ETO ETO Exam papers 📅 Sep 2022

Exam Question

With reference to an automatic water sprinkler, fire detection, alarm and extinguishing system for accomodation spaces: (16)

(a) (i) Sketch a typical system

(ii) Describe the operation of this system

(b) State the sources of water available

(d) State how the temperature rating of the sprinker head is determined

Reference Answer

(a)
The automatic water sprinkler system is an automatic fire detection, alarm, and extinguishing system that can quickly and effectively deal with any outbreak of fire that may occur in accommodations or other spaces on ships.
A tank (half filled with fresh water) initially charges the entire system with fresh water at a pressure of about 8 bar and maintains it under pressure with compressed air.
It is also connected to an independent seawater pump with its own seawater suction. Each sprinkler head has a quartzoid bulb, which retains a diaphragm seal in the outlet of the water pipe.

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