or vapor. Cable shielding and LED status do not cause nuisance alarms.

Question 9Fire Detection and Alarm System Fundamentals

What is the role of an end-of-line resistor in a conventional initiating device circuit?

  1. It provides the current that operates the alarm relay
  2. It allows the panel to monitor the circuit for opens and shorts Correct answer.
  3. It limits the sound output of notification appliances
  4. It stores standby power for the panel

Explanation

The end-of-line resistor completes the supervised circuit and establishes a reference current that the panel monitors. A break in the wiring changes the current and produces a trouble, while a short also alters the monitored value. The resistor does not operate relays or store energy.

Question 10Fire Detection and Alarm System Fundamentals

Which of the following best describes the function of a duct smoke detector?

  1. It provides area smoke detection for the occupied space below the ceiling
  2. It serves as the primary notification appliance for the building
  3. It detects smoke within an HVAC duct and typically initiates a supervisory or equipment shutdown response Correct answer.
  4. It replaces the need for manual pull stations at exits

Explanation

Duct smoke detectors sample air moving through HVAC ducts and are used to control smoke spread, often by shutting down fans or dampers. Their response is commonly supervisory or equipment-control rather than a general evacuation alarm. They do not replace area detection or manual stations.

Question 11Fire Detection and Alarm System Fundamentals

A spot-type heat detector is being selected for a room with a high ceiling. Which factor most directly affects the number of detectors required?

  1. The color of the ceiling finish
  2. The brand of the control panel
  3. The listed coverage area adjusted for ceiling height Correct answer.
  4. The size of the standby battery

Explanation

Detector quantity is determined by dividing the protected area by the listed coverage per detector, with adjustments for ceiling height and configuration. Higher ceilings generally reduce the coverage area per detector because smoke must travel farther before reaching the device. Panel brand and battery size do not determine detector count.

Question 12Fire Detection and Alarm System Fundamentals

What is the purpose of a notification appliance circuit (NAC)?

  1. To supply supervised power to horns, strobes, and speakers so they operate during an alarm Correct answer.
  2. To connect smoke detectors to the panel for alarm reporting
  3. To monitor sprinkler valve position
  4. To provide the telephone line for central station communication

Explanation

NACs are the supervised output circuits that power and control audible and visual notification appliances. They are separate from initiating circuits, which handle detection input. Sprinkler valve monitoring is supervisory, and communications use separate pathways.

Question 13Fire Detection and Alarm System Fundamentals

Which detector technology is generally most appropriate for detecting a slow, smoldering fire that produces visible smoke?

  1. Rate-of-rise heat detection
  2. Fixed-temperature heat detection
  3. Photoelectric smoke detection Correct answer.
  4. Ionization smoke detection

Explanation

Photoelectric detectors are especially responsive to larger smoke particles typical of smoldering fires. Ionization detectors tend to respond better to fast-flaming fires with smaller particles. Heat detectors require significant temperature change and respond more slowly to smoldering conditions.

Question 14Fire Detection and Alarm System Fundamentals

A manual pull station must be installed so that it is accessible and conspicuous. Which installation practice best supports this requirement?

  1. Installing it inside a locked electrical closet
  2. Placing it above a suspended ceiling tile
  3. Locating it along the normal path of egress at a consistent height Correct answer.
  4. Mounting it near the floor behind a storage rack

Explanation

Manual stations should be located along the path of egress, unobstructed, and at a consistent, accessible mounting height so occupants can find and operate them quickly. Concealment behind racks or in locked closets defeats the purpose. Above-ceiling locations are not accessible to occupants.

Question 15Fire Detection and Alarm System Fundamentals

What does a trouble signal on a fire alarm control panel typically indicate?

  1. A sprinkler valve has been closed
  2. A fault exists in the system, such as a wiring break or power problem Correct answer.
  3. A notification appliance is sounding at the correct level
  4. A fire has been confirmed in a protected space

Explanation

Trouble signals alert building personnel to conditions that impair system operation, such as open circuits, ground faults, or loss of primary power. They are distinct from alarm signals and from supervisory signals. A closed sprinkler valve is supervisory, not a general trouble.

Question 16Fire Detection and Alarm System Fundamentals

An installer must verify that a smoke detector's listed spacing is appropriate for a ceiling with beams that project significantly below the ceiling surface. What is the correct approach?

