F80 Fire Safety Systems 5

Question 1

Which type of smoke detector is generally more sensitive to slow, smoldering fires that produce large combustion particles?

Accepted Answer

Photoelectric detector

Answer

Photoelectric detectors use a light beam scattered by larger smoke particles and respond faster to slow, smoldering fires than ionization detectors.

Question 2

What is the purpose of a fire department connection (FDC) on a sprinkler or standpipe system?

Accepted Answer

To provide an external connection for the fire department to supplement water supply

Answer

The FDC (Siamese connection) allows fire department pumpers to inject water into a sprinkler or standpipe system to supplement or replace the normal water supply during a fire.

Question 3

According to IBC and NFPA 101, a corridor serving an occupant load of 50 or more must have a minimum clear width of:

Accepted Answer

44 inches

Answer

IBC Section 1005 and NFPA 101 require a minimum 44-inch clear corridor width when serving an occupant load of 50 or more persons.

Question 4

What distinguishes a 'Class I' standpipe system from a 'Class II' standpipe system?

Accepted Answer

Class I provides 2½-inch hose connections for fire department use; Class II provides 1½-inch hose stations for occupant use

Answer

Class I standpipes supply 2½-inch connections intended for trained fire department personnel, while Class II standpipes supply 1½-inch hose stations for first-aid use by occupants.

Question 5

A 'deluge' sprinkler system differs from a standard wet pipe system because:

Accepted Answer

All sprinkler heads are open and water flows to all heads simultaneously upon system activation

Answer

Deluge systems have all sprinklers open (no fusible element) and discharge water simultaneously through all heads when a detection device opens the deluge valve.

F80 Practice Test

F80 Practice Test

F80 Fire Safety Systems 5