Chap 9 Built In fire Protection

Question 1

Four main types of Sprinkler Systems

Answer 1

1. Wet Pipe
2. Dry Piper
3. Deluge
4. Preaction

Question 2

According to the National Fire Protection Association, what percent of fires in sprinkled buildings are either extinguished or contained?

Answer 2

96%

Question 3

All Sprinkler systems have along with other test and drain valves. This controls the flow of water from domestic water supply systems and/or on site fire pumps.

Answer 3

Main water control valve

Question 4

Three common types of water main control?

Answer 4

1. Outside screw and yoke (OS&Y)
2. Post indicator valve (PIV)
3. Wall Post indicator valve (WPIV)

Question 5

Most common main water control. Valve is threaded stem that controls its opening and closing.

Answer 5

Outside screw and yoke (OS&Y)

Question 6

Type of main water control valve characterized by the visible window, which indicates the position of the valve.

Answer 6

Post indicator valve.

Question 7

Water main control valve mounted on a wall characterized by the visible window, which indicates the position of valve.

Answer 7

Wall post indicator valve (WPIV)

Question 8

These valves ensures water can only flow in one direction. Think ground monitor.

Answer 8

Check/Clapper Valves

Question 9

What are stopcock valves used for in Fire protection.

Answer 9

System drainage and alarm silencing.

Question 10

The drain that drains the entire system.

Answer 10

Main Drain

Question 11

Mechanical or electrical device attached to a sprinkler system to alert for water flow.

In hydraulic alarm, what is used to notify water flow.

Answer 11

Water Flow Alarm

Water Gong

Question 12

Every sprinkler system must have this.

Answer 12

Good water supply that is reliable, automatic, adequate volume and pressure.

Question 13

Stationary pump designed to increase water flow or pressure in a sprinkler or standpipe system.

Answer 13

Fire Pump

Question 14

Required minimal residual water pressure to the highest farthest sprinkler head.

Answer 14

15psi

Question 15

What is a test header. What does it indicate?

Answer 15

Indication of a fire pump.

Multiple 2 ½ inch outlets that are used for testing fire pump.

Question 16

What determines the number of outlets on a test header?

Answer 16

required flow for the occupancy.

Question 17

In addition to the on site water source these will be provided for fire department use.

Answer 17

Fire department connections (FDCs)

Question 18

Vertical piping in standpipe or sprinkler systems.

Answer 18

Riser

Question 19

Fire Protection System constantly has water throughout the system.

Answer 19

Wet Pipe System

Question 20

Fire Protection System has no water in piping beyond check valve. Replaces water with air that is under pressure to keep water from entering system. Typically where piping could potentially freeze.

Answer 20

Dry Pipe Sprinkler System

Question 21

These are found in many dry pipe systems to speed the process of getting water to the fire area.

Answer 21

Accelerators

Exhausters (Bleeds off pressure)

Question 22

Fire Protection System similar to dry pipe systems but fills with water with separate alarm. The sprinkler heads still need to be heated to activate in order for water to flow. Found in areas where water damage must be prevented.

Answer 22

Preaction system

Question 23

Fire protection system in which the pipe is dry and all heads are open. Used in locations where occupancy is extra hazardous.

Answer 23

Deluge Sprinkler System

Question 24

This NFPA standard for installation of sprinkler systems in one- and two-family dwellings and manufactured homes.

Answer 24

NFPA 13D

Question 25

This class of standpipes must have:

• a water supply adequate to flow 500 gpm for at least 30
• Supply must provide a minimum residual pressure of 65 psi at highest/farthest outlet while flowing 500gpm
• Each additional standpipe in system must flow 250 gpm for at least 30 mins

Answer 25

Class 1 Standpipes

Question 26

This standpipe system is for building occupants so they may try to control the fire while still in incipient stage. Must have:

• Water flow of 100 gpm for at least 30 mins
• Min residual pressure of 65psi at highest/farthest outlet flowing 100 gpm

Answer 26

Class II Standpipes

Question 27

This class of standpipes is designed for the use of fire departments and for use of by building occupants.

Answer 27

Class III

Question 28

Potential problems dealing with Class III Standpipe systems.

Answer 28

Pressure reducing devices.

Question 29

According to NFPA , standpipe systems must be limited to a maximum height of?

Max height of 2 stand pipe systems

Answer 29

NFPA 14

275 ft

Higher than 275 ft additional zones must be installed.

2 max height is 550

Question 30

Color Coding of FDCs

1. Standpipe
2. Automatic sprinkler system
3. Non automatic sprinkler system
4. Combination sprinkler and standpipe system

Answer 30

1. Red
2. Green
3. Silver
4. Yellow

Question 31

These two types of extinguishing systems are found in locations such as computer rooms and other intricate electrical equipment.

Answer 31

Carbon Dioxide and Halogenated

Question 32

Extinguishing agent contains carbon and one more more elements (Bromine, chlorine, fluorine, and iodine.)

Interferes with he chemical chain reaction.

Answer 32

Halon

Question 33

These Newer extinguishing agent are considered nontoxic, nonconductive and ecologically safe and effective for Class A,B, and C fire.

Answer 33

Clean agent, FE-36 or Centrimax ABC 40

Question 34

Excellence reference as to what SOGs should contain when dealing with standpipe and sprinklers.

Answer 34

NFPA 13E