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The job of a fire extinguisher is to cut off the supply of air, or to bring down the temperature of the fuel, or both. Consider the following statements in the context of cutting off the supply of air:
1. Water vapours, formed due to water being poured on the flame, surround the combustible material, helping in cutting off the supply of air.
2. CO2, being heavier than oxygen, covers the fire like a blanket. Since the contact between the fuel and oxygen is cut off, the fire is controlled.
Which of the statements given above is/are correct?
  • a)
    1 Only
  • b)
    2 Only
  • c)
    Both 1 and 2
  • d)
    Neither 1 nor 2
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
The job of a fire extinguisher is to cut off the supply of air, or to...
  • Water cools the combustible and the water vapours formed also surround the combustible material, cutting off the supply of air. Thus, the fire is extinguished. The most common fire extinguisher is water.
  • But for fires involving electrical equipment and inflammable materials like petrol, carbon dioxide (CO2) is the best extinguisher. CO2, being heavier than oxygen, covers the fire like a blanket. Since the contact between the fuel and oxygen is cut off, the fire is controlled.
  • It does not harm the electrical equipment. CO2 can be stored at high pressure as a liquid in cylinders. When released from the cylinder, CO2 expands enormously in volume and cools down.
  • Another way to get CO2 is to release a lot of dry powder of chemicals like sodium bicarbonate (baking soda) or potassium bicarbonate. On coming near the fire, these chemicals decompose to give off CO2.
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The job of a fire extinguisher is to cut off the supply of air, or to bring down the temperature of the fuel, or both. Consider the following statements in the context of cutting off the supply of air:1. Water vapours, formed due to water being poured on the flame, surround the combustible material, helping in cutting off the supply of air.2. CO2, being heavier than oxygen, covers the fire like a blanket. Since the contact between the fuel and oxygen is cut off, the fire is controlled.Which of the statements given above is/are correct?a) 1 Onlyb) 2 Onlyc) Both 1 and 2d) Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?
Question Description
The job of a fire extinguisher is to cut off the supply of air, or to bring down the temperature of the fuel, or both. Consider the following statements in the context of cutting off the supply of air:1. Water vapours, formed due to water being poured on the flame, surround the combustible material, helping in cutting off the supply of air.2. CO2, being heavier than oxygen, covers the fire like a blanket. Since the contact between the fuel and oxygen is cut off, the fire is controlled.Which of the statements given above is/are correct?a) 1 Onlyb) 2 Onlyc) Both 1 and 2d) Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about The job of a fire extinguisher is to cut off the supply of air, or to bring down the temperature of the fuel, or both. Consider the following statements in the context of cutting off the supply of air:1. Water vapours, formed due to water being poured on the flame, surround the combustible material, helping in cutting off the supply of air.2. CO2, being heavier than oxygen, covers the fire like a blanket. Since the contact between the fuel and oxygen is cut off, the fire is controlled.Which of the statements given above is/are correct?a) 1 Onlyb) 2 Onlyc) Both 1 and 2d) Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The job of a fire extinguisher is to cut off the supply of air, or to bring down the temperature of the fuel, or both. Consider the following statements in the context of cutting off the supply of air:1. Water vapours, formed due to water being poured on the flame, surround the combustible material, helping in cutting off the supply of air.2. CO2, being heavier than oxygen, covers the fire like a blanket. Since the contact between the fuel and oxygen is cut off, the fire is controlled.Which of the statements given above is/are correct?a) 1 Onlyb) 2 Onlyc) Both 1 and 2d) Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?.
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