FOOD TECHNOLOGY

Detailed explanation-1: -False. Water cannot be used if electrical equipment is on fire because it can conduct electricity and cause harm. It is also not suitable to use water to extinguish fires involving inflammable materials like oil and petrol because water is heavier than oil and sinks below it.

Detailed explanation-2: -Water cools and smothers the fire at the same time. It cools it so much that it can’t burn anymore, and it smothers it so that it can’t make any more of the oxygen in the air explode. You can also put out a fire by smothering it with dirt, sand, or any other covering that cuts the fire off from its oxygen source.

Detailed explanation-3: -As water is heavier than petrol therefore slips down permitting the petrol to rise to the surface and continue to burn. Besides, the existing temperature is so high that the water poured on the fire evaporates even before it can extinguisher the fire.

Detailed explanation-4: -Hence, water helps in extinguishing fire as water helps in cooling the combustible material so that its temperature is brought below the ignition temperature.