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Fire > Initiating Devices > Flashcards

Initiating Devices Flashcards

1
Q

The form asks what type of manual fire alarm boxes are in the building. You examine a fire alarm box with a building maintenance technician. The examination shows that to operate the fire alarm box you must lift a metal flap on the box and then pull down on a lever beneath the flap. This manual fire alarm station should be classified as: 1. Single action. 2. Self actuating. 3. Double action. 4. Abort switch.

A
  1. Double action.
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2
Q

The building has a fire pump in the basement. An initiating device installed in the fire pump room transmits a signal to the building fire alarm control unit when power to the fire pump is turned off. This would be an example of which type of initiating device? 1. Alarm initiating device. 2. Supervisory initiating device. 3. Trouble initiating device 4. Manual initiating device.

A
  1. Trouble initiating device
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3
Q

The fire department questionnaire asks you to list the types of ALARM initiating devices provided in the building. Which one of the following is NOT an alarm initiating device. 1. Smoke detectors. 2. Ultraviolet flame detector. 3. Sprinkler waterflow switches. 4. Dry-pipe valve air pressure switches

A
  1. Dry-pipe valve air pressure switches
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4
Q

One fire alarm service company asked how many automatic alarm initiating devices there are in the building. You survey the building and find that there are 12 smoke detectors in various locations, 3 heat detectors, 6 manual fire alarm stations and one sprinkler waterflow switch. How many automatic alarm initiating devices are in the building? 1. 12 2. 16 3. 18 4. 22

A
  1. 16
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5
Q

The two types of sprinkler waterflow switches are: 1. Pressure switch and vane switch 2. Pressure switch and acoustic actuator 3. Vane switch and floor zone switch 4. Acoustic actuator and pressure switch

A
  1. Pressure switch and vane switch
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6
Q

Which of the following would be the most common method of initiating and alarm signal to a building fire alarm control unit upon discharge of a carbon dioxide fire suppression system? 1. Vane-type flow switch 2. Acoustic actuator 3. Manual fire alarm box 4. Pressure switch

A
  1. Pressure switch
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7
Q

Besides “pump running” and “loss of power”, what other item concerning the pump should send a supervisory signal to the building fire alarm control unit? 1. Engine oil pressure 2. Electric phase reversal 3. Engine jacket temperature 4. Battery voltage.

A
  1. Electric phase reversal
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8
Q

The wet-pipe sprinkler system needs a waterflow switch to transmit an alarm signal to the building fire alarm control unit when the sprinkler system actuates. Which type of sprinkler waterflow switch can be used on this sprinkler system? 1. Pressure switch type 2. Acoustic pressure switch 3. Vane- type waterflow switch 4. Either pressure or vane-type.

A
  1. Either pressure or vane-type.
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9
Q

__________________Initiating devices transmit a signal that indicates a fire. 1. Alarm 2. Supervising 3. Automatic 4. Manual

A
  1. Alarm
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10
Q

An initiating device that transmits a signal to a fire alarm control unit indicative of an “off normal” condition in some other fire protection or life safety system is a(an): 1. alarm initiating device 2. supervisory initiating device 3. trouble initiating device 4. monitoring device

A
  1. supervisory initiating device
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11
Q

All alarm initiating devices operate automatically EXCEPT: 1. smoke detectors 2. heat detectors 3. manual fire alarm boxes 4. valve supervisory switches

A
  1. manual fire alarm boxes
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12
Q

Which of the following is an example of a supervisory initiating device? 1. Smoke detector 2. Heat detector 3. Sprinkler valve supervisory switch 4. Sprinkler waterflow switch

A
  1. Sprinkler valve supervisory switch
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13
Q

A manual fire alarm box that actuates by simply pulling a handle would be a(an): 1. automatic fire alarm box 2. single action manual fire alarm box 3. abort switch 4. double action manual fire alarm box

A
  1. single action manual fire alarm box
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14
Q

A vane-type waterflow alarm can be used on a: 1. wet-pipe sprinkler system 2. dry-pipe sprinkler system 3. pre-action sprinkler system 4. deluge sprinkler system

A
  1. wet-pipe sprinkler system
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15
Q

Manual fire alarm boxes should be located: 1. every 100 feet throughout a building. 2. at each exit on each floor. 3. in each stairwell. 4. at the center point of the building.