  1. Remove the beams before installing detectors
  2. Ignore the beams and use smooth-ceiling spacing throughout
  3. Double the spacing because beams channel smoke
  4. Apply the code and listing rules for beamed ceilings, which may require reduced spacing or additional detectors Correct answer.

Explanation

Beams and joists can trap smoke in pockets and alter detector response, so codes and listings provide specific rules for beamed ceilings. These rules often require reduced spacing or detectors in each bay. Simply applying smooth-ceiling spacing can leave smoke pockets undetected.

Question 17Fire Detection and Alarm System Fundamentals

A conventional zone circuit shows a trouble condition immediately after installation, but no devices are in alarm. Which cause is most consistent with an open-circuit trouble?

  1. A detector that has sensed smoke
  2. A closed sprinkler control valve
  3. A missing end-of-line resistor at the last device Correct answer.
  4. A notification appliance drawing excessive current

Explanation

An open supervised circuit often results from a missing or improperly connected end-of-line resistor, which prevents the panel from seeing the expected reference current. Smoke detection would produce an alarm, not an open-circuit trouble. Appliance overcurrent and closed valves produce different signals.

Question 18Fire Detection and Alarm System Fundamentals

Which statement correctly describes the relationship between alarm signals and notification appliance operation?

  1. Notification appliances operate only after a trouble signal is acknowledged
  2. An alarm signal from an initiating device causes the panel to activate notification appliances according to its programmed sequence Correct answer.
  3. Notification appliances operate continuously regardless of panel status
  4. Alarm signals are sent only to the central station and never activate local appliances

Explanation

When an initiating device reports an alarm, the panel executes its programmed output logic to energize notification appliance circuits, alerting occupants. Local signaling is a core function and is not dependent on central station transmission. Appliances do not run continuously under normal conditions.

Question 19Fire Detection and Alarm System Fundamentals

Why are smoke detectors generally not recommended for installation directly above cooking equipment in a commercial kitchen?

  1. Smoke detectors cannot operate at kitchen temperatures
  2. Kitchen ceilings are always too high for detector spacing
  3. Cooking vapors and particles can cause nuisance alarms and contamination Correct answer.
  4. The detector's listing prohibits use in commercial buildings

Explanation

Cooking produces aerosols and particles that photoelectric and ionization detectors can interpret as smoke, leading to false alarms and chamber contamination. Detectors are therefore located away from cooking appliances or appropriate detection types are selected. Commercial buildings certainly use smoke detection elsewhere.

Question 20Fire Detection and Alarm System Fundamentals

An addressable system reports a device as missing from the loop even though the device appears physically connected. Which explanation is most plausible?

  1. The notification appliance circuit is overloaded
  2. The sprinkler valve is open
  3. The standby battery is fully charged
  4. The device address is duplicated or incorrectly set, so the panel cannot identify it uniquely Correct answer.

Explanation

Addressable panels identify devices by their programmed address, so a duplicate or misconfigured address can cause a device to be unrecognized or reported as missing. Notification circuit loading, battery charge, and valve position do not affect device addressing. Correct addressing is essential for reliable reporting.

Question 21Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

Under NFPA 72, which document type is the formal record that documents the design and installation details of a fire alarm system and must be kept available for the authority having jurisdiction?

  1. Fire safety plan
  2. As-built drawing set
  3. Record of completion Correct answer.
  4. Inspection report

Explanation

NFPA 72 requires the contractor to provide a Record of Completion at the time of system acceptance, documenting that the system was installed per the design and applicable standards. It is the primary compliance document the AHJ reviews. Drawings and inspection reports support it but do not replace it.

Question 22Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

Per NEC Article 760, fire alarm power-limited circuit conductors are classified as which of the following?

  1. Class 5 circuits
  2. Class 2 or Class 3 circuits Correct answer.
  3. Class 4 circuits
  4. Class 1 circuits

Explanation

NEC Article 760 covers fire alarm systems and treats power-limited fire alarm circuits as Class 2 or Class 3 circuits, which allows reduced wiring methods compared with Class 1. Non-power-limited fire alarm circuits are treated as Class 1. The distinction governs conductor and raceway requirements.

