(Solved):   Q3. (c) An information leaflet publiahed by Indoor Air Quality Information Centre in Hong ...

 

Q3. (c) An information leaflet publiahed by Indoor Air Quality Information Centre in Hong Kong SAR contained the following message about the concern on Volatile Organic Compounds (VOCs): "You may have experienced an unpleasant smell or irritation of the eyes, nose and throat when you entered a newly decorated room, opened the packing of a new pressed-wood furnifure, or used an aerosol product. In these cases, you may have been exposed to the volatile organic compounds (VOCs) emitted from these products. In fact, you can avoid or reduce such exposture by simple means. " Briefly explain TWO possible causes of indoor VOC problem and suggest TWO methods to avoid or reduce indoor VOC problem after the renovation and refurbishment works for an office. (6)Marks) (d) Photocatalytic Oxidation (PCO) Technology is nowadays applied in air purification unit to eliminate air-bome bacteria in indoor space. Briefly illustrate the working principle of PCO for dissociating bacteria. (4 Marks) EG114702/EG314702/EG524702-Indoor Environment and HVAC Systems (MBS4241)-July 2019 Page 6 of 11