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GA Fire Alarm practice questions

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Question 1Fire Alarm Systems

According to NFPA 72, which condition requires that a fire alarm system be monitored by a supervising station?

  1. When the protected premises has more than 50 initiating devices
  2. When the building is equipped with a voice evacuation system
  3. When the authority having jurisdiction requires a protected premises fire alarm system to transmit alarms off-premises Correct answer.
  4. When the system protects a building required to have a public fire alarm box

Explanation

NFPA 72 requires that where a protected premises fire alarm system is required to transmit alarms to an off-premises location, the means of transmission and supervising station must comply with the applicable chapter. The triggering condition is the off-premises transmission requirement imposed by the AHJ or governing code, not device count or the presence of voice evacuation.

Question 2Fire Alarm Systems

A technician is installing a manual fire alarm box in a corridor. What is the standard mounting height range for the operable portion of the pull station?

  1. 60 in to 72 in above the finished floor
  2. 42 in to 48 in above the finished floor Correct answer.
  3. 24 in to 36 in above the finished floor
  4. 12 in to 18 in above the finished floor

Explanation

NFPA 72 requires the operable portion of a manual fire alarm box to be mounted not less than 42 in and not more than 48 in above the finished floor. This range keeps the device reachable for the general population, including many wheelchair users.

Question 3Fire Alarm Systems

Which detector type is generally the most appropriate choice for a room where a small, smoldering, slow-developing fire is expected and the ambient air is clean?

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

Explanation

Photoelectric detectors respond more readily to visible smoke particles produced by smoldering fires. Ionization detectors tend to respond better to flaming fires with small particles, and heat detectors require the fire to generate substantial heat before operating.

Question 4Fire Alarm Systems

What does the term 'supervisory signal' describe in a fire alarm system?

  1. A signal indicating normal AC power is present
  2. A signal indicating that an alarm has been acknowledged at the panel
  3. A signal indicating that the fire department has arrived on scene
  4. A signal indicating an off-normal condition in a system component that could impair operation Correct answer.

Explanation

NFPA 72 defines a supervisory signal as an indication of a problem with a system component or a protected premises condition that, if uncorrected, could impair the system's ability to perform its intended function. Common examples include valve tamper switches, low water level, and low air pressure.

Question 5Fire Alarm Systems

A duct smoke detector is installed in a return air duct. Which statement correctly describes its intended function?

  1. It is required to be cross-zoned with a second duct detector before alarm
  2. It serves as a substitute for area smoke detection in the protected space
  3. It is intended to control smoke spread through the HVAC system and initiate shutdown or other action Correct answer.
  4. It provides early warning to building occupants in the same manner as area detectors

Explanation

NFPA 72 states that duct-mounted detectors are intended primarily to detect smoke in the air duct and initiate actions such as equipment shutdown to limit smoke spread. They are not a substitute for open-area detection and are not intended to provide occupant warning.

Question 6Fire Alarm Systems

For a spot-type heat detector with a listed spacing of 50 ft on a smooth, flat ceiling, what is the maximum permitted spacing when the detector is installed 4 in from a side wall?

  1. 50 ft
  2. 12 ft
  3. 25 ft Correct answer.
  4. 35 ft

Explanation

NFPA 72 reduces the allowable spacing when detectors are placed close to walls. For a detector located within the first 4 in of a side wall, the permitted spacing is one-half the listed spacing. Thus a 50 ft listed spacing becomes 25 ft.

Question 7Fire Alarm Systems

What is the primary purpose of a waterflow switch in a wet-pipe sprinkler system as it relates to the fire alarm system?

  1. To monitor the pressure in the system's air compressor
  2. To supervise the position of the main control valve
  3. To sound a local trouble buzzer at the riser
  4. To detect the flow of water indicating that a sprinkler has operated Correct answer.

Explanation

A waterflow switch detects sustained water movement in the piping, which indicates that one or more sprinklers have operated or that a valve has opened. It is an alarm-initiating device, distinct from valve tamper switches that supervise valve position.

