26405-20 - Fire Alarm Systems
Phase __ recall is the method of recalling the elevator to the floor that provides the highest probability of safe evacuation in the event of a fire emergency.
1
As defined by NFPA 72, standby time for operation of the system on secondary power must be no less than _______ for central, local, proprietary, voice communications, and household systems
24 hours
How many minutes must a Fire Alarm system operate in alarm on battery backup?
4,5, or 15 depending on the system
What is to typical spacing for heat detectors?
50' x 50'
What is the typical ambient sound within an mechanical room?
85 dBA
All residential alarm sounding devices have an minimum dB rating of
85dBA
Sidewall mounted audible notification devices must be mounted at least _____ AFF level or 6" below finished ceiling.
90"
Secondary power for an fire alarm system can be provided by
A battery or approved backup generator
UL requires that any system controls that affect system operation be protected behind
A locked door or locked out by an key
Attendant signaling is used where assisted evacuation is required due to such factors as
Age, disability, and restraint
This device consists of piping or tubing distributed from the detector unit to the area(s) to be protected. An air pump draws air from the protected area back to the detector through air ports and piping or tubing.
Air sampling detector
Which of the following is NOT a type of pull station?
Automatic Pull Station
Monitoring facilities that are constructed and operated according to a standard and are inspected by a listing agency to verify compliance.
Certified central station
An ionization dector does what to detect smoke?
Changes in electrical conductivity of air
In addressable or analog addressable systems, there are two basic wiring or circuit types
Class A and B
The simplest fire alarm system is
Conventional hardwired system
Three major types of fire alarm systems are
Conventional hardwired, multiplex, Addressable intelligent
National Electrical Manufacturers' Association establishes standards for what?
Equipment
What cable is required when running from floor to floor?
FPLR
Where is verification commonly used?
Hospitals
Which detector is best in the incipient stage of an fire
Ionization dector
How does an addressable FACP work?
It polls the SLC wiring and devices constantly, comparing information.
The NFPA 101 is also
Life Safety Code
What does the term "dry contact" refer to?
N.O. or N.C. contacts with no voltage present
When does NFPA permit remote resetting of fire alarm systems that have signaled an alarm
Never
The function of a duct detector is ______?
Shut down of HVAC equipment
Who is AHJ?
State Fire Marshal, Authority Having Jurisdiction, Local Fire Chief
When monitoring a control valve on a sprinkler system, what type of signal is sent to the FACP when the valve changes state?
Supervisory
The code requires that this pattern be used in accordance with ANSI standard 53.41
Temporal-three signal
NFPA 90A is the standard for
The Installation of Air Conditioning and Ventilating Systems
The NFPA 72 covers what?
The recommended requirements for installation of fire alarm systems and equipment in residential and commercial facilities
Why are strobe lights more effective in residential, industrial, and office areas
They don't compete with other bright objects
A Temporal Three signal consists of _______?
Three short ½-second tones with ½-second pauses, 1-second silent period ,then repeats
What happens if a initiating device is removed from a SLC circuit?
Trouble
Analog addressable systems operate on
Two conductor
Establishes standards for fire equipment and systems.
Underwriters Laboratories
Upon activation of the fire alarm, stair enclosure doors must
Unlock to permit egress
What action needs to happen to activate a flow switch?
Waterflow
What are the basics of a Conventional Hardwired System?
Zone detection only, general descriptions.
