Q5. A. During the weighment of CO2 bottles required for total flooding of Engine room, it was observed that few bottles are less than the original capacity. State the reasons for the same and checks / tests to be made prior refilling;
B. State how often the CO2 bottles are required to be weighed and pressure tested.
Q2. Explain in detail how you would isolate CO2 Fixed firefighting system foe routine maintenance. Please enumerate the Maintenance schedules and their frequency performed on this system. Describe all tests and inspections you would make and how you would return the system to service.
Q5: C02 is to be released in engine room in case of fire. Briefly describe steps taken before it can be released. What means are provided to prevent inadvertent release of C02 in engine room?
Q8. Describe CO2 fixed firefighting system for machinery spaces and cargo spaces of a bulk carrier. Explain safety precautions taken prior to release of CO2 to the engine room. (20)
Q4. What maintenance and checks are carried out on CO2 bottles:
a) Weekly
b) Monthly
c) Yearly
d) 2 Yearly basis and
What schedule is followed for pressure testing of the bottles. (20)
Q8. a) Sketch and describe a total flooding CO2 gas system suitable for the protection of machinery spaces. (8)
b) State, with reasons, which valve should be operated first in the system shown in (a). (8)
Q9. a) Sketch and describe a total flooding CO2 gas system suitable for the protection of machinery spaces. (6)
b) State, with reasons, which valve should be operated first in the system shown in (a) (4)
c) State the periodic maintenance required on the system. (6)
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