Question 8Fire Alarm Systems

A valve tamper switch on a sprinkler control valve is intended to produce which type of signal at the fire alarm control unit?

  1. An alarm signal
  2. A notification signal
  3. A supervisory signal Correct answer.
  4. A trouble signal

Explanation

A tamper switch monitors the open position of a control valve. Closing or partially closing the valve produces a supervisory signal, because an off-normal valve position can impair system performance. It is not an alarm signal because no fire condition has been detected.

Question 9Fire Alarm Systems

In a protected premises system, what does the 'alarm verification' feature do?

  1. It delays alarm processing until a second detector in the same zone operates
  2. It resets the detector and rechecks for an alarm condition within a set time period before transmitting an alarm Correct answer.
  3. It verifies that notification appliances are producing the required sound level
  4. It confirms that an alarm signal has reached the supervising station

Explanation

Alarm verification is a feature that, upon receiving an alarm signal, resets the initiating device circuit and waits a defined period to see whether the alarm recurs before transmitting. Its purpose is to reduce nuisance alarms from transient conditions such as dust or smoke.

Question 10Fire Alarm Systems

Which of the following is the correct description of a 'cross-zoned' detection arrangement?

  1. Two detectors in the same zone must both alarm before an alarm is transmitted
  2. Detectors are alternately connected to two different initiating device circuits for redundancy
  3. Detectors in two different zones must both alarm before an alarm is transmitted Correct answer.
  4. Detectors are wired in a loop so that a single open does not disable the circuit

Explanation

Cross-zoning requires that detectors in at least two different zones both operate before the system transmits an alarm. This arrangement is often used with smoke detectors in spaces where nuisance alarms are a concern, such as elevator lobbies or computer rooms.

Question 11Fire Alarm Systems

What is the required minimum sound pressure level for a public mode fire alarm notification appliance in a room with an ambient sound level of 55 dBA?

  1. 70 dBA
  2. 80 dBA
  3. 75 dBA Correct answer.
  4. 65 dBA

Explanation

NFPA 72 requires that public mode audible alarm signals be at least 15 dBA above the ambient sound level or 5 dBA above the maximum sound level lasting 60 seconds or more, whichever is greater. With a 55 dBA ambient, 55 plus 15 equals 70 dBA; however, the code also sets a minimum floor of 75 dBA for public mode, so 75 dBA governs.

Question 12Fire Alarm Systems

A visible notification appliance is installed in a corridor. According to NFPA 72, what is the maximum permitted mounting height for the top of the appliance?

  1. 96 in above the finished floor Correct answer.
  2. 72 in above the finished floor
  3. 80 in above the finished floor
  4. 110 in above the finished floor

Explanation

NFPA 72 permits visible notification appliances to be mounted at various heights, but the top of the appliance must not exceed 96 in above the finished floor. This limit helps ensure that the strobe remains visible to occupants in the space.

Question 13Fire Alarm Systems

What is the required candela rating for a visible notification appliance installed in a corridor that is 8 ft wide?

  1. 30 cd Correct answer.
  2. 15 cd
  3. 110 cd
  4. 75 cd

Explanation

NFPA 72 Table 18.5.5.4.1(a) lists minimum candela ratings based on corridor width. For a corridor 8 ft wide, the required rating is 30 cd, provided the appliance is mounted within 6 in of the ceiling and the corridor is not more than 20 ft wide.

Question 14Fire Alarm Systems

Which of the following best describes the function of an addressable initiating device circuit (SLC) in a fire alarm system?

  1. It limits the number of devices to one per circuit
  2. It provides a direct connection between a manual pull station and the notification appliance circuit
  3. It provides a communication path that allows the control unit to identify each device individually Correct answer.
  4. It supplies power to notification appliances and monitors their operation

Explanation

A signaling line circuit is a communication pathway between the control unit and addressable devices. Each device has a unique address, allowing the control unit to identify the specific device that has operated or is in trouble.

