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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)

Q7. a) With reference to SOLAS 74 amendments 2000, maintenance plan is to be kept on-board ship for firefighting system,

a) Enumerate the list of fire protection system and fire-fighting systems and appliances which will be required to be included in the maintenance plan. (8)

b) Training manual as required by SOLAS 74 amendments 2000, chapter II -2 contains instructions and information with respect to fire fighting. List the same and their significance. (8)

Q8. With reference to fire smothering agents explain why:

a) Effectiveness of foam is directly related to its degree of effervescence and surface tension. (6)

b) low expansion foam is best suited for use against localized fire, while high expansion foam is most effective in with major conflagrations,

c) In the absence of foam appliances, water jets can be effectively used against oil fires (5)

Q7. a) Explain working of galley CO2 firefighting control system (8)

b) sketch circuit diagram and explain working of electrical oven fitted in a ship’s galley. (8)

Q9. With reference to the fixed CO2 flooding system for fire fighting on board ships, explain the following:

a) Advantages and disadvantages of CO2 as a fire fighting medium (8)

b) The purpose of providing time delay with a suitable block and line diagram (4)

c) What are the jobs pertaining to the five yearly maintenance routines on the system. (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

Q8. How will you fight a fire in a purifier room? How will you at least restrict the fire if you are the first person to sight the fire in the purifier room? (16)

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)

Q8.a) CO2 is to be released in engine room in case of fire. Briefly describe steps taken before it can be released.

b) What means are provided to prevent inadvertent release of CO2 in engine room?

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)