Question 23Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

According to NFPA 72, initiating device circuits and notification appliance circuits that are monitored for integrity are designated by which class?

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

Explanation

NFPA 72 Style/Class designations describe circuit performance. Class B circuits are monitored for integrity and provide a single path; an open fault is annunciated but disables devices beyond the break. Class A provides a redundant return path so the circuit continues to function after a single open.

Question 24Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

A contractor is installing a fire alarm system in a new commercial building in Oregon. Which edition of the Oregon Fire Code governs the fire alarm provisions unless the local jurisdiction has adopted a different edition?

  1. The most recent edition of NFPA 1 regardless of state adoption
  2. The edition in effect when the building permit was first applied for anywhere in the state
  3. The edition referenced in the building owner's insurance policy
  4. The edition adopted by the Oregon State Fire Marshal through the state adoption process Correct answer.

Explanation

Oregon adopts the Oregon Fire Code through the state rulemaking process administered by the Oregon State Fire Marshal, and the adopted edition is what applies. Local jurisdictions enforce that adopted edition. The code edition is not chosen by the owner or insurer.

Question 25Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

NFPA 72 requires that the spacing of spot-type smoke detectors on a smooth ceiling be based on which principle?

  1. A spacing determined solely by the room's square footage
  2. A spacing equal to twice the ceiling height
  3. The listed spacing for the detector adjusted for ceiling height and configuration Correct answer.
  4. A fixed 30 ft spacing for all ceiling heights

Explanation

NFPA 72 uses the listed spacing of the detector and applies adjustment factors for ceiling height and configuration, such as smooth versus beam ceilings. Detectors must be placed so that all points on the ceiling are within the spacing limits. A blanket fixed dimension does not apply to all conditions.

Question 26Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

In a protected premises fire alarm system, which component is required to receive signals and, when actuated, cause the appropriate alarm and notification functions?

  1. The waterflow switch
  2. The fire alarm control unit Correct answer.
  3. The remote annunciator
  4. The duct smoke detector

Explanation

The fire alarm control unit is the central processing component that receives initiating device signals and activates notification appliances and other outputs. Annunciators display status but do not perform the control function. Detectors and switches are initiating devices.

Question 27Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

According to NFPA 72, how often must a waterflow switch be tested to verify that it actuates and transmits an alarm signal within the required time?

  1. Monthly
  2. Quarterly
  3. Semiannually Correct answer.
  4. Annually

Explanation

NFPA 72 Table 14.4.3.2 requires waterflow switches to be tested semiannually. The test verifies that the device actuates and that the alarm signal is transmitted within the time allowed by the standard. Monthly testing applies to other devices such as manual pull stations in some cases.

Question 28Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

A manual fire alarm box installed in a corridor must be located so that it is accessible and within what maximum travel distance along the path of egress under NFPA 72?

  1. 200 ft Correct answer.
  2. 150 ft
  3. 50 ft
  4. 100 ft

Explanation

NFPA 72 requires manual fire alarm boxes to be located so that no point in the protected area is more than 200 ft from a box along the path of egress travel. This ensures occupants can reach a box promptly. The distance is measured along the walking route, not straight-line.

Question 29Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

Which NFPA 72 requirement applies to the audible notification appliances in a sleeping area of a residential occupancy?

  1. They must produce a sound level at least 15 dBA above ambient or 75 dBA, whichever is greater, at the pillow Correct answer.
  2. They must produce a sound level of at least 45 dBA at the pillow
  3. They must be connected only to the building's general alarm system
  4. They must be located only in the hallway outside the sleeping room

Explanation

NFPA 72 requires that audible notification in sleeping areas achieve at least 15 dBA above the ambient sound level or 75 dBA, whichever is greater, measured at the pillow level. This ensures the alarm will awaken occupants. Lower levels may not reliably arouse sleeping persons.

Question 30Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

Under NEC Article 760, which wiring method is permitted for non-power-limited fire alarm circuit conductors in a commercial building?

  1. Type NM cable without additional protection
  2. Type FPLP cable in a raceway Correct answer.
  3. Type CL3P cable without conduit
  4. Open conductors supported on insulators

Explanation

Non-power-limited fire alarm circuits require wiring methods suitable for Class 1 circuits, such as conductors in raceway or approved fire alarm cable. Type FPLP is a listed fire alarm cable suitable for this use. Open conductors and general-purpose cables not listed for fire alarm use are not permitted.

