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Automation > Fire Alarm Systems > Flashcards

Fire Alarm Systems Flashcards

1
Q

In an addressable system initiating devices are connected to the FACP through a line referred to as?

A

DCL (Data communication Link) or
SLC (Signalling Line Circuit)

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2
Q

In an addressable system, Modules are connected to the FACP through a line referred to as a

A

DCL OR SLC

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3
Q

In a conventional fire alarm circuit, the name of the small current that flows to indicate circuit integrity under normal conditions is called?

A

Supervisory current

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4
Q

The two types of fire alarm control units are?

A

Single stage and two stage

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5
Q

Relay modules are used for the control of?

A

Ancillary devices/ circuits

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6
Q

Examples of Ancillary devices are?

A

Magnetic door holders
Fan contractors
Fire pumps

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7
Q

What is the primary purpose of a Fire alarm circuit

A

To save lives!

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8
Q

Isolation modules are used to ?

A

Isolate a portion of the SLC (signalling line circuit)

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9
Q

4 conditions of a fire alarm system are?

A

Normal
Trouble
Supervisory
Alarm

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10
Q

Monitor modules are used to monitor?

A

Conventional devices/circuits

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11
Q

In a conventional fire alarm system, what is used to provide circuit supervision?

A

End of Line Resistor (EOL)

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12
Q

Conventional initiating circuits end with?

A

End of line resistors (EOL)

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13
Q

Conventional monitoring circuits end with?

A

End of Line Resistors (EOL)

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14
Q

A conventional fire alarm system does not provide identification of the specific device that initiated the alarm. What does it identify?

A

It will provide identification of the Zone (area) the initiating device is located

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15
Q

2 types of heat detectors are?

A

Fixed and Rate of rise

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16
Q

Conventional NAC circuits end with?

A

End of Line Resistors (EOL)

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17
Q

In addressable circuits what is polarity conscious?

A

All initiating and monitoring devices

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18
Q

A SLC (signalling line circuit) or a DCL (Data communication link doesn’t end with a ?

A

End Of Line Resistor

19
Q

Addressable NAC circuits end with a?

A

End of line resistor

20
Q

When a heat detector pull station or a smoke detector is activated in a single stage fire alarm system what will initiate?

A

Audible evacuation signal

21
Q

On a two stage fire alarm system if 5 minutes pass and the signal has not been acknowledged what happens?

A

An alarm signal will activate

22
Q

When a heat detector pull station or smoke detector is activated a two stage fire alarm system will initiate a?

A

Audible alert signal

23
Q

When wiring a SLC or DCL what terminal do you leave on!

A

The B terminals

24
Q

List 3 sprinkler tree devices and the conditions each device will initiate through the FACP?

A

Gate valve- supervisory
Low water pressure switch- supervisory
Water flow switch- ALARM

25
Q

In an addressable system if a device address is wrong, what condition will be displayed?

A

Trouble

26
Q

In a conventional fire alarm circuit what is polarity sensitive?

A

Smoke detectors and Notification devices

27
Q

What can be used to de energize an ancillary device?

A

Addressable relay module

28
Q

What can be used to interconnect a conventional device/ circuit to an addressable fire alarm system?

A

Addressable monitoring module

29
Q

What style is a Class A system?

A

Style 6

30
Q

What style is a class B system?

A

Style 4

31
Q

What are the 5 classes of Fires?

A

Class A = ordinary combustibles
Class B= Flammable liquids
Class C= Electrical
Class D= Combustible metals
Class K= cooking fires

32
Q

The 3 major types of fire alarm systems are?

A

Conventional
Multiplex
Addressable

33
Q

What are some notification appliances?

A

Strobes, bells horns and speakers

34
Q

What are some visual appliances?

A

Strobes would be the only visual

35
Q

What are some initiating devices?

A

Smokes, pull stations, heat detectors

36
Q

3 half tones a pause and then repeats is?

A

Temporal 3

37
Q

Pressure switch has what kind of contacts?

A

N/C contacts. Uses pressure to open it

38
Q

Flow switch uses what kind of contact!

A

N/O contact! When water flows it closes causing an alarm

39
Q

What contact does the gate valve use?

A

N/C held open contact, when closed it sends a supervisory alarm to the FACP

40
Q

What are NAC circuits?

A

Notification Appliance circuits
(Audible or Visual)

41
Q

What are the color codes of resistors?

A

BBROYGBVGW GS and nothing
Black 0
Brown 1
Red 2
Orange 3
Yellow 4
Green 5
Blue 6
Violet 7
Grey 8
White 9

Gold +/- 5%
Silver +/- 10%
No color = +/- 20%

42
Q

What are two types of basic smoke detectors?

A

Photoelectric and ionization

43
Q

Automatic devices are?

A

Heat and smoke detectors and The flow switch on the sprinkler tree

44
Q

What are manual devices?

A

Pull stations either single or two stage

Automation (3 decks)

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