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Low Voltage Year 2 Test 8 > Fire Alarm CH 4 > Flashcards

Fire Alarm CH 4 Flashcards

1
Q

a 20 by 20 foot room with a 30 foot high ceiling requires a minimum _______ ceiling mounted strobe

A

55 CD

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2
Q

Mechanical covers or protection for notification appliances may_______

A
  • Reduce the effectiveness of the appliance
  • require de-rating of the appliance
  • require reduced spacing of the appliances
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3
Q

combination audible/visible notification appliances must be mounted so the entire lens is between _________ above finished floor

A

80-96 inches

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4
Q

what are the battery requirements for a fire alarm system battery backup?

A

24 hours standby plus 5 min of alarm with a 20 percent safety factor.

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5
Q

according to NFPA 72, the lenses of visible notification appliances for non sleeping areas must be mounted _______ above finished floor

A

80-96 inches

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6
Q

visible notification appliances are required when the ambient sound pressure is greater than?

A

105 dB

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7
Q

Can a visible notification appliance (strobe) that is listed for wall mounting be used on a ceiling? explain.

A

no the appliance must be listed for use

will not adequately distribute light

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8
Q

Class C circuitry

A

WAN / LAN

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9
Q

audible signals in sleeping areas must be

A

whichever is greater

  • 15 dB above average SPL
  • 5 dB above max spl sustained 60 seconds or longer
  • 75 dB
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10
Q

sound pressure level is always measured using the ______ scale

A

A-weighted

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11
Q

visible notification appliances used for public mode signaling (for the hearing impaired) must be listed to UL _____>

A

1971

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12
Q

heat detector distance from ceiling?

A

4-12 inches

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13
Q

private mode signaling is permitted in _____

A

elevator cars and rest rooms

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14
Q

Class A circuitry

A

a pair of both feed and return wires back to panel.

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15
Q

private mode signaling is permitted in _____

A

elevator cars

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16
Q

the minimum required sound pressure level for private mode signaling is ____ above the average ambient or 5 dB above the maximum sound pressure level lasting a minute or more, using the A-weighted scale

A

10dB

17
Q

can Both audible and visible appliances be wired on the same circuit?

A

yes

18
Q

Corridor visible notification appliances must be installed a maximum of ________ from each end of the corridor.

A

15 feet

19
Q

sleeping area visible appliances mounted 21 inches from a ceiling must have a minimum rating of _______

A

177 cd

20
Q

the minimum required sound pressure level for private mode signaling is 10 dB above the average ambient or _______ above the maximum sound pressure level lasting a minute or more, using the A-weighted scale

A

5 dB

21
Q

The minimum required sound pressure level for public mode signaling is the greater than _______ above the average ambient or 5 dB above the maximum sound pressure level lasting a minute or more using the A weighted scale

A

15 dB

22
Q

a sleeping room with an ambient sound pressure level of 45 decibels A-weighted must have _______ at the pilliow

A

60 dBA or 75 dBA whichever is greater

so 75 dBA

23
Q

smoke detectors should be spaced _________ times the listed spacing

A

.7

24
Q

according to NFPA 72, a 20 by 20 foot room or an area with a ten foot ceiling is best covered by a _____ visible notification appliance, centered on one wall.

A

15cd

25
Q

Notification appliances used outdoors may result in ______ unless listed for such use

A

ground faults

26
Q

installation instruction for the notification appliances are found on _________.

A

The product cut sheet

27
Q

name an audible textual appliance

A

speaker

28
Q

audible notification appliances must be mounted ________ above the finished floor and not less than 6 inches from the ceiling

A

90 inches

29
Q

Class C circuitry

A

WAN / LAN

30
Q

audible notification appliances must be mounted 90 inches above the finished floor and not less than ______ from the ceiling

A

6 inches

31
Q

in an elevator lobby, how many feet does a device have tobe from the center-line of the elevator door?

A

21 feet

32
Q

strobes must be synchronized when there are _________.

A

2 or more appliances in a room

33
Q

the type of audible appliance used on EVAC systems is a _______

A

speaker

34
Q

Class B circuitry

A

one pair of wires daisy chained with an EOL resistor

35
Q

what are 3 examples of a textual visible displays

A
  • LCD panel
  • CRT monitor
  • Printer
36
Q

visible appliances in sleeping areas must be within ____ of the pillow

A

16 feet

37
Q

The minimum required sound pressure level for public mode signaling is the greater than 15 dB above the average ambient or _____ above the maximum sound pressure level lasting a minute or more using the A weighted scale

A

5 dB

Low Voltage Year 2 Test 8 (4 decks)

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