Question 31Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

NFPA 72 requires that a fire alarm system's primary power supply be provided by which source?

  1. A generator only
  2. A dedicated branch circuit from the commercial light and power source Correct answer.
  3. A battery bank only
  4. A photovoltaic array only

Explanation

NFPA 72 requires a primary power supply from a dedicated branch circuit connected to the commercial light and power source, with overcurrent protection and a means of disconnect. Batteries or generators serve as secondary power. Using only an alternate source does not satisfy the primary supply requirement.

Question 32Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

When a fire alarm system uses a secondary power supply consisting of batteries, NFPA 72 requires that the batteries be capable of operating the system under normal load for how long, followed by alarm load for how long?

  1. 24 hours normal, 15 minutes alarm
  2. 24 hours normal, 5 minutes alarm Correct answer.
  3. 48 hours normal, 5 minutes alarm
  4. 12 hours normal, 30 minutes alarm

Explanation

NFPA 72 requires secondary battery capacity for 24 hours of normal (quiescent) operation followed by 5 minutes of alarm operation, unless a longer duration is required by the authority having jurisdiction. This ensures the system remains functional during a power outage. Larger systems or specific occupancies may require more.

Question 33Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

An installer is routing fire alarm cable through a plenum space. Which cable type is required by the NEC for this location?

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

Explanation

NEC Article 760 requires plenum-rated fire alarm cable, designated FPLP, when installed in a plenum space because of its low smoke and flame-spread characteristics. FPLR is riser-rated and FPL is general-purpose, neither of which is acceptable in a plenum. Using conduit does not convert a non-plenum cable into a plenum-rated one.

Question 34Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

Under NFPA 72, which of the following is the correct action when a supervisory signal is received at the fire alarm control unit?

  1. Transmit the signal only to the fire department
  2. Ignore the signal until an alarm condition occurs
  3. Immediately sound the general alarm throughout the building
  4. Annunciate the supervisory condition distinctly from alarm and trouble signals Correct answer.

Explanation

NFPA 72 requires supervisory signals to be annunciated in a manner distinct from alarm and trouble signals so that building staff can respond appropriately. Supervisory conditions indicate an off-normal state of a system component, such as a closed valve. They do not automatically trigger general evacuation.

Question 35Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

A contractor is installing a fire alarm system in a building with a required fire alarm system under the Oregon Fire Code. Which document must be submitted to the authority having jurisdiction before the system is placed in service?

  1. A copy of the manufacturer's warranty
  2. The Record of Completion and associated test results Correct answer.
  3. The electrical contractor's license only
  4. The building owner's insurance certificate

Explanation

NFPA 72 and the Oregon Fire Code require that the Record of Completion and documentation of acceptance testing be provided to the AHJ before the system is placed in service. This verifies the system was installed and tested per the approved design. A warranty or insurance certificate does not fulfill this requirement.

Question 36Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

NFPA 72 requires that a duct smoke detector installed in an air-handling system of a commercial building be tested at what interval?

  1. Monthly
  2. Every two years
  3. Annually Correct answer.
  4. Quarterly

Explanation

NFPA 72 requires duct smoke detectors to be tested annually as part of the inspection, testing, and maintenance schedule. The test verifies detector response and proper signal transmission. More frequent testing may be required by the manufacturer or AHJ.

Question 37Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

Which of the following best describes the purpose of a fire alarm system's trouble signal under NFPA 72?

  1. To indicate an off-normal condition in the system that could impair its operation Correct answer.
  2. To indicate that a fire has been detected
  3. To indicate that the system is operating normally
  4. To indicate that a sprinkler valve has been closed

Explanation

A trouble signal indicates an off-normal condition in the system, such as an open circuit, ground fault, or loss of primary power, that could impair operation. It is distinct from alarm and supervisory signals. Prompt attention to trouble signals maintains system reliability.

Question 38Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

Under NFPA 72, what is the maximum allowable response time for a fire alarm system to activate notification appliances after an initiating device operates, where the system is not a delayed-response type?

