Which of the following is/are correct:
Which of the following is/are correct:
The correct options are
B Liquid carbon dioxide fire extinguisher can extinguish both oil-fed fires.
C Soda-acid fire extinguisher cannot be used to extinguish oil-fed fires.
D Foam type fire extinguisher is used to extinguish oil-fed fires.
Soda-acid fire extinguisher cannot be used to extinguish oil-fed fires because the solution which is thrown by this extinguisher is heavier than oil. So, it sinks below the oil and does not work. While in the case of foam-type fire extinguishers, foam covers the oil as well as cuts off the air supply to the fire.
Moreover, in liquid carbon dioxide fire extinguishers when liquid CO2 is sprayed, the liquid vaporizes as it expands.The latent heat of vaporization cools the liquid & gas causing some of the liquid to freeze.
B
Liquid carbon dioxide fire extinguisher can extinguish both oil-fed fires.
C
Soda-acid fire extinguisher cannot be used to extinguish oil-fed fires.
D
Foam type fire extinguisher is used to extinguish oil-fed fires.
Soda-acid fire extinguisher cannot be used to extinguish oil-fed fires because the solution which is thrown by this extinguisher is heavier than oil. So, it sinks below the oil and does not work. While in the case of foam-type fire extinguishers, foam covers the oil as well as cuts off the air supply to the fire.
Moreover, in liquid carbon dioxide fire extinguishers when liquid CO2 is sprayed, the liquid vaporizes as it expands.The latent heat of vaporization cools the liquid & gas causing some of the liquid to freeze.
