Fire Alarm CH 4

Question 1

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

Answer 1

55 CD

Question 2

Mechanical covers or protection for notification appliances may_______

Answer 2

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

Question 3

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

Answer 3

80-96 inches

Question 4

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

Answer 4

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

Question 5

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

Answer 5

80-96 inches

Question 6

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

Answer 6

105 dB

Question 7

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

Answer 7

no the appliance must be listed for use

will not adequately distribute light

Question 8

Class C circuitry

Answer 8

WAN / LAN

Question 9

audible signals in sleeping areas must be

Answer 9

whichever is greater

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

Question 10

sound pressure level is always measured using the ______ scale

Answer 10

A-weighted

Question 11

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

Answer 11

1971

Question 12

heat detector distance from ceiling?

Answer 12

4-12 inches

Question 13

private mode signaling is permitted in _____

Answer 13

elevator cars and rest rooms

Question 14

Class A circuitry

Answer 14

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

Question 15

private mode signaling is permitted in _____

Answer 15

elevator cars

Question 16

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

Answer 16

10dB

Question 17

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

Answer 17

yes

Question 18

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

Answer 18

15 feet

Question 19

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

Answer 19

177 cd

Question 20

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

Answer 20

5 dB

Question 21

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

Answer 21

15 dB

Question 22

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

Answer 22

60 dBA or 75 dBA whichever is greater

so 75 dBA

Question 23

smoke detectors should be spaced _________ times the listed spacing

Answer 23

.7

Question 24

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.

Answer 24

15cd

Question 25

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

Answer 25

ground faults

Question 26

installation instruction for the notification appliances are found on _________.

Answer 26

The product cut sheet

Question 27

name an audible textual appliance

Answer 27

speaker

Question 28

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

Answer 28

90 inches

Question 29

Class C circuitry

Answer 29

WAN / LAN

Question 30

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

Answer 30

6 inches

Question 31

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

Answer 31

21 feet

Question 32

strobes must be synchronized when there are _________.

Answer 32

2 or more appliances in a room

Question 33

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

Answer 33

speaker

Question 34

Class B circuitry

Answer 34

one pair of wires daisy chained with an EOL resistor

Question 35

what are 3 examples of a textual visible displays

Answer 35

- LCD panel - CRT monitor - Printer

Question 36

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

Answer 36

16 feet

Question 37

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

Answer 37

5 dB