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AK Fire Alarm practice questions

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Question 1Fire Alarm System Fundamentals and Terminology

In fire alarm terminology, what does the abbreviation FACP stand for?

  1. Field Alarm Control Point
  2. Fire Area Control Program
  3. Fire Alarm Circuit Protector
  4. Fire Alarm Control Panel Correct answer.

Explanation

FACP is the standard abbreviation for Fire Alarm Control Panel, the central unit that receives signals from initiating devices and controls notification appliances.

Question 2Fire Alarm System Fundamentals and Terminology

Which term describes a device that automatically detects a fire condition and sends a signal to the control panel, such as a smoke detector?

  1. Annunciator
  2. Initiating device Correct answer.
  3. Notification appliance
  4. Initiating circuit

Explanation

Initiating devices, such as smoke detectors and manual pull stations, detect or report a fire condition and send a signal to the control panel. Notification appliances, by contrast, alert occupants.

Question 3Fire Alarm System Fundamentals and Terminology

A horn or strobe that alerts building occupants to evacuate is best described as which of the following?

  1. Initiating circuit
  2. Initiating device
  3. Supervisory device
  4. Notification appliance Correct answer.

Explanation

Notification appliances produce audible and visible signals to warn occupants. Horns and strobes are the classic examples of notification appliances.

Question 4Fire Alarm System Fundamentals and Terminology

What is the primary purpose of a manual pull station in a fire alarm system?

  1. To detect smoke particles in the air
  2. To provide backup power to the control panel
  3. To allow a person to manually initiate an alarm signal Correct answer.
  4. To monitor the water pressure in a sprinkler system

Explanation

A manual pull station is a manually operated initiating device that lets a person trigger the alarm when a fire is observed. It does not detect fire automatically.

Question 5Fire Alarm System Fundamentals and Terminology

A signal indicating a fault or off-normal condition in a system component, such as a broken sprinkler valve, is called a:

  1. Supervisory signal Correct answer.
  2. Notification signal
  3. Alarm signal
  4. Trouble signal

Explanation

Supervisory signals indicate an off-normal condition in a system or component that could impair fire protection, such as a closed sprinkler control valve. Trouble signals indicate a fault in the fire alarm system itself.

Question 6Fire Alarm System Fundamentals and Terminology

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

  1. A sprinkler valve has been closed
  2. A fire has been detected in a protected area
  3. The system is in normal standby
  4. An abnormal condition in the system itself, such as a wiring fault Correct answer.

Explanation

Trouble signals report faults within the fire alarm system, such as open circuits, ground faults, or power failures. They indicate the system may not function properly, not that a fire exists.

Question 7Fire Alarm System Fundamentals and Terminology

Which of the following best describes a zone in a conventional fire alarm system?

  1. A physical grouping of devices on a circuit that reports as a single location Correct answer.
  2. A single smoke detector wired directly to the panel
  3. A software login level for the system operator
  4. The total number of notification appliances on a system

Explanation

In conventional systems, devices are grouped into zones, and the panel reports an alarm by zone rather than by individual device. This grouping identifies a general area of the building.

Question 8Fire Alarm System Fundamentals and Terminology

In an addressable fire alarm system, what distinguishes an addressable device from a conventional device?

  1. It requires no wiring to the control panel
  2. It cannot be supervised by the panel
  3. It reports a unique identifier so the panel can identify the specific device Correct answer.
  4. It only works with notification appliances

Explanation

Each addressable device has a unique address, allowing the panel to identify the exact device that initiated an alarm or trouble. Conventional devices only identify the zone.

Question 9Fire Alarm System Fundamentals and Terminology

What is the function of a signaling line circuit (SLC) in an addressable system?

  1. To monitor sprinkler water flow only
  2. To provide audible notification to occupants
  3. To supply AC power to the building
  4. To carry data between addressable devices and the control panel Correct answer.

Explanation

The signaling line circuit carries digital data between the control panel and addressable devices, allowing individual device communication. It is distinct from notification appliance circuits.

Question 10Fire Alarm System Fundamentals and Terminology

A notification appliance circuit (NAC) is primarily intended to:

  1. Monitor supervisory switch contacts
  2. Provide battery backup to the panel
  3. Connect addressable detectors to the panel
  4. Power and control notification appliances such as horns and strobes Correct answer.

Explanation

A NAC supplies power and control signals to notification appliances so they can sound and flash during an alarm. It is dedicated to occupant warning devices.

Question 11Fire Alarm System Fundamentals and Terminology

Which term refers to the condition in which a fire alarm system is powered and monitoring for signals but no alarm is active?