  1. 60 seconds
  2. 90 seconds
  3. 30 seconds Correct answer.
  4. 10 seconds

Explanation

NFPA 72 requires that notification appliances be activated within 30 seconds of an initiating device signal unless a longer delay is permitted for specific arrangements such as voice systems with an approved prerecorded message. This ensures timely occupant notification. Delays beyond this require specific approval.

Question 39Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

A technician is installing a fire alarm system in a building with a sprinkler system. Under NFPA 72, where must a waterflow switch be installed relative to the sprinkler control valve?

  1. At the main drain only
  2. On the system side of the control valve so it detects flow when the valve is open Correct answer.
  3. On the supply side of the control valve upstream of the valve
  4. At the fire department connection

Explanation

A waterflow switch must be installed on the system side of the sprinkler control valve so that it detects waterflow into the sprinkler piping when the valve is open. Installing it on the supply side would not sense flow into the system. Proper location ensures prompt alarm on sprinkler activation.

Question 40Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

NFPA 72 requires that visible notification appliances in a public mode area be placed so that the entire area is covered. Which factor primarily determines the spacing and intensity of visible appliances?

  1. The ceiling height only
  2. The candela rating of the appliance and the room dimensions Correct answer.
  3. The building's construction type only
  4. The number of occupants only

Explanation

Visible notification appliance spacing depends on the appliance's candela rating and the dimensions of the space, as specified in NFPA 72's coverage tables. Higher candela ratings cover larger areas. Ceiling height and construction type may influence design but do not alone determine spacing.

Question 41Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

Under the NEC, which of the following is a requirement for the disconnecting means for a fire alarm control unit?

  1. It must be lockable only by the fire department
  2. It must be located in a locked electrical room only
  3. It must be accessible only to the building owner
  4. It must be clearly marked and accessible to authorized personnel Correct answer.

Explanation

NEC Article 760 requires a means of disconnect for the fire alarm system that is clearly marked and accessible to authorized personnel. This allows servicing while maintaining control over unauthorized disconnection. Locking arrangements may be used but must not prevent authorized access.

Question 42Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

NFPA 72 requires that a fire alarm system's initiating devices be tested at initial acceptance and then periodically. Which of the following is the required testing interval for manual fire alarm boxes after acceptance?

  1. Monthly
  2. Quarterly
  3. Annually Correct answer.
  4. Semiannually

Explanation

NFPA 72 Table 14.4.3.2 requires manual fire alarm boxes to be tested annually after initial acceptance. The test verifies proper operation and signal transmission. More frequent testing may be required by the AHJ or specific occupancy requirements.

Question 43Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

A fire alarm system is being designed for a building with an atrium. Under NFPA 72, which of the following is true regarding smoke detector placement in the atrium?

  1. Detectors must be placed only at the floor level
  2. Detectors must be placed in accordance with the approved design and the ceiling configuration, considering the atrium's height and air movement Correct answer.
  3. Detectors are never required in atria
  4. Detectors must be placed only at the roof

Explanation

NFPA 72 requires that smoke detectors in atria be placed according to the approved design, taking into account ceiling configuration, height, and air movement. Atria present unique challenges because of stratification and large volume. A blanket rule to omit or place detectors only at one level is incorrect.

Question 44Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

Which NFPA 72 requirement applies to the marking of fire alarm control unit and remote annunciator locations?

  1. They must be marked with the installer's license number only
  2. They must be marked with the manufacturer's name only
  3. They must be marked with the name and location of the protected premises and the function of the unit Correct answer.
  4. They must be marked with the building's occupancy classification only

Explanation

NFPA 72 requires that fire alarm control units and remote annunciators be marked with the name of the protected premises, its location, and the function of the unit. This helps responding personnel identify the system they are dealing with. Manufacturer or license markings alone do not fulfill this requirement.

Question 45Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

Under the Oregon Fire Code, when a fire alarm system is required in an existing building undergoing a change of occupancy, which of the following generally applies?

  1. No fire alarm system is ever required in existing buildings
  2. The system may be required to be installed or upgraded as determined by the authority having jurisdiction based on the hazard Correct answer.
  3. Only a manual alarm system is required regardless of occupancy
  4. The system must always meet the current code for new construction

Explanation

The Oregon Fire Code addresses existing buildings and changes of occupancy, and the AHJ determines what fire protection features, including fire alarm systems, are required based on the new occupancy's hazard. Requirements are not automatically the same as new construction. The AHJ's determination governs the upgrade scope.

