Answer to Question #44070 in Physical Chemistry for Zeph

Question

9. A local authority has experienced a number of deaths in older, two storey local authority dwellings in which battery operated smoke alarm had been installed by the local authority as landlord. On inspection it is found that in most cases batteries had been removed from the smoke alarms
I. Comment on reason as to why the batteries might have been removed
II. What advice would you offer the local authority in terms of their future policy on provision of smoke alarms, with particular reference to BS 5839-1. What grade or category is currently installed? Outline the minimum grade category shown in Table 1 for older properties, possibly no longer in good condition. As this part (9) is 60% of marks, a formal mini-report of around 250 words is envisaged for a full answer.
10. You are asked to give advice on reduction of false alarms in a large, open plan process area in a factory(large machinery 10m high running along whole length of area) On investigation you find that many of the false alarms occur at the end of every shift, when the process generates dust and steam during equipment cleaning.
I. What is the likely fire detection system present which will be experiencing these problems? What is its purpose? Why was this detection chosen?
II. Suggest at least three measures that might be taken only in respect of fire detection system to reduce the frequency of false alarms
III. For each measures discuss any disadvantages that may be associated with the measures and any consequent qualifications, limitations or restrictions that might apply to the use of the measure, with special reference to Filtering measures in BS 5839-1
IV. What alternative approach not using conventional fire detectors but still forming part of the detection system might suit this building? See commentary on choice of detection in BS 5839-1 or guide