A
  1. at each exit on each floor.
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16
Q

The most common method of detecting the discharge of extinguishing agent from a fire suppression system, other than a sprinkler system is a(an): 1. abort switch 2. single action switch 3. vane-type switch 4. pressure switch

A
  1. pressure switch
17
Q

A device to monitor the power availability to an electric fire pump is an example of a(an): 1. alarm initiating device 2. supervisory initiating device 3. trouble initiating device 4. monitoring device

A
  1. supervisory initiating device
18
Q

In which of the following would you most likely find a building temperature supervisory switch? 1. An air conditioned warehouse in southern Florida. 2. A heated dry-pipe valve enclosure in northern Wisconsin. 3. A non-air conditioned manufacturing building in Puerto Rico. 4. An air conditioned office building in southern California.

A
  1. A heated dry-pipe valve enclosure in northern Wisconsin.
19
Q

Most of the fire alarm boxes are red, but one is green. Why? a. The owner didn’t like red in all places, as there were some boxes that clashed with the walls. b. The green boxes are the same as the red but not connected to the fire alarm system. c. The green boxes are probably for suppression systems, and the red boxes are for the fire alarm signal initiation. d. Because red is required to indicate fire, and green is required to indicated a chlorine leak.

A

c. The green boxes are probably for suppression systems, and the red boxes are for the fire alarm signal initiation.

20
Q

NFPA 72 requires fire alarm boxes to be mounted so that they are between ___ and ___ inches above the floor. a. 42…48 b. 48…54 c. 42…54 d. 36…48

A

c. 42…54

21
Q

Fire alarm boxes have to be installed a. At every exit from every floor b. At the entrance to the building or space most often used by the occupants c. Within 10 feet of every exit from the building’s ground level. d. So that travel distance to a manual station does not exceed 300 feet.

A

a. At every exit from every floor

22
Q

Manual stations can be mounted at ___ inches above the floor. a. 30 b. 40 c. 50 d. 60

A

c. 50

23
Q

What type of detector uses the same spacing considerations as the fixed temperature heat detector? 1. Smoke detector 2. Rate of rise heat detector 3. Rate compensated heat detector 4. Beam detector

A
  1. Rate of rise heat detector
24
Q

For Infrared/Ultraviolet detectors to work, what must be available?

a) unobstructed view
b) enough day light
c) high voltage power
d) secondary power

A

a) unobstructed view

25
Q

Fixed temperature spot-type detectors are most suitable for:

a) large open areas.
b) small open areas.
c) fenced areas.
d) enclosed areas.

A

d) enclosed areas.

26
Q

A four wire smoke detector has how many distinct circuits?

a) 1
b) 2
c) 4
d) 6
e) 8

A

b) 2

27
Q

A Line type detector can perform detection which is:

a) randome and highly frequent.
b) continuous along a path.
c) random and infrequent.
d) hidden.

A

b) continuous along a path.

28
Q

Video Image Smoke Detection relies on what method for detecting the presence of smoke?

a) the automatic analysis of color pattern
b) the automatic analysis of infrared images
c) the automatic analysis of realtime video images
d) this detection method is no longer popular.

A

c) the automatic analysis of realtime video images

29
Q

What quantifies the rate of heat transfer from the ceiling jet to the detecting sensor element per unit of time?

a) RTI
b) RMI
c) RCI
d) RDI

A

a) RTI Response Time Index

NFPA 72 (2016)

A.17.6.1.4 In order to predict the response of a heat detector
using current fire modeling programs and currently published
equations describing plume dynamics, two parameters
must be known: operating temperature and response time index
(RTI). The RTI is the quantification of the rate of heat
transfer from the ceiling jet to the detector sensing element
per unit of time, expressed as a function of ceiling jet temperature,
ceiling jet velocity, and time. Spot-type heat detectors
manufactured prior to July 1, 2008, were not required to be
marked with an RTI.

30
Q

What describes the max allowable distance between hea detectors?

a) Linear space rating
b) Dimentional space rating
c) Alternative space rating
d) Ramdom space rating

A

a) Linear space rating

NFPA 72 (2016)

A.17.6.3.6 The linear space rating is the maximum allowable
distance between heat detectors. The linear space rating is also a
measure of the heat detector response time to a standard test fire
where tested at the same distance. The higher the rating, the
faster the response time. This Code recognizes only those heat
detectors with ratings of 50 ft (15.2 m) or more.

31
Q

With linear space rating, the higher the rating the faster the response time one can expect.

a) True
b) False

A

a) True

Fire (13 decks)

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