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Q5. Describe the procedure for the regular maintenance routines to be carried out on the Fixed CO2 fire-fighting system. (16)

Q8. a) Explain the working principle of a hyper mist fire suppression system on ships. How does this system differ from traditional water-based fire suppression methods? (8)

b) Discuss the installation, maintenance, and testing requirements for a hyper mist system on board ships. How does regular upkeep ensure the system’s effectiveness in an emergency? (8)

Q9. a) Sketch a line diagram of a mechanical low expansion foam fixed firefighting system suitable for machinery spaces. (6)
b) Describe the operation of the system sketched. (6)
c) Explain how a mixture of foam making compound and sea water are converted into foam. (4)

Q3. A. Sketch a line diagram of an automatic water sprinkler fire detection/alarm and firefighting system fitted in accommodation and service spaces of passenger vessels; B. Describe the system sketched above and its mode of operation; C. State the action that should be taken after the use of sea water in the firefighting system

Q4. a) Sketch and describe the working of a Sprinkler type, automatic fire detection and firefighting system on ships, labelling it components in the circuit (10)

(b) What maintenance is required periodically? State the routine tests required? (10)

Q5. Write short notes on following:

(a) Flammability diagram and its significance (10)

(b) Risk assessment: why and how it is carried out on ships with examples (10)

Q1. Considering that the engine room is the most common single space on board ships for fire to break out, discuss the merits and demerits of the following fixed firefighting systems: (20)

(a) Carbon dioxide

(b) Pressure water spray

(c) High expansion foam

Q4. During the loading of a petroleum tanker, the incoming cargo forces out from the tank its previous atmospheric contents (air-vapour-inert gas).

Explain:

(a) The dangers of venting during the loading via open tank hatches (10)

(b) Why the pressure/vacuum valves is not used for venting (10)

Q2. Describe the periodic checks which should be made on a fixed CO2 fire extinguishing system installed on a ship and reasons for the same. (20)

Q2. With respect to Fire protection, fire detection and Fire extinction:

a) Describe, for a ship that carries dangerous cargo, the bridge-based detection arrangement. (10)

b) State how fires are dealt with, bearing in mind that dangerous cargo quantity varies. (10)

Q3. a) Describe with the aid of a Sketch the release arrangement for a machinery space fixed fire-fighting installation using CO2 system. State in your answer any special need for rapid delivery of the gas and the time permitted for discharge. (10)

b) Explain why and how evacuation of the machinery space is considered necessary before releasing CO2. (10)

Q8. Fire protection for the accommodation spaces of passenger vessels incorporates means of detection, fighting and containment to reduce the spread of any fire.

A. Describe the means of detection and firefighting commonly installed. (8)

B. State how the spread of fire is prevented and how the containment is used with the firefighting and detection arrangement to locate the fire. (8)