Question 15Fire Alarm Systems

What is the purpose of a Class A initiating device circuit?

  1. It provides a single path so that a single open disables the circuit
  2. It permits the control unit to identify each device individually
  3. It provides a redundant path so that a single open does not disable the circuit Correct answer.
  4. It provides power to notification appliances during an alarm

Explanation

A Class A circuit has a redundant path and continues to operate when a single open occurs. Class B circuits have a single path and are subject to loss of function from a single open. Individual device identification is a function of addressable systems, not circuit class.

Question 16Fire Alarm Systems

A technician is testing a supervised fire alarm circuit. Which condition should cause the control unit to indicate a trouble signal?

  1. A manual pull station is activated
  2. A sprinkler waterflow switch operates
  3. An open occurs in the circuit wiring Correct answer.
  4. A smoke detector reports an alarm

Explanation

Supervision is intended to detect faults in the circuit that could prevent the system from operating. An open in the circuit wiring is a fault and should produce a trouble signal, while detector alarms, manual pull station activations, and waterflow switch operations are alarm conditions.

Question 17Fire Alarm Systems

How often must a fire alarm system's primary power supply be tested under NFPA 72?

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

Explanation

NFPA 72 Table 14.4.3.2 requires that the primary power supply of a fire alarm system be tested annually. Secondary power supplies, such as batteries, have their own testing frequencies, including a monthly inspection of the battery condition.

Question 18Fire Alarm Systems

During a battery test, a technician finds that the secondary power supply cannot operate the system for the required duration. What is the most likely cause?

  1. The control unit is connected to a supervising station
  2. The initiating devices are addressable
  3. The batteries are undersized or have degraded capacity Correct answer.
  4. The notification appliance circuit is Class A

Explanation

The secondary power supply must be capable of operating the system for the code-required duration under the calculated load. Failure to meet the duration usually indicates that the batteries are undersized for the load or have lost capacity and need replacement.

Question 19Fire Alarm Systems

Which of the following is a correct statement about the location of smoke detectors in a room with a suspended ceiling?

  1. Detectors must be installed only in the return air plenum
  2. Detectors may be installed on the ceiling or, where listed, in the ceiling tile Correct answer.
  3. Detectors must always be installed above the suspended ceiling
  4. Detectors must be installed at least 36 in below the ceiling

Explanation

NFPA 72 permits spot-type smoke detectors to be mounted on the ceiling or, where the detector is listed for the purpose, recessed in or mounted to the ceiling tile. The key is that the detector must be in the listed location and within the spacing rules.

Question 20Fire Alarm Systems

What is the purpose of the 'trouble signal' on a fire alarm control unit?

  1. To indicate that a notification appliance has operated
  2. To indicate that a fire condition has been detected
  3. To indicate that the system has been placed in test mode
  4. To indicate an off-normal condition that could impair the system's operation Correct answer.

Explanation

A trouble signal indicates a fault or off-normal condition in the system that could impair its ability to perform its intended function. Examples include circuit opens, ground faults, and loss of primary power.

Question 21Fire Alarm Systems

A fire alarm system is installed in a building with a sprinkler system. Which device is required to be connected to the fire alarm system to monitor the position of the main control valve?

  1. A waterflow switch
  2. A valve tamper switch Correct answer.
  3. A flow test valve
  4. A pressure switch

Explanation

A valve tamper switch is used to supervise the position of a control valve so that the fire alarm system can signal a supervisory condition if the valve is not fully open. Waterflow switches detect water movement, and pressure switches monitor pressure, not valve position.

Question 22Fire Alarm Systems

Which of the following best describes the purpose of an annunciator in a fire alarm system?

  1. To provide a remote display of system status and device information Correct answer.
  2. To sound the audible alarm in the protected space
  3. To supply backup power to the control unit
  4. To detect smoke in the protected space

Explanation

An annunciator is a remote display unit that shows system status, alarm, supervisory, and trouble conditions, often with device-level information in addressable systems. It does not detect fire, supply power, or replace notification appliances.

