Fire Flashcards
1
Q
Location and use of deck isolation valve
A
- Throughout the length of the ship
- Can be accessed via deck or through ER
- Isolates deck fire line to prevent loss of water in damaged area and maintain pressure where it is required
2
Q
How do you check the integrity of your isolation valve seats
A
- Hydrant open with water running
- Close isolation valves one by one
- Should observe water stopping
3
Q
BA test and Checks
A
- Visor
- Straps
- Demand valve
- Hoses
- Harness
- BA pressure
- Low level whistle
- Lifeline
- Positive pressure
- Negative Pressure
- Pressure should not drop more then 10 bars in 1 minute
4
Q
How do the different fire fighting mediums effect the Fire Triangle?
A
- Water and Hi-Fog cool
- Foam and CO₂ restrict O₂
- Fuel needs to be isolated
- DP stops chemical reaction
5
Q
Where do you use high expansion and low expansion foam?
A
HE for enclosed spaces
LE for open spaces
6
Q
What are the expansion ratios and rates of HE and LE foam?
A
HE 500:1, 1m/1min
LE 12:1, 150mm/5min
7
Q
How much foam are you required to carry?
A
5 x the volume of the largest space on your vessel
8
Q
Requirements for A Class subdivisions
A
- Constructed of steel or other equivalent materials
- Temp of door will not rise above 140°C for certain time period depending on door (A-60, A-30, A-15, A-0)
- Prevent passage of smoke and flame for one hour
9
Q
Requirements for B Class subdivisions
A
- Constructed of non-combustible materials
- Temp of door will not rise above 140°C for certain time period depending on door (B-15, B-0)
- Prevent passage of smoke and flame for 30mins
10
Q
What is the bulkhead deck?
A
- The uppermost deck up to which the transverse watertight bulkheads are carried
11
Q
What is a Main vertical zone?
A
- Section of the ship divided by Class A subdivision.
- Generally do not exceed 40m
