Sprinkler Systems Questions and
Answers Rated A+
Describe a Frangible glass bulb - ANSWER-Sealed glass bulb is filled with alcohol-
based or other mixture of liquids
Liquid expands as it is heated
Eventually bulb bursts, opening
the head
Describe a Fusible link - ANSWER-Solder-type metal holds release mechanism
Metal melts at specified temperature, opening the head
Describe the Response Time Index or RTI - ANSWER-The main parameter that
describes the response characteristics of a heat detector
The units of RTI are m1/2.s1/2
The smaller the RTI, the quicker the response of the
heat detector
Typical values are
Fast response : 50 m1⁄2 s1⁄2 (3 mm diameter bulb)
Intermediate response: 80 m1⁄2 s1⁄2
Standard response : 135 m1⁄2 s1⁄2 (5 mm diameter bulb) to 250 m1⁄2 s1⁄2 (8 mm
diameter bulb) although a value of 100 m1⁄2 s1⁄2 is now common for the 5 mm bulb
How can a sprinkler system be used to control a fire - ANSWER-Limits growth of
burning combustible
Prevents further fire spread by wetting neighbouring
combustibles
Final extinguishment might be conducted by Fire Service
List the different occupancy hazard classifications - ANSWER-Extra Light Hazard (ELH)
- non-industrial occupancies where amount and combustibility of contents is low
Ordinary Hazard (OH1, OH2, OH3, OH3S) - industrial occupancies dealing with mainly
'ordinary' combustible materials
Extra High Hazard (EHH) - industrial occupancies dealing with highly flammable
materials or materials in high piled storage
List the types of sprinkler heads available - ANSWER-Recessed and concealed heads
used to make them less obtrusive
Residential heads designed for home applications
Large drop sprinklers for high piled stock type applications
Extended coverage sprinklers intended to cover larger areas than normal sprinklers
On-off sprinklers designed to open and close at set temperatures
Side-wall sprinklers designed to be installed along walls
Answers Rated A+
Describe a Frangible glass bulb - ANSWER-Sealed glass bulb is filled with alcohol-
based or other mixture of liquids
Liquid expands as it is heated
Eventually bulb bursts, opening
the head
Describe a Fusible link - ANSWER-Solder-type metal holds release mechanism
Metal melts at specified temperature, opening the head
Describe the Response Time Index or RTI - ANSWER-The main parameter that
describes the response characteristics of a heat detector
The units of RTI are m1/2.s1/2
The smaller the RTI, the quicker the response of the
heat detector
Typical values are
Fast response : 50 m1⁄2 s1⁄2 (3 mm diameter bulb)
Intermediate response: 80 m1⁄2 s1⁄2
Standard response : 135 m1⁄2 s1⁄2 (5 mm diameter bulb) to 250 m1⁄2 s1⁄2 (8 mm
diameter bulb) although a value of 100 m1⁄2 s1⁄2 is now common for the 5 mm bulb
How can a sprinkler system be used to control a fire - ANSWER-Limits growth of
burning combustible
Prevents further fire spread by wetting neighbouring
combustibles
Final extinguishment might be conducted by Fire Service
List the different occupancy hazard classifications - ANSWER-Extra Light Hazard (ELH)
- non-industrial occupancies where amount and combustibility of contents is low
Ordinary Hazard (OH1, OH2, OH3, OH3S) - industrial occupancies dealing with mainly
'ordinary' combustible materials
Extra High Hazard (EHH) - industrial occupancies dealing with highly flammable
materials or materials in high piled storage
List the types of sprinkler heads available - ANSWER-Recessed and concealed heads
used to make them less obtrusive
Residential heads designed for home applications
Large drop sprinklers for high piled stock type applications
Extended coverage sprinklers intended to cover larger areas than normal sprinklers
On-off sprinklers designed to open and close at set temperatures
Side-wall sprinklers designed to be installed along walls
