Fire Protection Systems Flashcards

What is the primary purpose of a fire suppression system's deluge valve?

Answer: To simultaneously open all sprinkler heads in a zone when activated

A deluge valve opens to allow water to flow to all open sprinkler heads in a deluge system simultaneously when the system is triggered.

Which type of fire suppression system is most appropriate for protecting a room containing electrical switchgear?

Answer: Clean agent gaseous suppression system

Clean agent gaseous systems (such as FM-200 or Inergen) are preferred for electrical equipment rooms because they suppress fire without causing water damage or electrical hazards.

A standpipe system classified as Class II is intended for use by:

Answer: Building occupants as a first-aid measure before firefighters arrive

Class II standpipe systems provide 1½-inch hose stations for use by building occupants for first-aid fire fighting.

What happens to the air pressure in a dry-pipe sprinkler system when a sprinkler head fuses and opens?

Answer: Air pressure drops, allowing the dry-pipe valve to open and admit water

When a sprinkler fuses, air escapes through the open head, dropping the system pressure and triggering the dry-pipe valve to open and allow water to flow.

In a pre-action sprinkler system, water enters the pipes only when:

Answer: A separate detection system activates AND a sprinkler head opens

Pre-action systems require two independent events—detection system activation and sprinkler head fusing—before water is discharged, reducing accidental discharge risk.

What is the function of a fire department connection (FDC) on a sprinkler system?

Answer: To allow firefighters to supplement the water supply to the sprinkler system

The FDC allows fire department apparatus to pump additional water into the sprinkler system to maintain or boost pressure during a fire event.

Which NFPA standard governs the installation of sprinkler systems in most commercial buildings in the United States?

Answer: NFPA 13

NFPA 13, Standard for the Installation of Sprinkler Systems, is the primary standard governing sprinkler system design and installation in commercial buildings.