Question 23Fire Alarm Systems

A smoke detector is installed near a kitchen. Which condition is most likely to cause nuisance alarms?

  1. A loss of primary power
  2. Normal cooking smoke and grease particles Correct answer.
  3. A decrease in ambient temperature
  4. A change in the building's occupancy

Explanation

Smoke detectors near cooking areas are prone to nuisance alarms from cooking smoke, grease, and steam. NFPA 72 includes spacing and location rules to avoid placing detectors where normal cooking or other activities produce conditions that could be interpreted as smoke.

Question 24Fire Alarm Systems

What is the required minimum duration for the secondary power supply of a fire alarm system to operate the system under the calculated load in a protected premises system?

  1. 60 hours
  2. 15 minutes
  3. 24 hours Correct answer.
  4. 5 minutes

Explanation

NFPA 72 requires the secondary power supply to be capable of operating the system for 24 hours under the calculated load, followed by 5 minutes of alarm operation at the end of that period. The 24-hour duration ensures the system remains functional during a prolonged primary power outage.

Question 25Fire Alarm Systems

A technician is commissioning a fire alarm system and needs to verify that the visible notification appliances meet the required candela rating in a 10 ft wide corridor. Which value applies?

  1. 110 cd
  2. 15 cd
  3. 75 cd Correct answer.
  4. 30 cd

Explanation

NFPA 72 Table 18.5.5.4.1(a) specifies a minimum of 75 cd for a corridor 10 ft wide when the appliance is mounted within 6 in of the ceiling. Corridors wider than 10 ft require higher ratings according to the table.

Question 26Fire Alarm Systems

On a supervised fire alarm circuit, a technician temporarily removes a field device and observes a trouble indication at the control unit. Which electrical principle makes this supervision possible?

  1. The circuit carries a small supervisory current through an end-of-line device that is interrupted when the circuit opens Correct answer.
  2. The circuit transmits a coded signal from each device only during an alarm condition
  3. The circuit uses an isolation resistor at the panel to detect ground faults on the enclosure
  4. The circuit relies on a normally open contact that closes whenever a device is removed

Explanation

Supervision works by passing a small current through the circuit and an end-of-line device; an open, short, or ground fault changes that current and produces a trouble signal. Devices do not need to signal only during alarm, and supervision is not limited to ground faults.

Question 27Fire Alarm Systems

A duct smoke detector is installed in the return air duct of an air-handling unit. What is the primary function of this detector in the fire alarm system?

  1. To control the shutdown of the air-handling unit and help prevent smoke circulation through the building Correct answer.
  2. To satisfy the sprinkler system's waterflow alarm requirement in the return air plenum
  3. To provide early warning of a fire in the ductwork itself before smoke reaches the occupied space
  4. To serve as the required area smoke detection for the occupied space served by the duct

Explanation

Duct detectors are installed to detect smoke in the air stream and, through the fire alarm system, shut down the air-handling unit to limit smoke spread. They are not a substitute for area detection of the occupied space.

Question 28Fire Alarm Systems

A manual fire alarm box is being located along a normal egress path in a commercial building. Which installation consideration most directly affects whether occupants can find and operate it during an emergency?

  1. Placing it only at the main entrance so all occupants pass it once
  2. Installing it above the suspended ceiling to protect it from damage
  3. Mounting it at a consistent, accessible height along the path of travel with clear visibility Correct answer.
  4. Locating it inside a locked electrical closet near the exit

Explanation

Manual stations must be conspicuous, unobstructed, and mounted at a consistent accessible height along the means of egress so occupants can activate them quickly. Concealment or unusual locations defeat that purpose.

Question 29Fire Alarm Systems

Which device is used to detect the flow of water in a sprinkler system and send an alarm signal to the fire alarm control unit?

