Question

Water can be used as fire extinguisher when __________
1. The cause of fire is short circuit
2. fire is due to burning of wood
3. fire has caused due to petrol
4. All the above

Answer 1

Correct Answer - Option 2 : fire is due to burning of wood

Explanation:

• The water we usually use is not pure water. 
• The water which is not pure contains ions that conduct electricity. 
• So, fire due to electrical short circuit or leakage of current will do more damage if we use water. 
• We cannot use water when the fire has caused due to petroleum product. 
• Water is heavier than oil, So the water will get settled down the oil and will be inefficient in extinguishing the fire. 
• So, water cannot be effective in fire extinguishing when the fire is due to electricity or petrol / diesel. 
• It is effective when the fire is due to wood. 

So, the correct option is fire is due to burning of wood.

CO₂ Gas is most effective fire extinguisher in case of fire due electricity.