Chapter 25: Sprinklers, Fire Detection Alarm Panels & Elevators

Question 1

6 Advantages of Automatic Sprinkler Systems

MRRECC

Answer 1

Most reliable fire protection device
Rarely fail to operate
Reduce insurance costs
Enhance Life Safety
Control or extinguish 96% of Fires
Create less business interruption and water damage

Question 2

4 step Function of an automated sprinkler system

DACE

Answer 2

Detect presence of fire
Alarm or transmit alarm signal
Control Growth of Fire
Extinguish fire completly

Question 3

5 Methods of Detection

VFFRS

Answer 3

Vapor detection: LEL’s
Flame or Flash: photoelectric
Fixed Temp:
Rate of Rise: operates on air pressure increase
Smoke:photo electric visible & Ionization (smallparticals

Question 4

2 types of alarm that signal water is flowing

Answer 4

Hydraulic & electric

Question 5

6 Types of Sprinkler System

WDP DRS

Answer 5

• Wet-Pipe:water in piping
• Dry-Pipe: pipe is pressurized w/air to Dry-pipe valve
• Pre-Action: detects problem and charges line; then you may be able to extinguish before the fix temp heads fuse and release above the fire
• Deluge: when one head goes all the heads on that valve go
• Residential: quick response wet or dry
• Special Extinguishing: halon, foam, dry chem, agents other than water

Question 6

Sprinkler Head

Answer 6

A fixed spray nozzle operated by a single thermal detector

Question 7

4 sprinkler head mechanisms

Answer 7

Fusible link
Chemical pellet
Frangible bulb
Quick response: life safety:fusible link w/electronic attachments

Question 8

3 ways a sprinkler may be oriented

Answer 8

Pendant
Upright
Side wall

Question 9

Stand Pipe System

Answer 9

An arrangement of piping,valves, hose connections and allied equipment installed in a building or structure.

Question 10

Purpose of a Stand Pipe System

Answer 10

To shorten length of supply and fire attack hose

Question 11

A stand Pipe

Answer 11

Is the riser portion of a stand pipe system that delivers the water supply from floor to floor.

Question 12

3 classes of Stand Pipe System

Answer 12

Class 1: 65mm connection
class 2: 38mm hose cabinet
Class 3: 65mm connection and 38mm hose

Question 13

5 types of stand pipe System

Answer 13

1 Automatic Wet: has its own H2Oand is charghed
2 Automatic Dry: filled w/ air has its own H2O supply
3 Semiauto wet:Has its own water: needsto be activated for pressure
4 Manual wet: has water but no supply: FD will pressurize and supply
5 Manual dry: filled w/ air :no pressure or supply so FD will need to do both

Question 14

Discharge pressure

Answer 14

minimum 1000kpa + 35 kpa per floor after the 5th floor to overcome head pressure

Max pressure for a stand Pipe: 2100kpa (that is what our hoses are at)
max pressure for a sprinkler system is 1050kpa
sprinkler head 150kpa

Question 15

3 Types of Fire Alarm

CmC

Answer 15

Conventional Supervised:110-120V: basic =general alarm: Multi zone=a zone to search

Multi-Plex/Fully Addressable: each devise has its own adress: silences only the activated device

Central Station: alarm goes to a supervising control center UofA, SCC

Question 16

2 Fire Alarm Stages

Answer 16

Single Stage: signal thought building when a device is activated

two stage: an alert is sent out to pre-determined area/zone, there will be a 5 min window to acknowledge the alarm before a general alarm goes off

Question 17

3 types of Elevators

Answer 17

Split Bank: only service certain floors
Blind Shaft: only accessible by certain floors
Freight:

Question 18

FIRE PHASE 1&2

Answer 18

1: Fire Recall activated manually or by an alarm or signaling device: will not return to service until 3 position key switch is re set(off:normal ,on: car will go to pre determined floor non stop with alarms going off, Reset:will clear alarms retern to service)

2:off normal operation
on (ff control) buttons for open,close call cxl stop working
hold: will hold car at floor landing w/ doors open, key can be removed and car will stay there

Question 19

Elevator test

Answer 19

Test stop @ 2nd floor open and close door
stop 2 floors below fire
only use when fire is above the 5th floor