  1. Waterflow switch Correct answer.
  2. Pressure switch
  3. Solenoid valve
  4. Tamper switch

Explanation

A waterflow switch senses movement of water in the sprinkler piping and initiates an alarm signal. A pressure switch monitors pressure, a tamper switch monitors valve position, and a solenoid valve controls flow.

Question 30Fire Alarm Systems

In a protected premises fire alarm system, which signal category is intended to indicate a fault in the system wiring or a device failure rather than a fire condition?

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

Explanation

A trouble signal indicates an abnormal condition such as an open circuit, ground fault, or device failure that may impair system operation. Alarm signals indicate fire, supervisory signals indicate off-normal conditions such as closed valves, and notification signals alert occupants.

Question 31Fire Alarm Systems

Which of the following best describes the role of an addressable smoke detector on a signaling line circuit?

  1. It must be wired on a dedicated conventional zone circuit separate from other devices
  2. It operates only when the control unit polls it during an alarm condition
  3. It reports its own unique address and status to the control unit over the shared circuit Correct answer.
  4. It requires a separate power circuit because the signaling line circuit cannot carry device power

Explanation

Addressable devices each have a unique identifier and communicate status over the shared signaling line circuit, allowing the panel to identify the specific device in alarm or trouble. They are not restricted to dedicated zones, and polling occurs continuously during normal operation.

Question 32Fire Alarm Systems

What is the purpose of a fire alarm control unit's 'alarm silence' function?

  1. To disable the initiating circuits so no further alarms are received
  2. To silence the notification appliances while the alarm condition remains indicated at the panel Correct answer.
  3. To reset all initiating devices and clear the alarm from memory
  4. To disconnect the primary power supply and transfer to battery

Explanation

Alarm silence stops the audible notification appliances while the alarm condition and indication remain at the control unit until the system is reset. It does not clear the alarm or disable detection.

Question 33Fire Alarm Systems

A technician is preparing to test a fire alarm system. Which document should be consulted to determine the specific test methods and acceptance criteria for each device?

  1. The electrical panel schedule
  2. The sprinkler system hydraulic calculations
  3. The manufacturer's published installation and maintenance instructions Correct answer.
  4. The building's occupancy permit

Explanation

Manufacturer instructions provide the specific test methods and acceptance criteria for each device, and they are the basis for proper inspection and testing. Other building documents do not define device test procedures.

Question 34Fire Alarm Systems

A designer is laying out spot-type smoke detectors on a smooth ceiling with a 10 ft ceiling height. Which factor most directly determines the maximum spacing between detectors?

  1. The color of the ceiling finish
  2. The building's construction type
  3. The detector's listed spacing and the ceiling height adjustment Correct answer.
  4. The number of occupants in the room

Explanation

Detector spacing is based on the manufacturer's listed spacing adjusted for ceiling height, with the height affecting how smoke accumulates and spreads at the detector. Ceiling color, occupant load, and construction type do not set detector spacing.

Question 35Fire Alarm Systems

A smoke detector is being considered for installation in a room with a ceiling that slopes upward toward a ridge. Where should the detector generally be placed to respond most effectively?

  1. On the wall at the base of the slope
  2. Near the high point of the ceiling where smoke accumulates Correct answer.
  3. At the midpoint of the slope regardless of the ridge
  4. At the lowest point of the sloped ceiling

Explanation

Smoke tends to rise and collect near the highest portion of a sloped ceiling, so detectors are generally placed near the ridge or high point. Placing them at the low point or arbitrary midpoint delays response.

Question 36Fire Alarm Systems

A technician is verifying that a notification appliance circuit is properly supervised. Which condition should the control unit be capable of detecting on the circuit?

  1. A change in the ambient sound level of the protected space
  2. A short circuit or open circuit in the notification appliance wiring Correct answer.
  3. The position of a manual fire alarm box cover
  4. A reduction in the building's water pressure

Explanation

Notification appliance circuits are supervised so that opens and shorts in the wiring are detected and indicated as trouble conditions. Ambient sound, water pressure, and station cover position are outside the scope of that supervision.

