Fire Main & Sprinkler System

Question 1

What type of fire does the Fire Main System fight?

Answer 1

Class A fires

Question 2

What sea chests are in each engine room? State when each sea chest is used.

Answer 2

Low & High sea chest
Low seachest in open waters, High seachest at port or shallow waters

Question 3

What fire pumps are in the FWD & AFT engine room?

Answer 3

AFT: 1,2,3
FWD: 4,5,6

Question 4

What is the capacity and delivered pressure of a fire pump?

Answer 4

Capacity: 200m^3/h
Delivered pressure: 9.0 bar

Question 5

In the engine rooms, which fire pumps are paired and usually used for fire fighting? What are the remaining fire pumps mainly used for?

Answer 5

FWD: 2,3
AFT: 4,5
Remaining fire pumps 1 & 6 are used for activating the bilge eductors

Question 6

State the 9 locations that the sprinkler system covers.

Answer 6

1. Armoury 1 & 2
2. Gunbay
3. Tank deck Zones 1 - 5
4. Hanger/elevator room
5. Ammo room
6. Fwd/Aft Flight deck
7. Aviation fuel pump room
8. Aviation fuel dispenser rooms 1 & 2
9. Mission planning room

Question 7

Describe the flow of seawater from the fire pump to the hangar.

Answer 7

Fire p/p → Engine Room “Ring” → Connecting firemain pipes → Tank Deck “Ring” → Connecting firemain pipes → Hangar “Ring”

Question 8

State the 3 tiers of control points for activation of fire pumps and their locations.

Answer 8

Tier 1: Group Starter Panel - E/R
Tier 2: RCV Panel - FWD E/R
Tier 3: SCMMS pg 44 - MCR

Question 9

What modes must the GSP and RCV panel be set at to transfer control of the fire pumps to the GSP, RCV panel, and SCMMS?

Answer 9

To transfer control to GSP: GSP MANUAL
To transfer control to RCV Panel: GSP RCV PANEL + RCV Panel LOCAL
To transfer control to SCMMS: GSP SCMMS + RCV Panel SCMMS

Question 10

State the 3 tiers of RCVs for sprinkler system and their locations.

Answer 10

Tier 1: RCV Cabinet - FWD E/R
Tier 2: RCV Panel - FWD E/R
Tier 3: SCMMS pg 44/45 - MCR

Question 11

What mode must the RCV panel be set at to transfer control of the RCVs in the sprinkler system to the RCV Cabinet, RCV panel, and SCMMS?

Answer 11

To transfer control to RCV Cabinet: No switch required.
To transfer control to RCV Panel: RCV Panel LOCAL
To transfer control to SCMMS: RCV Panel SCMMS

Question 12

Describe the 4-step sprinkler system activation sequence.

Answer 12

1. Ensure presence of power supply to selected fire pump
2. Ensure all necessary valves are at their desired operational position
3. Select mode of operation & start the selected fire pump, THROTTLE (partially open) the FP O/B v/v to achieve desired Fire Main pressure. Check pressure gauge to 9-10 bar
4. Open valves to selected coverage area

Question 13

What’s the desired position of the operational valves before activating the sprinkler system?

Answer 13

OPEN the following valves:
High/Low S/C
FP inlet
FP outlet (RCV)
Supply to E/R ring for FP 2/3/4/5
Main Engine and Generator Emergency cooling v/vs

CLOSE the Supply to E/R ring for FP 1/6

Question 14

Which 3 locations require 2 valves for emergency cooling in case the sprinkler system fails?

Answer 14

• Armoury 1 & 2
• Gun Bay
• Ammo Room

Question 15

State the locations of the 3 valve connection points from Engine Ring to Tank Deck Ring.

Answer 15

AHU 8 & 9, Machinery Storage Room and Machinery Room