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Q5. (a) Describe with the aid of a sketch the release arrangement for a machinery space fixed fire-fighting installation using the CO2. State in your answer any special need for rapid delivery of the gas and the time permitted for discharge.

(b) Explain precautions to be taken prior release of CO2.

(c) During the weighment of CO2, if few bottles are found less than the original capacity. State the reasons for the same and checks / tests to be made prior refilling.

(d) With reference to MSC1 /Circ. 1318 / Rev.1, high pressure cylinders (CO2 bottles) are subjected to an internal inspection and hydrostatic test. State the stipulated criteria for such hydrostatic test and periodic test interval of high-pressure cylinders (CO2 bottles).