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Flashcards in FA3 Deck (29):
1

Water level switches are a(n) ___ initiating device.
a. alarm b. guard's tour
b. supervisory d. trouble

b. supervisory

2

Which of the following devices is used to directly detect flames?
a. Heat detector
b. Radiant energy-sensing fire detector
c. Smoke detector
d. Supervisor

b. Radiant energy-sensing fire detector

3

Supervisory signal-initiating devices indicate a(n) _____
a. alarm
b. fault in the wiring or power supply
c. off-normal suppression system
d. none of the above

c. off-normal suppression system

4

Which of the following is a supervisory signal-initiating device?
a. manual fire alarm box
b. room temperature switch
c. spark/ember detector
d. vane-type flow switch

b. room temperature switch

5

Vane- (paddle) type switches are a(n) ____ initiating device.
a. alarm b. supervisory
c. supervisory or alarm d. trouble

a. alarm

6

Ionization-type smoke detectors use ____ as a means of detecting smoke particles.
a. Americium-241 b. Infrared LED
c. Laser d. None of the above

a. Americium-241

7

Smoke detectors that detect smoke by reflecting light from smoke particles onto a sensor are called ____ smoke detectors.
a. ionization b. light-obscuration
c. light-scattering d. particle-counting

c. light-scattering

8

The most appropriate type of detection for a smoldering fire is a(n) _____.
a. ionization-type detector
b. photoelectric-type smoke detector
c. radiant energy-sensing fire detector
d. rate-of-rise heat detector

b. photoelectric-type smoke detector

9

Ionization type smoke detectors are best suited to detect smoke particles having a size ___ in diameter.
a. between 1 and 2 microns
b. between 2 and 3 microns
c. greater than three microns
d. less than on micron

d. less than on micron

10

A smoke detector that has a laser particle counter is best suited for ____.
a. attics b. clean rooms
c. garages d. kitchens

b. clean rooms

11

Which type of smoke detector works best in large open areas?
a. ionization-type b. projected beam-type
c. spot-type d. all of the above

b. projected beam-type

12

Rate-of-rise heat detectors usually operate when the temperature ruse is ____ per minute.
a. 10-20° b. 10-15°
c. 12-15° d. 15-20°

c. 12-15°

13

The time difference between the ceiling temperature and the sensing element reaching the same temperature is called ____.
a. response time index
b. thermal lag
c. thermal response characteristic
d. time delay response

b. thermal lag

14

Total coverage is _____.
a. defined and required by building codes
b. defined and required by NFPA 72
c. defined by building codes but required by NFPA 72
d. defined by NFPA 72 but required by building codes

d. defined by NFPA 72 but required by building codes

15

Total coverage includes inaccessible combustible areas. True or False

True

16

Wall mounted spot-type heat detectors are installed so that the ]top of the detector is ___ from the ceiling.
a. 4-12" b. 6-14"
c. 8-16" d. 18"

a. 4-12"

17

Ceiling-mounted spot-type heat detectors are installed so that the edge of the detector is at least ___ from the wall.
a. 2" b. 4"
c. 6" d. 8"

b. 4"

18

Heat detectors should be selected to operate at least ___ above the maximum expected ambient temperature in the protected space.
a. 5°F b. 10°F
c. 15°F d. 20°F

d. 20°F

19

It is permitted to install smoke detectors in an ambient temperature of 115°F. True or False

False

20

Waterflow switches are permitted to have a time delay, or retard, up to ___
a. 30 seconds b. 60 seconds
c. 90 seconds d. 100 seconds

c. 90 seconds

21

NFPA 72 permits ___ to be used as a guide for smoke detector spacing on smooth and level ceilings.
a. 15' b. 20'
c. 25' d. 30'

d. 30'

22

For level, non-smooth ceilings, Section 17.7.3.2.4.2(10 of NFPA 72 permits the smooth ceiling spacing of spot-type smoke detectors for beams or joists with depths up to ___ of the ceiling height.
a. 5% b. 10%
c. 15% d. 20%

b. 10%

23

Heat detectors located on a smooth ceiling that is 19' in height must be reduced by ___ of their listed spacing.
a. 52% b. 58%
c. 64% d. 71%

c. 64%

24

On a sloping ceiling, beams run up the slope and are 14" deep. The average ceiling height is 15'. According to NFPA 72, the smoke detector spacing should be ___.
a. a detector in every pocket.
b. reduced by 1/2 parallel to the beams
c. reduced by 1/2 perpendicular to the beams
d. smooth ceiling spacing

d. smooth ceiling spacing

25

Valve supervisory initiating devices must initiate a supervisory signal within ____ revolution(s) of the hand wheel, or ___ of the travel distance of the valve.
a. 1 / 1/5 b. 2 / 2/5
c. 2 / 1/5 d. 3 / 1/5

c. 2 / 1/5

26

Pressure supervisory switches must indicate ____ from nominal pressure.
a. 5 psi b. 10 psi
c. 15 psi d. 20 psi

b. 10 psi

27

Vane (paddle) -type waterflow switches cannot be used on what type of system?

Dry-pipe

28

The spacing of heat detectors on ceilings with joists is general reduced by ____.
a. 1/2 in the direction parallel to the joists
b. 1/2 in the direction perpendicular to the joists
c. 1/3 in the direction parallel to the joists
d. 1/3 in the direction perpendicular to the joists

b. 1/2 in the direction perpendicular to the joists

29

A smoke detector is required in each beam pocket where the beam depths are greater than ___ of ceiling height and the width between beams is equal to or greater than ___ of the ceiling height.
a. 40% / 40% b. 40% / 10%
c. 10% / 10% d. 10% / 40%

d. 10% / 40%