Question 37Fire Alarm Systems

A fire alarm system is being installed in a high-rise building. Which feature allows the fire department to control certain system functions from a designated location?

  1. A remote annunciator located in the lobby
  2. A waterflow switch on the riser
  3. A fire command center with fire department communication and control capability Correct answer.
  4. A duct smoke detector in the elevator machine room

Explanation

A fire command center provides the fire department with communication and control functions for the building's fire protection systems. Annunciators display status, but the command center provides the broader control and communication capability.

Question 38Fire Alarm Systems

A technician is setting up a voice evacuation system. Which function is essential for delivering intelligible voice messages during an emergency?

  1. A means to override background sound and deliver a clear message through speakers in the protected area Correct answer.
  2. A means to silence all speakers immediately after the first message
  3. A means to route the message only to the fire command center
  4. A means to reduce speaker output below ambient sound levels

Explanation

Voice evacuation systems must deliver intelligible messages that can be heard and understood above background sound. Speakers must cover the protected area, and messages must not be silenced prematurely or confined to the command center.

Question 39Fire Alarm Systems

A technician observes that a supervisory signal is present at the fire alarm control unit for a sprinkler system control valve. What does this condition most likely indicate?

  1. The fire alarm system has lost primary power
  2. A sprinkler head has fused and water is flowing
  3. The control valve has been moved from its normal open position Correct answer.
  4. A smoke detector has gone into alarm

Explanation

A supervisory signal from a valve tamper switch indicates that a control valve is not in its normal position, which could impair sprinkler performance. Waterflow would produce an alarm signal, not a supervisory signal.

Question 40Fire Alarm Systems

A designer is selecting a secondary power supply for a fire alarm system. Which factor determines the required battery capacity?

  1. The number of initiating devices only
  2. The number of notification appliances only
  3. The building's square footage only
  4. The standby load plus the alarm load for the required duration Correct answer.

Explanation

Battery capacity must support the standby load and the alarm load for the required duration, accounting for both quiescent and alarm currents. Device counts alone or building size alone do not determine capacity.

Question 41Fire Alarm Systems

A technician is testing the response of a photoelectric smoke detector. Which condition is most likely to cause a false alarm in a photoelectric detector?

  1. Dust or airborne particles entering the sensing chamber Correct answer.
  2. A change in the building's barometric pressure
  3. A rapid rise in ambient temperature
  4. A decrease in the supply voltage

Explanation

Photoelectric detectors respond to light scattered by particles, so dust or other airborne contaminants in the chamber can cause false alarms. Temperature rise is detected by heat detectors, and barometric pressure is not a typical false alarm source for this detector type.

Question 42Fire Alarm Systems

A technician is testing a heat detector that uses a rate-of-rise element. What condition should cause this detector to initiate an alarm?

  1. A drop in temperature below freezing
  2. A constant temperature at the set point
  3. A rapid increase in temperature above a set rate Correct answer.
  4. A slow, steady temperature rise over many hours

Explanation

A rate-of-rise heat detector responds to a rapid temperature increase that exceeds a set rate, independent of reaching a fixed temperature. Slow changes and constant temperatures do not trigger the rate element.

Question 43Fire Alarm Systems

A fire alarm system uses a Class A initiating device circuit. Which characteristic distinguishes it from a Class B circuit?

  1. The circuit uses only two wires and cannot be tapped
  2. The circuit is permitted to be unsupervised during normal operation
  3. The circuit continues to operate with initiating devices on both sides of a single open fault Correct answer.
  4. The circuit is limited to a single initiating device

Explanation

A Class A circuit is arranged so that an open fault in the wiring does not prevent operation of initiating devices on the remaining portion of the circuit. Class B circuits lose supervision beyond an open fault.