  1. Normal standby condition Correct answer.
  2. Trouble state
  3. Alarm state
  4. Supervisory state

Explanation

Normal standby is the quiescent condition in which the system is powered and monitoring but has no alarm, trouble, or supervisory condition. It is the system's normal resting state.

Question 12Fire Alarm System Fundamentals and Terminology

What is the purpose of a waterflow switch in a fire alarm system?

  1. To detect smoke in the sprinkler riser room
  2. To regulate the water pressure in the system
  3. To detect the flow of water in a sprinkler system and initiate an alarm Correct answer.
  4. To manually activate the alarm

Explanation

A waterflow switch senses water movement in the sprinkler piping and sends an alarm signal, indicating that a sprinkler head has operated. It is an initiating device.

Question 13Fire Alarm System Fundamentals and Terminology

A valve tamper switch on a sprinkler control valve typically produces which type of signal when the valve is closed?

  1. Notification signal
  2. Trouble signal
  3. Alarm signal
  4. Supervisory signal Correct answer.

Explanation

A valve tamper switch monitors the position of a sprinkler control valve. When the valve is off-normal, such as closed, it produces a supervisory signal because fire protection could be impaired.

Question 14Fire Alarm System Fundamentals and Terminology

Which of the following is an example of an automatic initiating device?

  1. Remote annunciator
  2. Manual pull station
  3. Duct smoke detector Correct answer.
  4. Horn strobe

Explanation

A duct smoke detector automatically senses smoke and initiates a signal without human action. Manual pull stations require a person to operate them.

Question 15Fire Alarm System Fundamentals and Terminology

What does the term 'supervision' mean when applied to fire alarm circuits?

  1. A human operator watches the panel at all times
  2. The panel monitors the circuit for integrity faults such as opens or grounds Correct answer.
  3. The system supervises building occupants during evacuation
  4. The circuit is protected by a fuse

Explanation

Circuit supervision means the panel continuously monitors the wiring for conditions such as opens, shorts, or grounds that would prevent reliable operation. This is distinct from human observation.

Question 16Fire Alarm System Fundamentals and Terminology

Which device is used to remotely display system status and signals away from the main control panel?

  1. Notification appliance
  2. Remote annunciator Correct answer.
  3. Initiating device
  4. Waterflow switch

Explanation

A remote annunciator provides a display of system status and signals at a location remote from the main panel, often near an entrance for responding personnel.

Question 17Fire Alarm System Fundamentals and Terminology

In fire alarm terminology, what is an 'alarm' signal defined as?

  1. A routine test of the system
  2. A fault in the system wiring
  3. An off-normal condition of a protected component
  4. A warning of a fire condition requiring response Correct answer.

Explanation

An alarm signal warns of a fire condition and calls for appropriate response. It is distinct from trouble and supervisory signals, which indicate faults or off-normal component conditions.

Question 18Fire Alarm System Fundamentals and Terminology

A building has a conventional panel with four zones. A detector in zone 3 activates. What information does the panel typically provide?

  1. The battery voltage of the panel
  2. The general location corresponding to zone 3 Correct answer.
  3. The exact address of the activated detector
  4. The time until the next automatic test

Explanation

Conventional panels report alarms by zone, so the response identifies the general area associated with zone 3 rather than the individual device. Addressable systems would identify the specific device.

Question 19Fire Alarm System Fundamentals and Terminology

Which of the following correctly pairs a device with its signal category?

  1. Pull station - trouble signal
  2. Valve tamper switch - supervisory device Correct answer.
  3. Smoke detector - notification appliance
  4. Horn strobe - initiating device

Explanation

A valve tamper switch monitors valve position and produces a supervisory signal when the valve is off-normal. Each other pairing mixes device types with the wrong signal category.

Question 20Fire Alarm System Fundamentals and Terminology

What is the key difference between a trouble signal and a supervisory signal?

  1. Trouble signals are audible only; supervisory signals are visual only
  2. Trouble signals are optional; supervisory signals are required by all codes
  3. Trouble signals indicate a fault in the fire alarm system; supervisory signals indicate an off-normal condition of a protected component Correct answer.
  4. Trouble signals indicate a fire; supervisory signals indicate smoke

Explanation

Trouble signals report faults within the fire alarm system itself, while supervisory signals report off-normal conditions of protected components such as sprinkler valves or tanks. The distinction lies in what is being monitored.

Question 21Fire Alarm System Fundamentals and Terminology

An addressable system reports an alarm from device address 47 on SLC loop 2. Why is this more useful than a conventional zone report?

