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Low Voltage Year 2 Final > Review > Flashcards

Review Flashcards

1
Q

Class C FA circuit

A

communications between panels

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2
Q

what is the minimum candela for visual notification devices in a corridor

A

15 candela A

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3
Q

what are 3 circuits you are not allowed to combine with power limited fire alarm

A

light power
class one
non power limited fire alarm

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4
Q

why does a fire alarm IDC monitor for grounds and opens but not short circuits

A

goes into alarm when there is a short

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5
Q

where is a resistor placed for an open loop door contact

A

parallel

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6
Q

elevator shunt trip

A

stop ELV from running before sprinklers start running.

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7
Q

what type of access control card has memory

A

smart card

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8
Q

what type of system uses a prerecorded or live message.

A

evac - emergency voice/alarm communication

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9
Q

what type of glass is used for high security application

A

wired

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10
Q

what type of glass is between two thin pieces of plastic film

A

laminated

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11
Q

what type of access control credential is most difficult to duplicate

A

bio-metric

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12
Q

where is a resistor placed for a closed loop door contact

A

series

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13
Q

Class D FA circuit

A

Fail safe

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14
Q

NFPA 99

A

Health care facilities code

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15
Q

How does a ionization type smoke detector work

A

radioactive material americium 241

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16
Q

Public mode signaling decibel requirements

A

15 dbA above average sound pressure level or 5 dbA above max sound sustained for one minute

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17
Q

how does a photoelectric smoke detector work

A

light obscuration or light scattering

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18
Q

control relays and modules must be installed within _____ from the equipment they are controlling

A

3 feet

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19
Q

what device is used for two way communication to the FCC

A

fire fighters telephone

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20
Q

what type of glass breaks into large jagged pieces

A

plate

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21
Q

what is specific area protection

A

protects one specific location

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22
Q

where must a smoke detector be placed in an elevator lobby

A

within 21 feet of the center line of its controls

23
Q

what term is used to describe when a bio metric reader accepts an invalid bio metric input

A

illegitimate use or false acceptance

24
Q

name and describe the 3 most common types of alarm system

A

local - in home
supervisory - high rise with security personnel 24/7
central

25
Q

what uses reversed polarity in an alarm state to operate appliances

A

NAC - Notification appliance circuit

26
Q

what is Point of entry protection

A

emphasis placed on specific point which might allow entry or exit from a secure area

27
Q

what type of glass break detector should be used on plexiglas

A

shock sensor

28
Q

where can a smoke or heat detector be placed on a wall.

A

4-12 inches from the ceiling

29
Q

what height must visual notification devices be mounted in a corridor

A

80-96 inches

30
Q

A break beam sensor is considered ________ detection.

A

active

31
Q

what state is most common for magnetic contacts

A

normally closed

32
Q

what type of glass shatters into thousands of tiny pieces

A

tempered

33
Q

where should a roller plunger contact be installed and why

A

hinge side of door

more secure, less likely to be damaged, and less likely to cause false alarms

34
Q

in a new construction home, what 3 areas require a smoke detector

A

bedrooms
each floor
outside bedroom

35
Q

what type of glass is made of plastic and snaps easily

A

Plexiglas

36
Q

NFPA 70

A

National electric code

37
Q

Class A FA circuit

A

Conductors return to panel

38
Q

NFPA 72

A

National fire alarm and signaling code

39
Q

NFPA 101

A

life safety code

40
Q

Class B FA circuit

A

daisy chained with an EOL

41
Q

what type of term is used to describe a magnetic contact normal state

A

normally open or normally closed

42
Q

Class X FA circuit

A

Class A with the addition of an isolation module between each device

43
Q

what are the two most commonly used credential types

A

proximity or mag strip

44
Q

what makes an access control system so beneficial and effective

A

ability to easily remove/add users and keys w/o re-keying a whole building

45
Q

what are the 3 most common types of fire alarm circuits

A

IDC - uses EOL

NAC - uses reverse polarity, a blocking diode and an EOL

SLC - addressable, can t tap, polls devices

46
Q

How Many sets of contacts are on a DPDT relay

A

2 sets of contacts

NO1 COM1 NC1, and NO2 COM2 NC2

47
Q

what is the difference between a control module and a relay module used in fire alarm systems

A

unlike relays control modules are supervised with an EOL resistor

48
Q

what is spot protection

A

protects one specific object

49
Q

what NFPA volume is and section covers fire alarm wiring

A

NFPA 70 Sec 760

50
Q

Private mode signaling disciple requirements

A

15 dbA above average sound pressure level or 5 dbA above max sound sustained for one minute

51
Q

what is perimeter protection

A

provides protection of the perimeter area of a building

52
Q

a fire alarm system dialer has what requirements for the communication pathways connected to that dialer

A

uses RJ31X Jack. 2 pathways one must be a dedicated line

53
Q

when a security system seizes a phone line what happens

A

the shortening bar engages on the RJ31X jack

54
Q

What two signals can are duct detectors permitted to generate?

A

supervisory or alarm

Low Voltage Year 2 Final (1 decks)

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