56 Questions
What types of fires are powder fire extinguishers effective at combating?
Class A, B, and C fires
Where should powder fire extinguishers not be used?
On fires involving cooking
How is the powder in a powder fire extinguisher released?
By a compressed gas
What is the main function of the powder once it is released from the extinguisher?
To create a barrier between the fire and oxygen
In which environments are powder fire extinguishers ideal to use?
Multi-risk environments
Which component in a conventional fire alarm system is responsible for detecting high temperatures?
Heat Detector
What is one advantage of a conventional fire detection and alarm system?
Lower initial equipment costs
Which element is NOT part of the conventional fire alarm system as shown in the image?
Addressable Unit
Which component is common in both conventional and semi-addressable fire alarm systems?
Control Panel
In a semi-addressable fire detection and alarm system, what is the purpose of the Zone Module?
To connect addressable and conventional detectors
What information advantage does an addressable detector provide over a conventional detector?
More detailed location information
Automatic Fire Extinguishers are designed to handle which types of fires?
Class A, B, and C fires
Which type of fire is an Automatic Fire Extinguisher NOT suitable for?
Cooking oil fires
What makes Automatic Fire Extinguishers ideal for environments where manual operation is not always possible?
They release an extinguishing agent to protect a certain square footage automatically.
For which of the following environments are Automatic Fire Extinguishers particularly suitable?
Boat engine bays
What type of extinguisher should you use for fires involving cooking oil or fat?
Wet Chemical Fire Extinguishers
Which of the following is a feature of addressable fire alarm systems?
More system status information at the panel
What is a characteristic of conventional fire alarm systems?
Heat and smoke detectors are grouped into zones
Which type of fire alarm system generally allows for more expansion?
Addressable system
What advantage does the addressable fire alarm system have regarding installation?
Easier to install
Which of the following is an advantage of conventional fire alarm systems?
Provides information to personnel about the location of a fire
Which statement accurately differentiates addressable from conventional fire alarm systems?
Addressable systems allow for more flexible input/output programming.
Which type of fire is a water fire extinguisher NOT suitable for?
Class B fires
What is a danger associated with using a powder fire extinguisher?
It should not be used on fires involving cooking.
How do CO2 fire extinguishers work?
They release CO2 to replace oxygen around the burning material.
Which class of fires are best extinguished by CO2 fire extinguishers?
Class B
Which fire extinguisher is suitable for fires involving electrical appliances?
CO2 fire extinguisher
Why should CO2 fire extinguishers not be used on Class A fires?
They do not have a long-lasting cooling effect.
For which type of fire should a CO2 fire extinguisher be used?
Fires involving electrical appliances
How does a CO2 fire extinguisher extinguish flames?
By smothering it and cutting off its oxygen supply
Which of these fires should NOT be addressed with a CO2 fire extinguisher?
Fires involving wood and paper
Which category of fire is CO2 fire extinguishers best suited for besides electrical fires?
Class B
What is a notable danger associated with using CO2 fire extinguishers?
They should not be used on fires involving solid materials
What is the main purpose of a backup power supply in a fire alarm system?
To keep the system running during a power failure
Which type of batteries are typically used in the backup power supply for fire alarm systems?
6- or 12-volt batteries
What is a major advantage of addressable FDAS systems?
They can pinpoint the exact location of the activated device
How do addressable FDAS systems benefit emergency responders?
By displaying the location of the activated device
Addressable FDAS systems are beneficial for repair personnel because they allow them to:
Quickly locate and correct system malfunctions
What is typically displayed on the FACU and annunciator panel in an addressable FDAS?
The location of each initiating device
Which of the following fire classes are foam fire extinguishers effective against?
Class A and Class B
Which of the following devices is NOT typically used for fire notification?
Speakers
What is the primary mechanism by which foam fire extinguishers suppress fires?
Suffocation and sealing the surface
What type of power supply is primarily used for fire alarm systems?
120-or 240-volt AC
Which type of environment can benefit from the use of foam fire extinguishers?
Office spaces with paper and wood
What additional benefit does foam provide besides smothering the fire?
It reduces the temperature of the fire
What is the primary function of the fire alarm control panel?
To act as the brain monitoring and managing initiation devices
What typically charges the battery backup for a fire alarm system?
Primary power supply
How does the foam in a fire extinguisher prevent the spreading of fires?
It prevents stray materials from igniting
What happens when an initiation device is triggered in a fire alarm system?
A signal is sent to the control panel, which activates the notification devices
Which component of the fire alarm system provides visual indication of system status?
Fire alarm control panel
What type of fire alarm initiating device is a pull station?
Manual initiating device
Which type of device triggers the fire alarm system automatically based on environmental changes?
Automatic initiating device
What is the purpose of fire alarm notification devices?
To notify building occupants when a fire is detected
Which of the following is NOT an automatic initiating device?
Pull station
Why do manual initiating devices need to be well marked and accessible?
To ensure easy identification and use
Which device typically sends a signal to a central control panel when a fire is detected?
Smoke detector
Study Notes
Fire Alarm Systems
- A conventional fire alarm system consists of various components, including air sampling detectors, smoke detectors, heat detectors, manual pull stations, control panels, supervisory inputs, wall mount control panels, end of lines, annunciators, and trouble devices.
- Advantages of conventional fire alarm systems include lower initial equipment costs, a wide range of compatible devices, ease of programming, and limited expansion capability.
Semi-Addressable Fire Detection and Alarm System
- A semi-addressable fire detection and alarm system combines addressable and conventional detectors to provide more detailed information about the location of a fire.
- The system consists of addressable units, conventional units, zone modules, control modules, and alarm devices.
Automatic Fire Extinguishers
- Automatic fire extinguishers are designed to put out Class A, B, and C fires, involving solids, flammable liquids, and electrical equipment.
- They are ideal for environments where manual operation is not possible, and immediate activation is necessary.
Types of Fire Extinguishers
- Water fire extinguishers are best for Class A fires, involving organic solid materials, but should not be used on burning fat or oil, or electrical appliances.
- Powder fire extinguishers are effective against Class A, B, and C fires, and are suitable for electrical fires.
- CO2 fire extinguishers are best for Class B and C fires, but should not be used on Class A fires.
- Foam fire extinguishers are effective against both Class A and Class B fires, involving solids and flammable liquids.
Backup Power Supply
- A backup power supply is essential in case of a power failure, using 6- or 12-volt batteries to keep the system running.
Addressable Fire Alarm Systems
- Addressable systems display the location of each initiating device on the FACU and annunciator panel, enabling emergency responders to quickly respond to emergencies.
- These systems reduce response time and allow repair personnel to quickly locate and correct malfunctions.
Fire Alarm Components
- Fire notification devices, such as bells, strobes, horns, and chimes, notify building occupants in case of a fire.
- The fire alarm control panel is the central hub of the system, monitoring and managing initiation devices and activating notification devices.
- The primary power supply is typically 120- or 240-volt AC power sources, while the backup power supply provides power in case of a power outage.
Identify the components of a conventional fire alarm system architecture and understand the advantages of using this type of system. Learn about the devices and their functions in a fire alarm system.
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