Fire Alarm Test 1 Flashcards
Three types of fire alarm notification
- Trouble
- Alarm
- Supervisory
Are detectors rest able t or f?
True
What action cause a fire panel to display an alarm
Actual fire
Can a residential smk be on a separate circuit
No
What does NAC mean
Notification appliance cct
What does IDC mean
Initiation device circuit
Is CEC not required for fire alarm T or F?
False
If one sprinkler in a wet system goes off, do all of them go off T or F?
False
Define supervisory CCT?
Minimum size of 4 wire
22 AWG
Is Elevator recall supervised
NO
In class b, where is the last device
In the field (EOL)
Can you run wires in the same conduit
No
Residential smk can be connected to?
Lighting cct
Fire alarm have to 2 over riding purposes?
Eliminate injury and property damage
4 types of fire alarm system
Local, auxiliary proprietary and central station
What constitutes a fire alarm input
Smk detectors, heat sensors, pull stations
Outputs wired to the controller include?
Horns, bells, strobes or speakers
Where is the Annunciator is located
Main entrance or selected areas
4 stages of a fire
Incipient stage ( ionization smk)
Smouldering stage (photoelectric)
Flame stage (flame detector)
Heat stage( thermal detector)
Define photoelectric smk detector
Detects during 2nd stage of a fire
It has a circular chamber with overlapping porous cover
In a two stage after 5 minutes of being in alert mode it turns to alarm mode T OR F?
True
What would happen if, In a initiation cct a device or a connection came apart
Shows a trouble signal
What the minimum height of a pull sation
1050mm to 1150mm
In a stair well, how often does a smk need to be placed
Every third floor (18 m)
When is a voice communication required by code
Over 3 stories (36m)
What are some of the systems that would be considered ancillary
HVAC systems, elevator recall
What’s the purpose of ancillary cct
To send control signals to other building
What are 2 signal required for elevator recall
Tell the elevator to return to its normal parking floor, if there’s a problem on this floor it will send it to an alternate floor.
What’s temp is orange rated for in sprinkler system
57 degree
Wet pipe sprinkler
Water is constantly maintained within the pipe and immediately discharged onto the fire
Where is Dry pipe used
Where temperature my freeze the water( unheated garages, cold storage)
What’s the ratio of pressure in a Dry pipe
6:1
How long for for a dry pipe to initiate
60 sec
3 parts of a fire triangle
Oxygen, fuel and heat
4 parts of a fire tetrahedron
Heat, fuel, oxygen and chain reaction
Which ones more expensive class B or A
Class A
Who performs the verification?
By qualified independent party
What’s a two stage system
When activated, causes panel to sound an alert and, after 5 minutes turn into alarm mode
Signal cct with ground fault shows what on the panel?
Trouble
Residential smks, if one goes off, what happens
They all go off
Can you use pig tails for heat detectors
No
O/C device must be identified with?
Red and locked in the ON position
How should Electrical supervisory device be wired?
In a way that’s is not possible to remove from the cct without causing a trouble
When should verification be preformed ?
Once all fire alarm equipment has been installed and no ground faults
The amount of signals devices used is dependent on?
The current draw of each particular device
Audible device rule
Each audible device most provide suitable terminals or integral leads for connection into the signal cct
Inverse square law
Distance from the sound source increases, the sound intensity is inversely proportional to square device
What are the 2 typical types of audible signal
Alert and alarm
Single stage system
When activated it causes the panel to sound the alarm
What are fire alarm system comprised of
Inputs( imitation, supervisory cct), a controller ( system brain), outputs( signaling, ancillary, auxiliary)
Local system is ?
Primarily to warn the occupants in the building
Auxiliary systems
have features of a local system with added features of automatically contacting the local fire department
Proprietary systems
This system is a central station that is located on the premises and constantly monitored by trained operators
Transmits troubles and alerts signals to the central supervising station
Central stations
Alarm signals transmitted outside the protected premises to a monitoring company of fire department
Central stations
Alarm signals transmitted outside the protected premises to a monitoring company of fire department
When is a fire alarm system required
Fire alarm system must be constant, continuous operation, it is constantly monitored for faults
Power supplied to the fire alarm cct shall be
Provided from a separate cct
Heat Detectors cannot
Be connected using pigtails or Wire Connectors
In a Commercial Building a Fire Alarm System must abide by
The CEC, the OBC
In a Supervisory Circuit, a fault is caused when
A Supervised device such as a normally open water valve, is moved from its typical state
An EOL must be installed:
Less than 1800mm AFF to the center of the device
A Zone can be defined as:
An area reserved by Fire Detectors, and, A designated area of a Building
Backup Power must last?
at least 24 hours
