Foam and Soda Ash Fire Extinguishers

Q.

What is the principle of soda fire extinguisher

Q. A foam based fire extinguisher contains ________ and _________ in separate chambers.

1. aluminium sulphate and sodium bicarbonate
2. sulphuric acid and aluminium sulphate
3. liquid carbon and sulphuric acid
4. sulphuric acid and sodium bicarbonate

Q.

Soda-acid and foam-type fire extinguishers cannot be used to extinguish electrical fires:

1. True

2. False

Q.

What will be used to put off fire caused by electrical gadgets ?

Q.

What are the three essential requirements to produce fire? How fire extinguisher is useful for controlling the fire.

Q.

Which of the following is/are correct:

1. Soda-acid fire extinguisher can be used to extinguish oil-fed fires.

2. Liquid carbon dioxide fire extinguisher can extinguish both oil-fed fires.

3. Soda-acid fire extinguisher cannot be used to extinguish oil-fed fires.

4. Foam type fire extinguisher is used to extinguish oil-fed fires.

Q.

Manu was heating oil to fry potato chips. The cooking oil all of a sudden caught fire; he poured water to extinguish the fire. Do you think this action was suitable? If yes, why? If not, why not? In such a condition what should Manu have done?

Q.

What is a fire extinguisher?

Q.

Water is the best extinguisher for fires involving electrical equipment. (True or False). Also write the false statements in their correct form.

1. True
2. False

Q.

The fire produced by oil cannot be controlled by

1. a) ${\mathrm{CO}}_2$

2. b) Foam

3. c) Water

4. d) Both a and b

Q. Geeta marked the statements about fire extinguishers given by her teacher as true or false. Which of these statements are marked incorrectly by her?

1. None of these
2. 2 and 4 only
3. 1 and 4 only
4. 1 and 3 only

Q.

name the chemicals used in the acid fire extinguisher and the gas evolved from it when used

Q. A petroleum processing industry suddenly catches fire because of some reason. The employees ran outside and started showering water on the building but the fire did not stop. Which of the following can be used to stop the fire?

1. Hydrogen
2. Carbon Dioxide.
3. Oxygen Gas.
4. Nitrogen gas

Q. Explain, with the help of a labelled diagram, how a soda-acid type fire extinguisher works.

Q.

Manu was heating oil to fry potato chips. The cooking oil all of a sudden caught fire; he poured water to extinguish the fire. Do you think this action was suitable? If yes, why? If not, why not? In such a condition what should Manu have done?