(2) TB 149- Residential Sprinkler Systems

Question 1

Sprinkler systems are required on new constructed homes. They will also be required on all unattached structures greater than ____sq ft

Answer 1

200

Question 2

During the start of a fire, a home fire can reach deadly proportions in as little as ____ minutes, with seven to ten minutes passing before first responders arrive.

Answer 2

3

Question 3

RESIDENTIAL sprinklers have HEAD temperatures in the range from ___ to ___ degrees

Answer 3

135 to 175°

Question 4

A residential sprinkler head will cover a minimum area of ___ by ___ft.

Extended coverage heads can cover how big an area?

Answer 4

1. 12x12’
2. 20x20’

Question 5

Most new sprinkler systems use _______ pipe which is what color?

Answer 5

Chlorinated polyvinylchloride (CPVC)

Orange

Question 6

Sprinkler systems in new constructed homes:
Sprinkler Shut-off/control valves are blue in-line ball valves and are usually located in what two places?

Answer 6

Garage and side of house

(Identification signs are required by LADBS but the minimum SIZE of sign and LETTERING is NOT REGULATED. BELL alarms are OPTIONAL)

Question 7

Sprinkler systems in new constructed homes:

LADBS requires a (minimum) water demand capable of flowing _____ sprinkler heads for a period of ___ minutes

Answer 7

2 heads for 10 min

Question 8

Residential sprinklers ARE NOT subject to Chief’s Regulation No.4 testing and would only be inspected when _________.

After the installation of a residential sprinkler system receives its final approval, the maintenance and operability becomes the responsibility of ________.

Answer 8

construction is complete.

The Homeowner

Question 9

Sprinkler systems in new constructed homes:

If difficulty locating the shut-off valve occurs, shut the water off at the ____

Answer 9

Street

Question 10

Sprinkler systems are required on new constructed homes. Sprinklers will be installed in patio areas if they extend ___ ft out from the house.

Answer 10

4 ft

Question 11

As of January 1, 2011, The State of California is requiring the installation of residential fire sprinklers in all NEW _________.

New requirement does not apply to structures built prior to Jan 2011.

Answer 11

one and two family DWELLINGS and MANUFACTURED HOMES.

(This mandate uses the NFPA 13D standard that includes new construction of garages, patios extending 4’ from house and unattached structures greater than 200 sq. ft)

Question 12

The new residential sprinkler systems are only required in what areas of the home?

Answer 12

-Livable areas

(Attics or other combustible sealed spaces are exempt.)

Question 13

Nationwide statistics show that most fires, injuries and deaths occur at home.

The International Association of Fire Chiefs (IAFC) report that approximately 3,000 civilians perish annually from fire, with nearly ______ of those deaths occurring at home

Answer 13

2/3rds

Question 14

Residential fire sprinkler systems are primarily “LIFE SAFETY” systems with the purpose of?

Answer 14

-preventing FLASHOVER and improving chances of OCCUPANT ESCAPE.

(OBJECTIVE is containing fire to room of origin)

Question 15

Residential sprinkler heads are more _______ than traditional heads and therefore activate at earlier stages of the fire.

Answer 15

-heat sensitive

(Thinner fusible links or smaller diameter bulbs are used)

Question 16

Who plan checks and approves the installation of residential sprinklers?

Answer 16

The Plumbing/Mechanical Engineering Division of the Los Angeles Department of Building and Safety (LADBS)

(All components of the home systems are to UL or FM listed)

Question 17

Water supply for the sprinkler system can be obtained from a variety of sources.

They include:

Answer 17

-DOMESTIC water supply
-elevated TANK
-pressure TANK
-stored source or WELL with an adequate pump

Question 18

True or False?

Piping beyond the street shut-off valve shall be installed in such a manner that the supply to the sprinklers SHALL NOT be turned off when the domestic system is being serviced (domestic water can be isolated).

Answer 18

True

Question 19

There are a variety of piping materials that can be used for residential systems. These include black pipe, copper pipe, CHLORINATED POLYVINYLCHLORIDE (CPVC), polybutylene (PB), schedule 40 steel or thin walled steel.

Most all of the new systems in the City use CHLORINATED POLYVINYLCHLORIDE due to:

Answer 19

-cost
-fabrication time
-fire resistiveness
-connectability to domestic water
-less friction loss.

Question 20

Home sprinkler PIPING is installed in the attic and has the ceiling acting as a barrier between the room of origin and piping LAYOUT.

A greater vulnerability to heat is that of the piping _____ and _____.

Answer 20

-hangers and straps

(If these components are exposed, they may loosen/expand and cause the pipe to sag or drop, reducing the effectiveness of the system.)

Question 21

For homes with residential sprinkler systems, the objective AFTER extinguishment of the fire would be ___________.

Answer 21

minimizing water damage and salvage