Quiz for fire detection and alarm system Flashcards
- The built-in measures that aid in providing fire safety in buildings are called
Passive system
- Which of the following cannot be used to extinguish electrical fires:
a. Halon extinguishers
b. CO2 extinguishers
c. Dry chemical power extinguishers
d. None of the above
None of the above
- Which type of fire extinguisher is bad for the ozone layer?
Halon extinguishers
- What are some properties of brandfilt?
Has fire retardants and does not allow air to pass
- What type of fire extinguisher is not suitable for class A fires (Paper, textiles, wood, most plastics & rubber)?
CO2 extinguisher
- Fire hose reels are used to fires that are:
For big and small in its growth stage
- What are the seven layers of fire safety in buildings?
Prevention>detection>early-suppression>evacuation>compartmentation>structural safety>fire fighting
- Why sound alarm is important?
It enables fire safety for people who are sleeping
- Which Swedish code has rules for alarm system with spoken language?
SBF 502:1
- For ‘Larmlagring’, how a staff takes action if rescue service alarm light is on and upon investigation, he/she/it does not find any burning fire?
Resets alarm
- MCP in alarm system stands for
Manual call Point
- What are fire signatures that are used by detectors to detect fire?
Measurable changes in environment caused by fire
- Which of the following is not a fire signature?
a. Temperature
b. Energy transfer
c. Heat
d. None of the above
None of the above
- Which is the slowest fire signature(s) amongst the list below?
Aerosols and temperature
- What might cause fire gases not to reach the ceiling fully?
a. Fires from embers
b. Small fires
c. Ventilation system
d. All the above
All the above
- In a fire, radiation is caused by….
Soot
- Why changes in the concentration of CO are easy to detect than that of CO2?
CO is only 0.00% in the atmosphere and hence small changes can be easily detected
- What gas is formed when poly(vinyl chloride) burns?
Hydrogen chloride
- Most detectors can detect aerosols in what size range?
0.1 – 2 µm
- Which size of aerosols cause hindrance in proper evacuation?
> 0.3 µm
- Which kind of fire detectors should be avoided in the kitchen?
Ionisation smoke detectors
- Which detectors uses a fan to retrieve air out of the monitored space?
Sampling system detector
- Which detector can be used only if there is a proper way to see the monitored object?
Flame detector
- Which detector can be used for fires in the lawn of a house?
Flame detector
- Single frequency IR detectors have a wavelength range of:
4.3 µm
- Johannes has intentionally started a fire in the classroom using magnesium he found from the chemistry lab in the C hus. What type of detector will not detect this fire?
Smoke detector and IR detector
- Evelina has just eaten a big pizza with her hands. Then without washing her hands, she went on to install a new type of fire detector. However, Jennifer, again started a fire, but this time using propane. Everyone in the room, which contains the fire, is in danger if this type of detector was installed by Evelina:
UV detector
- What is the range of ppm that gas detectors can usually detect?
10 – 100 ppm
- What element’s isotope is used in smoke detectors?
Americium-241
- What smoke detector uses a light trap?
Optical light scattering detector