5.11: Fire Suppression (Doshi)

Question 1

Types of fire suppresion:

Answer 1

Water-based systems
Dry-pipe sprinkling systems
Halon systems
FM-200
Argonite
Carbon Dioxide (CO2)

Question 2

Wet (water) based systems (WBS) compared to Dry-pipe Sprinkling system (DPSS) in regard to water?

Answer 2

Water always remains in the water-based system;

In DPSS, an electronic fire alarm activates the water pump to send water into the system

Question 3

Wet (water) based systems (WBS) compared to Dry-pipe Sprinkling system (DPSS) in regard effectiveness and reliability?

Answer 3

WBS is more effective and more reliable

Question 4

Wet (water) based systems (WBS) compared to Dry-pipe Sprinkling system (DPSS) in regard to water leak?

Answer 4

WBS would expose the facility to water damage if pipe leaks or breaks
DPSS would not expose the facility to water damage even if pipes leaks or breaks.

Question 5

Halon Gas system:

Answer 5

• *Halon removes oxygen from air thus starves the fire
• *Halon is not safe for human
• *There should be audible alarm and brief delay before discharge to permit for the evacuation
• • Halon gas affect the ozone layer - it’s banned

Question 6

What is FM 200 Gs?

Answer 6

• *A colorless and odorless gas
• • It’s safe to be used when people are present
• • It’s environment friendly
• • It’s commonly used as gaseous fire suppression agent.

Question 7

What is Argonite gas?

Answer 7

• *It’s a mixture of 50% Argon and 50% Nitrogen
• *It’s used as gaseous fire suppression agent
• • Though environment friendly and non toxix, people have suffocated breathing argon my mistake.

Question 8

What is Carbon dioxide (CO2)?

Answer 8

• • CO2 system releases pressurized CO2 gas in the area protected to replace the oxygen required for combustion
• • unable to sustain human life
• *Illegal to be set for automatic release if any human is around.
• • Permitted where no humans are regularly present.

Question 9

Which gases are safe for human life?

Answer 9

FM-200 & Argonite gases are safe for human life. FM-200 is the safest where people are present.

However, it must be noted that Argonite, though environment friendly non-toxic, people have suffocated by breathing argon by mistake.

Question 10

Which gases are NOT safe for human life?

Answer 10

CO2 & Halon gases are not safe for human life

Question 11

Which fire suppression system can damage equipments?

Answer 11

Wet-Pipe sprinkler,

Question 12

What is the highest priority in fire suppression activities?

Answer 12

Protecting people’s life should always be of highest priority in fire suppression activities.

Question 13

An IS Auditor is reviewing fire safety arrangement in data centre. Which of the following is the MOST effective and environmentally friendly?

A. Carbon dioxide gas
B. Dry-pipe sprinklers
C. Wet-pipe sprinklers
D. Halon gas

Answer 13

B. Dry-pipe sprinklers

Carbon dioxide is accepted as an environmentally acceptable gas, but it is not safe for human life. Also, Halon has certain side effects and not safe for human life. Both Dry-pipe and Wet-pipe are effective and environment friendly. However, Sprinklers must be dry pipe to prevent the risk of leakage in data centre.

Question 14

An IS Auditor is reviewing fire safety arrangement in data centre where dry-pipe sprinklers are installed. A dry-pipe fire extinguisher uses:

A. Halon gas.
B. CO2
C. Water resides in the pipe with special water-tight sealants.
D. Water, but it enters the pipe only when fire has been detected.

Answer 14

D. Water, but it enters the pipe only when fire has been detected.

Sprinklers can be of two types i.e. dry pipe and wet pipe. Both uses water. In Wet System, water always remains in the system piping. Dry pipe does not have water in the pipes until an electronic fire alarm activates the water pump to send water into the system.

Question 15

An IS Auditor is reviewing fire safety arrangement in data center where wet-pipe sprinklers are installed. A wet-pipe fire extinguisher uses:

A. Water, but it enters the pipe only when fire has been detected.
B. CO2
C. Water resides in the pipe with special water-tight sealants.
D. Halon gas

Answer 15

C. Water resides in the pipe with special water-tight sealants.

Sprinklers can be of two types i.e. dry pipe and wet pipe. Both uses water. In Wet System, water always remains in the system piping. Dry pipe does not have water in the pipes until an electronic fire alarm activates the water pump to send water into the system.

Question 16

Which of the following is the Highest risk (to be given priority) with respect to use of CO2 and Halon gas as fire extinguishers:

A. Halon gas has negative impact on the ozone layer.
B. CO2 is not effective for solid combustible.
C. Halon is not effective for solid combustible.
D.Both present a risk to human life if used in closed room.

Answer 16

D. Both present a risk to human life if used in closed room.

Both CO2 and Halon gas reduces the oxygen ratio in atmosphere and hence they are risk to human
life if used in closed room. Protecting people’s life should always be of highest priority in fire suppression activities. In many countries installing or refilling halon fire suppression systems is not allowed. Although, both gases are effective for synthetic combustibles they are ineffective on solid combustibles.

Question 17

An IS Auditor is reviewing fire safety arrangement in data center. Which of the following is the area of MOST concern?

A. Use of FM-200 gas in a manned data centre.
B. Use of Dry-pipe sprinklers in an expensive data centre facility.
C. Use of Wet-pipe sprinklers in an expensive data centre facility.
D. Use of Carbon dioxide gas in a manned data centre.

Answer 17

D. Use of Carbon dioxide gas in a manned data centre.

Carbon dioxide is not safe for human life. FM-200 is a safe to use where people are present. Both
Dry-pipe and Wet-pipe are effective and environment friendly. Generally, Sprinklers must be dry pipe to prevent the risk of leakage in data centre. However, major risk is use of CO2 where human life in present.

Question 18

Which of the following gases is safest to be used in presence of human life?

A. CO2.
B. FM-200
C. Halon gas
D. Argonite gas.

Answer 18

B. FM-200

CO2 and Halon are not safe for human life. Argonite, though environment friendly & non-toxic, people
have suffocated by breathing argon by mistake. FM-200 is environment friendly and safe to be used when people are present.

Question 19

An IS auditor inspected a windowless room containing phone switching and networking equipment and documentation binders. The room was equipped with two handheld fire extinguishers—one filled with CO2, the other filled with halon. Which of the following should be given the HIGHEST priority in the auditor’s report?

A. The halon extinguisher should be removed because halon has a negative impact on the atmospheric ozone layer.
B. Both fire suppression systems present a risk of suffocation when used in a closed room.
C. The CO2 extinguisher should be removed, because CO2 is ineffective for suppressing fires involving solid combustibles (paper).
D. The documentation binders should be removed from the equipment room to reduce potential risks

Answer 19

B. Both fire suppression systems present a risk of suffocation when used in a closed room.

Question 20

A dry-pipe fire extinguisher system is a system that uses:

A. water, but in which water does not enter the pipes until a fire has been detected.
B. water, but in which the pipes are coated with special water-tight sealants.
C. carbon dioxide instead of water.
D. halon instead of water.

Answer 20

A. water, but in which water does not enter the pipes until a fire has been detected.