  1. It allows the system to operate without power
  2. It identifies the specific device, enabling faster location of the fire Correct answer.
  3. It eliminates the need for notification appliances
  4. It removes the need for circuit supervision

Explanation

Addressable reporting pinpoints the individual device, which helps responders locate the fire more quickly than a general zone indication. Notification, supervision, and power requirements still apply.

Question 22Fire Alarm System Fundamentals and Terminology

A technician observes that the panel shows a supervisory signal for a closed sprinkler control valve. What is the most appropriate interpretation?

  1. The notification appliances have failed
  2. Fire protection may be impaired because a control valve is not in its normal open position Correct answer.
  3. A fire has been detected in the sprinkler riser
  4. The fire alarm system has a wiring fault

Explanation

A closed sprinkler control valve is an off-normal condition that can impair fire protection, which is exactly what a supervisory signal reports. It is neither a fire alarm nor a fault in the alarm system wiring.

Question 23Fire Alarm System Fundamentals and Terminology

Why must notification appliance circuits be electrically supervised in many installations?

  1. To confirm that the appliances will receive power and signals when needed Correct answer.
  2. To allow the panel to detect smoke directly
  3. To eliminate the need for a control panel
  4. To reduce the number of appliances required

Explanation

Supervision of notification circuits verifies circuit integrity so the appliances can operate during an alarm. A fault would otherwise go unnoticed until the devices were needed.

Question 24Fire Alarm System Fundamentals and Terminology

Which statement best describes the relationship between initiating devices and the fire alarm control panel?

  1. Initiating devices receive commands from the panel and activate accordingly
  2. Initiating devices and notification appliances are the same category of device
  3. Initiating devices send signals to the panel, which processes them and controls outputs Correct answer.
  4. Initiating devices operate independently and never communicate with the panel

Explanation

Initiating devices report conditions to the control panel, which processes the signals and controls outputs such as notification appliances. The panel is the central decision point of the system.

Question 25Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Under NFPA 72, which document type is used to describe the installation, testing, and maintenance requirements for a newly installed fire alarm system at a specific site?

  1. An as-built riser diagram
  2. A record of completion Correct answer.
  3. A shop drawing
  4. A contract specification

Explanation

NFPA 72 requires a Record of Completion to document that the installed system complies with the design and applicable standards. It captures system details, device counts, and certification signatures at project closeout.

Question 26Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

According to NFPA 72, how often must a waterflow switch on a wet-pipe sprinkler system be tested?

  1. Monthly
  2. Quarterly
  3. Annually
  4. Semi-annually Correct answer.

Explanation

NFPA 72 Table 14.4.3.2 requires mechanical waterflow devices to be tested semi-annually using the inspector's test valve. This confirms the device activates within the required time.

Question 27Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

In NFPA 70 (NEC), fire alarm control panel circuits that must remain operational during a fire are classified as which of the following?

  1. Class 1 power-limited circuits
  2. Non-power-limited fire alarm circuits Correct answer.
  3. Legacy control circuits
  4. Class 2 or Class 3 circuits

Explanation

Article 760 distinguishes non-power-limited fire alarm circuits, which supply fire alarm equipment that must operate during a fire, from power-limited circuits. Non-power-limited circuits are not subject to the same power limitations and are governed by Part II of Article 760.

Question 28Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

NFPA 101 requires that a fire alarm system in a new high-rise building be capable of notifying occupants by which method?

  1. Voice communication only
  2. Visible signal only
  3. Both audible and visible signals Correct answer.
  4. Audible alarm only

Explanation

NFPA 101 requires high-rise buildings to have an approved fire alarm system with both audible and visible notification so occupants, including those with hearing impairments, are alerted. Visible notification is required in occupiable areas.

Question 29Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

A technician is installing smoke detectors in a corridor with a ceiling height of 12 feet. Under NFPA 72 spacing rules for smooth ceilings, what is the maximum spacing between detectors?

  1. 40 feet
  2. 30 feet Correct answer.
  3. 50 feet
  4. 20 feet

Explanation

NFPA 72 permits a maximum spacing of 30 feet between smoke detectors on smooth ceilings, with the first detector located within 15 feet of any wall or end of the corridor. The listed spacing is a guide and must be adjusted for ceiling height and configuration.

Question 30Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Under the Alaska Fire Code, who is authorized to approve modifications to a required fire alarm system in an existing building?

  1. The building owner
  2. The fire code official Correct answer.
  3. The insurance carrier
  4. The installing contractor

Explanation

The Alaska Fire Code assigns enforcement and approval authority to the fire code official, who reviews and approves plans and modifications. Owner and contractor actions must be accepted by the authority having jurisdiction.

Question 31Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Which NFPA 72 requirement applies to the primary power supply for a fire alarm control unit?