Question 44Fire Alarm Systems

A technician is commissioning a fire alarm system and must verify that the audible notification appliances meet the required sound pressure level in the protected space. Which measurement approach is appropriate?

  1. Measure the sound level at the control unit only
  2. Measure the sound level in the adjacent building only
  3. Measure the sound level at the speaker terminals with a voltmeter
  4. Measure the sound level at the required locations with the system operating and compare to the ambient sound level Correct answer.

Explanation

Audible appliances must produce a sound level at the required locations that exceeds the ambient sound level by the specified margin, so measurements are taken in the protected space with the system operating. Measurements at the panel or terminals do not verify occupant notification.

Question 45Fire Alarm Systems

A designer is evaluating whether to use cross-zoned detection in a high-value area. What is the primary benefit of this arrangement?

  1. It allows a single detector to serve as both detection and notification
  2. It reduces the likelihood of an alarm from a single detector's false activation by requiring more than one zone to respond Correct answer.
  3. It eliminates the need for notification appliances in the area
  4. It increases the sensitivity of each individual detector

Explanation

Cross-zoning requires detection from more than one zone before an alarm is initiated, which reduces nuisance alarms from a single device. It does not change individual detector sensitivity or eliminate notification requirements.

Question 46Fire Alarm Systems

A technician is troubleshooting a ground fault on a fire alarm circuit. Which condition is most likely to be indicated as a trouble by the control unit?

  1. A normal supervisory current through the end-of-line device
  2. A change in the building's occupancy
  3. An alarm activation of a manual station
  4. An unintended connection between a circuit conductor and ground Correct answer.

Explanation

A ground fault occurs when a circuit conductor unintentionally connects to ground, which the control unit detects and reports as a trouble condition. Normal supervisory current and alarm activations are not ground faults.

Question 47Fire Alarm Systems

A fire alarm system is being designed for a building with a sprinkler system and a fire pump. Which signal should the fire alarm system monitor from the fire pump controller?

  1. Pump running and pump power failure conditions Correct answer.
  2. The number of sprinkler heads installed
  3. The building's occupancy load
  4. The color of the pump room walls

Explanation

Fire alarm systems monitor fire pump status signals such as pump running and loss of power so that the fire department and building staff are aware of pump operation or impairment. The other items are unrelated to pump monitoring.

Question 48Fire Alarm Systems

A technician is evaluating a detector's response in a space with high airflow from an HVAC supply diffuser. Which placement consideration is most important?

  1. Installing the detector directly in the supply air stream for maximum sensitivity
  2. Mounting the detector on the diffuser face
  3. Locating the detector away from the direct air stream so smoke is not diluted or blown past it Correct answer.
  4. Reducing the detector's sensitivity setting to compensate for airflow

Explanation

High airflow can dilute smoke or carry it past a detector, so detectors should be located away from direct discharge from diffusers. Mounting on or in the air stream can delay response, and sensitivity changes do not correct the placement problem.

Question 49Fire Alarm Systems

A technician is verifying the operation of a fire alarm system's primary power supply. Which condition should the system be capable of indicating?

  1. The exact battery manufacturer
  2. The number of occupants present
  3. The building's utility meter reading
  4. Loss of primary power with automatic transfer to the secondary supply Correct answer.

Explanation

The fire alarm system must indicate loss of primary power and transfer automatically to the secondary supply to maintain operation. Battery manufacturer, utility meter readings, and occupancy are not system indications.

Question 50Fire Alarm Systems

A designer is considering the use of a projected beam smoke detector in a large open space. Which condition is most important for reliable operation?

  1. Installing the detector at floor level
  2. Maintaining a clear, stable path between the transmitter and receiver without obstruction or significant building movement Correct answer.
  3. Reducing the ceiling height below the detector
  4. Ensuring the space is fully sprinklered

Explanation

Projected beam detectors require a clear, stable optical path between transmitter and receiver; obstructions or significant structural movement can cause misalignment and unreliable operation. Floor-level mounting and sprinkler presence do not address beam alignment.