Question 46Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

A contractor is installing a fire alarm system in a new commercial building in Oregon. Which document is the legally adopted fire code that governs the installation, and which model code is it based on?

  1. The Oregon Structural Specialty Code, which is based on NFPA 5000
  2. The Oregon Electrical Specialty Code, which is based on NFPA 72
  3. The Oregon Fire Code, which is based on NFPA 1 Fire Code
  4. The Oregon Fire Code, which is based on the International Fire Code Correct answer.

Explanation

Oregon adopts the Oregon Fire Code as its enforceable fire regulation, and that document is derived from the International Fire Code published by the International Code Council. The Oregon Fire Code then adopts NFPA 72 by reference for fire alarm system design, installation, and maintenance. The structural and electrical specialty codes govern other disciplines and do not replace the fire code's alarm provisions.

Question 47Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

Under NEC Article 760, fire alarm circuit conductors are classified into which two categories that determine permitted wiring methods and cable markings?

  1. Indoor and outdoor
  2. General purpose and special purpose
  3. Class 1 and Class 2
  4. Power-limited and non-power-limited Correct answer.

Explanation

Article 760 divides fire alarm circuits into power-limited fire alarm (PLFA) circuits and non-power-limited fire alarm (NPLFA) circuits, and each has its own permitted conductors, cables, and wiring methods. The distinction drives requirements such as circuit voltage and power limits, conductor sizing, and the cable listing markings permitted in a given space.

Question 48Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

A designer must size the secondary power supply for a new fire alarm system. Under NFPA 72, the secondary supply must be capable of operating the system under quiescent load for how long, and then in full alarm load for how long?

  1. 12 hours quiescent, then 15 minutes of alarm
  2. 48 hours quiescent, then 10 minutes of alarm
  3. 24 hours quiescent, then 5 minutes of alarm
  4. 24 hours quiescent, then 15 minutes of alarm Correct answer.

Explanation

NFPA 72 requires the secondary power supply to sustain the system in quiescent (trouble) condition for 24 hours and then be capable of operating the system under full alarm load for 15 minutes. The 24-hour figure allows for a prolonged utility outage with the system still monitoring, and the 15-minute alarm window ensures occupant notification is available at the end of that outage.

Question 49Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

An installer is mounting a manual fire alarm box on a corridor wall in an accessible commercial building. Which combination of mounting height and maximum travel distance satisfies NFPA 72?

  1. Mounting height not more than 42 in (1.07 m) to the operating handle, within 100 ft (30 m) of travel
  2. Mounting height not more than 48 in (1.22 m) to the operating handle, within 5 ft (1.5 m) of an exit door only
  3. Mounting height not more than 60 in (1.52 m) to the operating handle, within 200 ft (61 m) of travel
  4. Mounting height not more than 48 in (1.22 m) to the operating handle, within 200 ft (61 m) of travel Correct answer.

Explanation

NFPA 72 permits manual fire alarm boxes to be mounted so the operable portion is not more than 48 in (1.22 m) above the floor, and the boxes must be reachable within 200 ft (61 m) of travel along the path of egress. The 48 in height aligns with accessible reach ranges, and the 200 ft travel limit ensures occupants can reach a box without excessive travel in a corridor.

Question 50Codes and Standards (NFPA 72, NFPA 70/NEC, Oregon Fire Code)

A technician is installing a waterflow switch on a sprinkler system riser serving a fire alarm system. Under NFPA 72, the waterflow switch must be capable of transmitting an alarm signal when flow occurs at a rate consistent with which threshold, and within what maximum delay after flow begins?

  1. Flow equal to one sprinkler of the smallest orifice, with a maximum delay of 90 seconds
  2. Any detectable flow, with no delay permitted
  3. Flow of 10 gpm or greater, with a maximum delay of 90 seconds Correct answer.
  4. Flow of 30 gpm or greater, with a maximum delay of 30 seconds

Explanation

NFPA 72 requires waterflow switches to actuate at a flow rate of 10 gpm or greater and to transmit the alarm within 90 seconds after flow begins, so that small incidental surges do not cause nuisance alarms while genuine sprinkler flow is reported promptly. The 90-second window also accommodates the retarding mechanism used to prevent false alarms from pressure fluctuations.