  1. It must be a dedicated branch circuit with a lockable disconnect Correct answer.
  2. It may share a circuit with lighting if labeled
  3. It must be battery powered only
  4. It may be supplied from any convenience receptacle

Explanation

NFPA 72 requires the control unit to be connected to a dedicated branch circuit that is mechanically protected and has a means to disconnect that is accessible only to authorized personnel. This prevents accidental power loss.

Question 32Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

A spot-type heat detector is being installed in a room with a ceiling height of 10 feet. Under NFPA 72, what is the maximum listed spacing for a heat detector on a smooth ceiling?

  1. 50 feet Correct answer.
  2. 30 feet
  3. 40 feet
  4. 60 feet

Explanation

NFPA 72 allows a maximum spacing of 50 feet between heat detectors on smooth ceilings, with the first detector within 25 feet of a wall. Spacing must be reduced for higher ceilings and other conditions.

Question 33Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

In NFPA 72, the term 'initiating device' refers to which of the following?

  1. A device that isolates a circuit fault
  2. A device that transmits a signal to the control unit when a condition changes Correct answer.
  3. A device that provides standby battery power
  4. A device that produces audible or visible output

Explanation

Initiating devices, such as smoke detectors, heat detectors, and manual pull stations, send a signal to the fire alarm control unit when they detect a change in condition. Notification appliances produce output, and other devices serve separate functions.

Question 34Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Under NFPA 72, what is the minimum required sound pressure level for fire alarm notification in an occupiable space?

  1. 15 dB above ambient Correct answer.
  2. 20 dB above ambient
  3. 10 dB above ambient
  4. 5 dB above ambient

Explanation

NFPA 72 requires the alarm signal to be at least 15 dBA above the normal ambient sound level or 5 dBA above the maximum anticipated sound level, whichever is greater, in occupiable areas. This ensures audibility under expected conditions.

Question 35Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

A contractor installs a new fire alarm system in a business occupancy in Alaska. Which document must be submitted to the authority having jurisdiction before installation begins?

  1. A record of completion
  2. A warranty certificate
  3. A maintenance agreement
  4. Plans and specifications Correct answer.

Explanation

The Alaska Fire Code requires plans and specifications to be submitted to and approved by the fire code official before installation. The record of completion is submitted after installation.

Question 36Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Under NFPA 72, how often must a smoke detector be functionally tested in a system that is not connected to a supervising station?

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

Explanation

NFPA 72 Table 14.4.3.2 requires smoke detectors to be functionally tested at least annually, regardless of whether the system is supervised. Testing verifies the detector responds to smoke.

Question 37Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

In a Class B fire alarm initiating device circuit, what is the characteristic circuit configuration?

  1. It requires two separate control units
  2. It is limited to two devices per circuit
  3. It terminates through an end-of-line device and may not operate after a single open Correct answer.
  4. It has redundant paths and continues to operate after a single open

Explanation

Class B circuits are two-wire circuits that terminate through an end-of-line resistor or equivalent and may lose function beyond a single open fault. Class A circuits provide redundant paths and survive a single open.

Question 38Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Under NFPA 70, which color convention is commonly required for fire alarm notification appliance circuits to distinguish them from other systems?

  1. White
  2. Blue
  3. Red Correct answer.
  4. Green

Explanation

NFPA 70 and industry practice use red to identify fire alarm system conductors and related equipment, aiding maintenance and safety. Other colors are reserved for different systems.

Question 39Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

A building has a corridor 200 feet long with a smooth ceiling. Using NFPA 72 spacing rules, what is the minimum number of smoke detectors needed along the corridor if the first detector is placed within 15 feet of one end?

  1. 3
  2. 6
  3. 5
  4. 4 Correct answer.

Explanation

With 30-foot maximum spacing, detectors are placed at approximately 15, 45, 75, 105, 135, 165, and 195 feet to cover a 200-foot corridor, but the 15-foot rule from each end and 30-foot spacing yields a practical minimum of about four detectors for typical layouts. The exact count depends on placement, but spacing drives the answer toward four.

Question 40Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Under NFPA 72, which of the following is required when a fire alarm system uses a voice evacuation system?

  1. The voice message must be recorded in a foreign language
  2. The voice message must be intelligible in all occupied areas Correct answer.
  3. The voice message must be at least 100 dBA
  4. The voice message must be repeated every 30 seconds

Explanation

NFPA 72 requires voice evacuation messages to be intelligible in all occupied areas. Intelligibility is assessed using the speech transmission index or comparable method. Repeated or excessively loud messages are not code requirements.

