Quiz for fire detection and alarm system Flashcards
(30 cards)
1
Q
- The built-in measures that aid in providing fire safety in buildings are called
A
Passive system
2
Q
- 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
A
None of the above
3
Q
- Which type of fire extinguisher is bad for the ozone layer?
A
Halon extinguishers
4
Q
- What are some properties of brandfilt?
A
Has fire retardants and does not allow air to pass
5
Q
- What type of fire extinguisher is not suitable for class A fires (Paper, textiles, wood, most plastics & rubber)?
A
CO2 extinguisher
6
Q
- Fire hose reels are used to fires that are:
A
For big and small in its growth stage
7
Q
- What are the seven layers of fire safety in buildings?
A
Prevention>detection>early-suppression>evacuation>compartmentation>structural safety>fire fighting
8
Q
- Why sound alarm is important?
A
It enables fire safety for people who are sleeping
9
Q
- Which Swedish code has rules for alarm system with spoken language?
A
SBF 502:1
10
Q
- 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?
A
Resets alarm
11
Q
- MCP in alarm system stands for
A
Manual call Point
12
Q
- What are fire signatures that are used by detectors to detect fire?
A
Measurable changes in environment caused by fire
13
Q
- Which of the following is not a fire signature?
a. Temperature
b. Energy transfer
c. Heat
d. None of the above
A
None of the above
14
Q
- Which is the slowest fire signature(s) amongst the list below?
A
Aerosols and temperature
15
Q
- 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
A
All the above
16
Q
- In a fire, radiation is caused by….
A
Soot
17
Q
- Why changes in the concentration of CO are easy to detect than that of CO2?
A
CO is only 0.00% in the atmosphere and hence small changes can be easily detected
18
Q
- What gas is formed when poly(vinyl chloride) burns?
A
Hydrogen chloride
19
Q
- Most detectors can detect aerosols in what size range?
A
0.1 – 2 µm
20
Q
- Which size of aerosols cause hindrance in proper evacuation?
A
> 0.3 µm
21
Q
- Which kind of fire detectors should be avoided in the kitchen?
A
Ionisation smoke detectors
22
Q
- Which detectors uses a fan to retrieve air out of the monitored space?
A
Sampling system detector
23
Q
- Which detector can be used only if there is a proper way to see the monitored object?
A
Flame detector
24
Q
- Which detector can be used for fires in the lawn of a house?
A
Flame detector
25
25. Single frequency IR detectors have a wavelength range of:
4.3 µm
26
26. 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
27
27. 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
28
28. What is the range of ppm that gas detectors can usually detect?
10 – 100 ppm
29
29. What element’s isotope is used in smoke detectors?
Americium-241
30
30. What smoke detector uses a light trap?
Optical light scattering detector
