TB 042- Single- Station Smoke Detectors

Question 1

Fire is the _______ leading cause of accidental death in the United States

Answer 1

3rd

Question 2

________ out of ______ Americans are killed by fire at home

Answer 2

7 out of 10

Question 3

______ out of ______ fatal home fires start between ______pm and ______ am

Answer 3

6 out of 10, 9:00pm and 6:00am

Question 4

Current law in building and fire codes require smoke detectors in all new and existing duplexes, apartments, condos, and hotels as of ___________?

Answer 4

August 1, 1980

Question 5

How does a photoelectric smoke detector work?

Answer 5

A light source projects a beam of light across a darkened chamber within the detector . A photocell is located in the chamber out of the normal light path. When smoke enters, light striking the smoke is scattered in the same way that auto headlights are scattered by fog. When light is scattered into photocell, alarm sounds

Question 6

How does an ionization smoke detector work?

Answer 6

Use a minute amount of radioactive material to ionize the air between two interior electrodes conducting a small electric current. Invisible particles that enter the ionized detector chamber reduce the flow of current, finally break the current flow, and then set off an alarm

Question 7

Where shall smoke detectors be installed in a residence?

Answer 7

Each bedroom, hallway or area giving access to the bedroom, and in a multi story dwelling on each level at the top of the stairwell

Question 8

Photoelectric detectors are more sensitive to _________ fires

Answer 8

Smoldering

Question 9

Ionization detectors are more sensitive to _______ fires

Answer 9

Flaming