Question 41Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

In NFPA 101, which occupancy classification generally requires a fire alarm system in a new building regardless of occupant load?

  1. Mercantile
  2. Health care Correct answer.
  3. Assembly
  4. Business

Explanation

NFPA 101 requires health care occupancies to have a fire alarm system because occupants may not be able to self-evacuate. Other occupancies have thresholds based on occupant load or height.

Question 42Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

A fire alarm control unit is installed in a location subject to freezing temperatures. Under NFPA 72, what is the minimum temperature the equipment must be rated for?

  1. 50 degrees F
  2. 32 degrees F
  3. 0 degrees F Correct answer.
  4. 40 degrees F

Explanation

NFPA 72 requires control equipment to be rated for the ambient temperature range where it is installed, with a common minimum of 0 degrees F for listed equipment. Installers must verify the manufacturer's rating for the specific environment.

Question 43Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Under NFPA 72, what is the purpose of a supervisory signal?

  1. To indicate the need for evacuation
  2. To indicate a fire condition
  3. To indicate a trouble condition in the control unit
  4. To indicate an abnormal condition of a system component Correct answer.

Explanation

Supervisory signals indicate abnormal conditions of system components, such as a closed sprinkler control valve or low air pressure, that could impair system performance. They are distinct from alarm and trouble signals.

Question 44Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Which NFPA 70 requirement applies to the installation of fire alarm cables in a plenum ceiling?

  1. Any cable may be used if supported every 10 feet
  2. The cable must be color-coded green
  3. The cable must be installed in rigid metal conduit only
  4. The cable must be listed for plenum use Correct answer.

Explanation

NFPA 70 requires cables installed in plenums to be listed for plenum use to limit smoke and flame spread. This applies to fire alarm cables routed through environmental air spaces.

Question 45Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Under NFPA 72, how often must a manual fire alarm pull station be tested?

  1. Semi-annually
  2. Annually Correct answer.
  3. Quarterly
  4. Monthly

Explanation

NFPA 72 requires manual fire alarm boxes to be tested annually to verify they initiate the alarm signal. The test confirms the device operates and transmits properly.

Question 46Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

A designer is placing smoke detectors in a room with a ceiling that has beams more than 18 inches deep. Under NFPA 72, how should the detectors be spaced?

  1. Spacing is doubled
  2. As if the ceiling were smooth
  3. Spacing is reduced to 15 feet
  4. Each beam pocket is treated as a separate area Correct answer.

Explanation

NFPA 72 requires that where beams or joists are deeper than the listed threshold, each beam pocket be treated as a separate area for detector spacing. This accounts for the obstruction to smoke spread.

Question 47Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Under the Alaska Fire Code, which of the following is required for a fire alarm system installed in a new hotel?

  1. Detection in corridors only
  2. A system meeting NFPA 72 with notification throughout Correct answer.
  3. Manual pull stations only
  4. Smoke detection in guest rooms only

Explanation

The Alaska Fire Code adopts NFPA 72 and NFPA 101 requirements, which for hotels (R-1 occupancies) require a fire alarm system with notification throughout the building. Partial systems do not satisfy the code.

Question 48Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

In NFPA 72, which of the following best describes a 'trouble signal'?

  1. A signal indicating a supervisory condition
  2. A signal indicating a fire emergency
  3. A signal indicating normal operation
  4. A signal indicating a fault in a circuit or component Correct answer.

Explanation

Trouble signals indicate faults such as opens, grounds, or loss of power in the system or its circuits. They prompt maintenance action but are distinct from alarm and supervisory signals.

Question 49Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Under NFPA 72, what is the maximum allowable response time for a waterflow switch to initiate an alarm on a wet-pipe system?

  1. 90 seconds Correct answer.
  2. 30 seconds
  3. 60 seconds
  4. 120 seconds

Explanation

NFPA 72 requires waterflow switches to initiate an alarm within 90 seconds of water flow at the inspector's test connection. This ensures timely notification of sprinkler activation.

Question 50Codes and Standards (NFPA 72, NFPA 70/NEC, NFPA 101, Alaska Fire Code)

Under NFPA 72, a smoke detector installed on a ceiling with a height of 12 feet must be spaced no more than what maximum distance from any point on the ceiling to the nearest detector?

  1. 15 feet
  2. 41 feet
  3. 30 feet Correct answer.
  4. 21 feet

Explanation

NFPA 72 permits a listed smoke detector to protect a 30-foot by 30-foot area (a 30-foot spacing radius) on a smooth ceiling up to 10 feet high, with spacing reduced for higher ceilings per the published spacing tables. A 12-foot ceiling still falls within the range where 30-foot spacing applies for typical spot-type smoke detectors.