5. Exercise V

 

(a). Water is a conductor of electricity, so it can efficiently conduct heatdoes not conduct heatdoes not conduct electric currentconduct electric current and cause danger of electric shocks or short circuits. Therefore, water cannot control the fire involving electrical equipment.

 

(b). LPG, a cleaner fuel than Wood, doesn't release smoke and other pollutants. On the other hand, Wood emits a lot of smoke and fumes, polluting the atmosphere, causing pollution and leading to heart diseasesrespiratory diseasescronic diseasescarsinogenic diseases. Hence, LPG is a better domestic fuel than Wood.

 

(c). Paper by itself catches fire quickly because it has a high ignition powerhigh ignition temperaturelow ignition temperaturelow ignition power, but when wrapped around an aluminium pipe, paper's ignition temperature isn't attained. This is due to aluminium metal absorbing the heat supplied to paper. Hence, it does not catch fire easily.